./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/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_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/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_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- 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 20:54:11,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:54:11,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:54:11,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:54:11,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:54:11,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:54:11,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:54:11,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:54:11,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:54:11,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:54:11,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:54:11,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:54:11,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:54:11,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:54:11,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:54:11,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:54:11,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:54:11,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:54:11,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:54:11,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:54:11,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:54:11,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:54:11,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:54:11,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:54:11,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:54:11,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:54:11,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:54:11,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:54:11,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:54:11,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:54:11,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:54:11,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:54:11,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:54:11,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:54:11,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:54:11,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:54:11,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:54:11,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:54:11,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:54:11,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:54:11,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:54:11,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:54:11,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:54:11,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:54:11,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:54:11,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:54:11,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:54:11,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:54:11,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:54:11,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:54:11,585 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:54:11,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:54:11,586 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:54:11,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:54:11,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:54:11,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:54:11,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:54:11,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:54:11,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:54:11,587 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:54:11,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:54:11,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:54:11,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:54:11,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:54:11,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:54:11,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:54:11,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:11,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:54:11,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:54:11,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:54:11,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:54:11,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:54:11,590 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:54:11,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:54:11,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:54:11,591 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_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2022-11-02 20:54:11,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:54:11,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:54:11,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:54:11,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:54:11,931 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:54:11,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2022-11-02 20:54:12,021 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/data/dd17a3d46/58e9c2e4fd7a4633ac33dd830bc931f6/FLAG6063bd89b [2022-11-02 20:54:12,583 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:54:12,583 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2022-11-02 20:54:12,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/data/dd17a3d46/58e9c2e4fd7a4633ac33dd830bc931f6/FLAG6063bd89b [2022-11-02 20:54:12,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/data/dd17a3d46/58e9c2e4fd7a4633ac33dd830bc931f6 [2022-11-02 20:54:12,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:54:12,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:54:12,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:12,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:54:12,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:54:12,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e30ae99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12, skipping insertion in model container [2022-11-02 20:54:12,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:54:12,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:54:13,165 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_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2022-11-02 20:54:13,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:13,192 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:54:13,215 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_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2022-11-02 20:54:13,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:13,251 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:54:13,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13 WrapperNode [2022-11-02 20:54:13,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:13,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:13,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:54:13,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:54:13,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,291 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-02 20:54:13,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:13,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:54:13,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:54:13,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:54:13,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,313 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:54:13,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:54:13,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:54:13,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:54:13,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (1/1) ... [2022-11-02 20:54:13,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:13,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:54:13,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:54:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:54:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:54:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:54:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:54:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:54:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:54:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:54:13,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:54:13,487 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:54:13,490 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:54:13,740 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:54:13,746 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:54:13,761 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-02 20:54:13,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:13 BoogieIcfgContainer [2022-11-02 20:54:13,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:54:13,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:54:13,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:54:13,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:54:13,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:54:12" (1/3) ... [2022-11-02 20:54:13,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4763b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:13, skipping insertion in model container [2022-11-02 20:54:13,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:13" (2/3) ... [2022-11-02 20:54:13,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4763b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:13, skipping insertion in model container [2022-11-02 20:54:13,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:13" (3/3) ... [2022-11-02 20:54:13,780 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2022-11-02 20:54:13,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:54:13,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:54:13,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:54:13,948 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;@6798f86d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:54:13,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:54:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:54:13,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:13,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:13,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-11-02 20:54:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043676309] [2022-11-02 20:54:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,154 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 20:54:14,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043676309] [2022-11-02 20:54:14,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043676309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:14,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:14,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413746223] [2022-11-02 20:54:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:54:14,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:54:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:54:14,198 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 20:54:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:14,221 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-11-02 20:54:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:54:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:54:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:14,235 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:54:14,236 INFO L226 Difference]: Without dead ends: 21 [2022-11-02 20:54:14,239 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 20:54:14,245 INFO L413 NwaCegarLoop]: 31 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, 31 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 20:54:14,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-02 20:54:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-02 20:54:14,283 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 20:54:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-02 20:54:14,287 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-11-02 20:54:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:14,288 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-02 20:54:14,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 20:54:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-02 20:54:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:54:14,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:14,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:14,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:54:14,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-11-02 20:54:14,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:14,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199736816] [2022-11-02 20:54:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,421 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 20:54:14,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199736816] [2022-11-02 20:54:14,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199736816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:14,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:14,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:54:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536426068] [2022-11-02 20:54:14,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:54:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:54:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:54:14,426 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 20:54:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:14,467 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-02 20:54:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:54:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:54:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:14,469 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:54:14,469 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:54:14,470 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 20:54:14,471 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:14,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:54:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-11-02 20:54:14,477 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 20:54:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-02 20:54:14,478 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-11-02 20:54:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:14,479 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-02 20:54:14,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 20:54:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-02 20:54:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:54:14,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:14,480 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 20:54:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:54:14,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-11-02 20:54:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:14,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130176214] [2022-11-02 20:54:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:14,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130176214] [2022-11-02 20:54:14,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130176214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:14,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:14,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:54:14,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484526855] [2022-11-02 20:54:14,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:14,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:14,667 INFO L87 Difference]: Start difference. First operand 22 states and 26 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 20:54:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:14,776 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-11-02 20:54:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:14,778 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 20:54:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:14,779 INFO L225 Difference]: With dead ends: 43 [2022-11-02 20:54:14,779 INFO L226 Difference]: Without dead ends: 30 [2022-11-02 20:54:14,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:14,781 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:14,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-02 20:54:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-11-02 20:54:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-02 20:54:14,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-02 20:54:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:14,789 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-02 20:54:14,789 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 20:54:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-02 20:54:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:54:14,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:14,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:14,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:54:14,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-11-02 20:54:14,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:14,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738948650] [2022-11-02 20:54:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:54:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738948650] [2022-11-02 20:54:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738948650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826890618] [2022-11-02 20:54:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:14,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:14,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:14,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:54:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:54:15,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:54:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826890618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:15,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:15,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:54:15,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262768142] [2022-11-02 20:54:15,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:15,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:54:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:15,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:54:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:54:15,178 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 20:54:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:15,239 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-11-02 20:54:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:54:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:54:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:15,241 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:54:15,241 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 20:54:15,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:54:15,243 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:15,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 20:54:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-02 20:54:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 20:54:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-02 20:54:15,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-11-02 20:54:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:15,251 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-02 20:54:15,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 20:54:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-02 20:54:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:54:15,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:15,252 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, 1, 1, 1, 1] [2022-11-02 20:54:15,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:15,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-11-02 20:54:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:15,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176910580] [2022-11-02 20:54:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:54:15,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176910580] [2022-11-02 20:54:15,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176910580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884116384] [2022-11-02 20:54:15,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:15,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:15,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:15,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:54:15,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:54:15,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:54:15,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884116384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:15,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:15,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-02 20:54:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000685828] [2022-11-02 20:54:15,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:15,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:54:15,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:54:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:54:15,831 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:15,962 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-02 20:54:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:54:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:54:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:15,964 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:54:15,964 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 20:54:15,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:54:15,965 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:15,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 20:54:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-11-02 20:54:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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 20:54:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-02 20:54:15,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-11-02 20:54:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:15,973 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-02 20:54:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-02 20:54:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:54:15,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:15,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:16,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:16,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:16,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-11-02 20:54:16,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:16,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503781441] [2022-11-02 20:54:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:18,805 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 20:54:18,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503781441] [2022-11-02 20:54:18,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503781441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196336019] [2022-11-02 20:54:18,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:54:18,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:18,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:18,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:54:18,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:54:18,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:18,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:54:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:19,046 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 15 treesize of output 11 [2022-11-02 20:54:20,959 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:20,959 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 15 treesize of output 16 [2022-11-02 20:54:21,220 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 20:54:21,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:26,525 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 33 treesize of output 29 [2022-11-02 20:54:26,542 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:26,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 74 [2022-11-02 20:54:26,638 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 34 treesize of output 30 [2022-11-02 20:54:26,661 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:54:26,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 77 [2022-11-02 20:54:27,004 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 20:54:27,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196336019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:27,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:27,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 29] total 71 [2022-11-02 20:54:27,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148343013] [2022-11-02 20:54:27,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:27,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-02 20:54:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:27,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-02 20:54:27,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=4589, Unknown=0, NotChecked=0, Total=4970 [2022-11-02 20:54:27,009 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 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 20:54:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:33,331 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-11-02 20:54:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:54:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 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 35 [2022-11-02 20:54:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:33,334 INFO L225 Difference]: With dead ends: 102 [2022-11-02 20:54:33,334 INFO L226 Difference]: Without dead ends: 96 [2022-11-02 20:54:33,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3392 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=869, Invalid=10687, Unknown=0, NotChecked=0, Total=11556 [2022-11-02 20:54:33,339 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1171 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:33,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 163 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 699 Invalid, 0 Unknown, 1171 Unchecked, 0.6s Time] [2022-11-02 20:54:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-02 20:54:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2022-11-02 20:54:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 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 20:54:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-11-02 20:54:33,356 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2022-11-02 20:54:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:33,357 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-11-02 20:54:33,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 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 20:54:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-11-02 20:54:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:54:33,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:33,359 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, 1, 1, 1, 1] [2022-11-02 20:54:33,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:33,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:33,574 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-11-02 20:54:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481037794] [2022-11-02 20:54:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:33,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:54:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481037794] [2022-11-02 20:54:33,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481037794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546884129] [2022-11-02 20:54:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:54:33,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:33,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:33,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:54:33,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:54:33,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:54:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:54:33,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:54:33,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546884129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:33,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:33,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-02 20:54:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227418243] [2022-11-02 20:54:33,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:54:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:54:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:54:33,943 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 20:54:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:34,149 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-11-02 20:54:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:54:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) Word has length 37 [2022-11-02 20:54:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:34,150 INFO L225 Difference]: With dead ends: 113 [2022-11-02 20:54:34,150 INFO L226 Difference]: Without dead ends: 65 [2022-11-02 20:54:34,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:54:34,151 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:34,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 46 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-02 20:54:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-02 20:54:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 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 20:54:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-11-02 20:54:34,166 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 37 [2022-11-02 20:54:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:34,166 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-11-02 20:54:34,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 20:54:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-11-02 20:54:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:54:34,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:34,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:34,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:34,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:34,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2022-11-02 20:54:34,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:34,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523955150] [2022-11-02 20:54:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:34,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:54:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523955150] [2022-11-02 20:54:34,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523955150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:34,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372546976] [2022-11-02 20:54:34,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:54:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:34,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:34,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:54:34,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:54:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:54:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:54:34,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:54:34,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372546976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:34,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:34,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-02 20:54:34,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147138000] [2022-11-02 20:54:34,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:54:34,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:54:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:54:34,749 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 20:54:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:34,938 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-11-02 20:54:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:54:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) Word has length 39 [2022-11-02 20:54:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:34,939 INFO L225 Difference]: With dead ends: 99 [2022-11-02 20:54:34,939 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 20:54:34,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:54:34,941 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:34,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 28 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 20:54:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-11-02 20:54:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 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 20:54:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-02 20:54:34,950 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-11-02 20:54:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:34,950 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-02 20:54:34,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 20:54:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-02 20:54:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:54:34,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:34,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:35,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:35,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:54:35,178 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-11-02 20:54:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:35,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142691445] [2022-11-02 20:54:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:38,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142691445] [2022-11-02 20:54:38,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142691445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:38,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49454441] [2022-11-02 20:54:38,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:54:38,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:38,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:38,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:54:38,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:54:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:38,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-02 20:54:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:41,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:10,662 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:10,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 169 [2022-11-02 20:55:13,815 INFO L356 Elim1Store]: treesize reduction 146, result has 8.2 percent of original size [2022-11-02 20:55:13,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 24 [2022-11-02 20:55:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:14,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49454441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:14,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:14,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 93 [2022-11-02 20:55:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760403009] [2022-11-02 20:55:14,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:14,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-02 20:55:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-02 20:55:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=7863, Unknown=7, NotChecked=0, Total=8556 [2022-11-02 20:55:14,474 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 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 20:55:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:17,149 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-11-02 20:55:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:55:17,150 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 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 20:55:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:17,151 INFO L225 Difference]: With dead ends: 79 [2022-11-02 20:55:17,151 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:55:17,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4430 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=964, Invalid=10801, Unknown=7, NotChecked=0, Total=11772 [2022-11-02 20:55:17,158 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:17,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 818 Invalid, 0 Unknown, 572 Unchecked, 0.8s Time] [2022-11-02 20:55:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:55:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-11-02 20:55:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 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 20:55:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-11-02 20:55:17,188 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-11-02 20:55:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:17,191 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-11-02 20:55:17,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 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 20:55:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-11-02 20:55:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:55:17,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:17,198 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:17,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:17,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:55:17,425 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2022-11-02 20:55:17,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:17,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48047273] [2022-11-02 20:55:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:17,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:55:17,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48047273] [2022-11-02 20:55:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48047273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385721003] [2022-11-02 20:55:17,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:55:17,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:17,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:17,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:17,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:55:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:17,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:55:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:55:17,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:55:17,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385721003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:17,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:17,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-02 20:55:17,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572845704] [2022-11-02 20:55:17,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:17,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:55:17,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:55:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:55:17,942 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 20:55:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:18,202 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-11-02 20:55:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:55:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 47 [2022-11-02 20:55:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:18,204 INFO L225 Difference]: With dead ends: 132 [2022-11-02 20:55:18,204 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 20:55:18,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:55:18,205 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:18,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 63 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 20:55:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-11-02 20:55:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 20:55:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-11-02 20:55:18,219 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2022-11-02 20:55:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:18,220 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-11-02 20:55:18,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 20:55:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-11-02 20:55:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:55:18,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:18,221 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:18,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:18,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:55:18,437 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2022-11-02 20:55:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316967681] [2022-11-02 20:55:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:55:18,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316967681] [2022-11-02 20:55:18,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316967681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289646389] [2022-11-02 20:55:18,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:55:18,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:18,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:18,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:55:18,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:55:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:55:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:55:18,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:55:18,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289646389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:18,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:18,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-02 20:55:18,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987651899] [2022-11-02 20:55:18,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:18,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:55:18,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:55:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:55:18,878 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 20:55:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:19,104 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-11-02 20:55:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:55:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 20:55:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:19,105 INFO L225 Difference]: With dead ends: 101 [2022-11-02 20:55:19,105 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:55:19,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:55:19,106 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:19,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:55:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-11-02 20:55:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 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 20:55:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-11-02 20:55:19,114 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-11-02 20:55:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:19,115 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-11-02 20:55:19,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 20:55:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-11-02 20:55:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:55:19,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:19,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:19,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:19,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:55:19,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-11-02 20:55:19,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:19,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657019881] [2022-11-02 20:55:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:19,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:24,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657019881] [2022-11-02 20:55:24,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657019881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:24,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621820373] [2022-11-02 20:55:24,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:24,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:24,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:24,731 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:24,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:55:24,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 20:55:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-02 20:55:24,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:24,911 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 15 treesize of output 11 [2022-11-02 20:55:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:32,621 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:32,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 47 [2022-11-02 20:55:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:55:33,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:55:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621820373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:53,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:53,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 38] total 116 [2022-11-02 20:55:53,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959693120] [2022-11-02 20:55:53,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:53,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-02 20:55:53,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:53,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-02 20:55:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=12695, Unknown=1, NotChecked=0, Total=13340 [2022-11-02 20:55:53,506 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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 20:56:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:06,082 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-11-02 20:56:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 20:56:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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 20:56:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:06,084 INFO L225 Difference]: With dead ends: 93 [2022-11-02 20:56:06,084 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 20:56:06,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6665 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=1351, Invalid=26038, Unknown=1, NotChecked=0, Total=27390 [2022-11-02 20:56:06,090 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 910 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:06,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 215 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 628 Invalid, 0 Unknown, 910 Unchecked, 0.6s Time] [2022-11-02 20:56:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 20:56:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-11-02 20:56:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 20:56:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-11-02 20:56:06,107 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2022-11-02 20:56:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:06,107 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-11-02 20:56:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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 20:56:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-11-02 20:56:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:56:06,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:06,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:06,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:56:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:56:06,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2022-11-02 20:56:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:06,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155763653] [2022-11-02 20:56:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:56:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:06,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155763653] [2022-11-02 20:56:06,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155763653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:06,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272475505] [2022-11-02 20:56:06,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:56:06,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:06,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:06,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:56:06,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:56:06,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:56:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:56:06,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:56:06,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272475505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:06,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:06,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-02 20:56:06,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222990049] [2022-11-02 20:56:06,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:06,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:56:06,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:56:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:56:06,962 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 20:56:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:07,275 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2022-11-02 20:56:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:56:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 57 [2022-11-02 20:56:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:07,277 INFO L225 Difference]: With dead ends: 160 [2022-11-02 20:56:07,277 INFO L226 Difference]: Without dead ends: 84 [2022-11-02 20:56:07,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:56:07,278 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:07,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 66 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-02 20:56:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-02 20:56:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 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 20:56:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-11-02 20:56:07,294 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 57 [2022-11-02 20:56:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:07,294 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-11-02 20:56:07,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 20:56:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-11-02 20:56:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:56:07,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:07,295 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:07,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:07,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:56:07,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:07,510 INFO L85 PathProgramCache]: Analyzing trace with hash -801227688, now seen corresponding path program 11 times [2022-11-02 20:56:07,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:07,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386406364] [2022-11-02 20:56:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:56:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386406364] [2022-11-02 20:56:07,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386406364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717032036] [2022-11-02 20:56:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:56:07,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:07,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:56:07,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-02 20:56:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:07,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:56:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:56:08,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:56:08,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717032036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:08,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:08,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-02 20:56:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252977976] [2022-11-02 20:56:08,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:08,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:56:08,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:56:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:56:08,147 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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 20:56:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:08,443 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2022-11-02 20:56:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:56:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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 59 [2022-11-02 20:56:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:08,445 INFO L225 Difference]: With dead ends: 119 [2022-11-02 20:56:08,445 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 20:56:08,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:56:08,446 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:08,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 24 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 20:56:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-11-02 20:56:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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 20:56:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-11-02 20:56:08,460 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-11-02 20:56:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:08,461 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-11-02 20:56:08,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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 20:56:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-11-02 20:56:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:56:08,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:08,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:08,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:08,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:56:08,665 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:08,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2022-11-02 20:56:08,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:08,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119053828] [2022-11-02 20:56:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:08,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:14,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119053828] [2022-11-02 20:56:14,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119053828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:14,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886057836] [2022-11-02 20:56:14,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:56:14,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:14,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:14,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:56:14,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-02 20:56:14,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:14,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-02 20:56:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:22,680 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:22,680 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 17 treesize of output 18 [2022-11-02 20:56:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:56:23,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:55,263 INFO L356 Elim1Store]: treesize reduction 102, result has 72.7 percent of original size [2022-11-02 20:56:55,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 285 [2022-11-02 20:56:56,393 INFO L356 Elim1Store]: treesize reduction 306, result has 18.0 percent of original size [2022-11-02 20:56:56,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 82 [2022-11-02 20:56:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:56:57,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886057836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:57,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:57,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 46] total 141 [2022-11-02 20:56:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268668523] [2022-11-02 20:56:57,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:57,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-11-02 20:56:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-11-02 20:56:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=18981, Unknown=0, NotChecked=0, Total=19740 [2022-11-02 20:56:57,095 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 141 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 141 states have internal predecessors, (175), 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 20:57:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:13,158 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-11-02 20:57:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 20:57:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 141 states have internal predecessors, (175), 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 20:57:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:13,160 INFO L225 Difference]: With dead ends: 109 [2022-11-02 20:57:13,160 INFO L226 Difference]: Without dead ends: 105 [2022-11-02 20:57:13,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9238 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=1531, Invalid=37871, Unknown=0, NotChecked=0, Total=39402 [2022-11-02 20:57:13,165 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1578 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:13,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 260 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1180 Invalid, 0 Unknown, 1578 Unchecked, 1.1s Time] [2022-11-02 20:57:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-02 20:57:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-11-02 20:57:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 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 20:57:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-11-02 20:57:13,183 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2022-11-02 20:57:13,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:13,184 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-11-02 20:57:13,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 141 states have internal predecessors, (175), 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 20:57:13,184 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-11-02 20:57:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:57:13,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:13,185 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:13,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:57:13,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:13,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2022-11-02 20:57:13,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:13,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572811604] [2022-11-02 20:57:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-02 20:57:13,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:13,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572811604] [2022-11-02 20:57:13,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572811604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:13,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017937368] [2022-11-02 20:57:13,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:57:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:13,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:13,635 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:13,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:57:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:13,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:57:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-02 20:57:13,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-02 20:57:14,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017937368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:14,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:14,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-02 20:57:14,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063967256] [2022-11-02 20:57:14,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:14,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:57:14,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:57:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:57:14,099 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 20:57:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:14,468 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2022-11-02 20:57:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:57:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 67 [2022-11-02 20:57:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:14,469 INFO L225 Difference]: With dead ends: 188 [2022-11-02 20:57:14,469 INFO L226 Difference]: Without dead ends: 98 [2022-11-02 20:57:14,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:57:14,471 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:14,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 57 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:57:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-02 20:57:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-11-02 20:57:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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 20:57:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-11-02 20:57:14,516 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 67 [2022-11-02 20:57:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:14,516 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-11-02 20:57:14,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 20:57:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-11-02 20:57:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:57:14,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:14,517 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:14,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:14,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:57:14,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 721627522, now seen corresponding path program 14 times [2022-11-02 20:57:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188129014] [2022-11-02 20:57:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:57:14,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:14,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188129014] [2022-11-02 20:57:14,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188129014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:14,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668754394] [2022-11-02 20:57:14,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:57:14,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:14,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:14,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:57:15,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:57:15,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:57:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:57:15,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:57:15,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668754394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:15,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:15,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-02 20:57:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724386248] [2022-11-02 20:57:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:15,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:57:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:57:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:57:15,368 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 20:57:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:15,690 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-11-02 20:57:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:57:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 69 [2022-11-02 20:57:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:15,691 INFO L225 Difference]: With dead ends: 137 [2022-11-02 20:57:15,691 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:57:15,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:57:15,692 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:15,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 29 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:57:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:57:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-11-02 20:57:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 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 20:57:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-11-02 20:57:15,708 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-11-02 20:57:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:15,708 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-11-02 20:57:15,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 20:57:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-11-02 20:57:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:57:15,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:15,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:15,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:15,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:57:15,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:15,910 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2022-11-02 20:57:15,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002771781] [2022-11-02 20:57:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:15,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002771781] [2022-11-02 20:57:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002771781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696945339] [2022-11-02 20:57:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:57:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:25,231 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:25,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa20f5d-7c69-42e0-9bee-bc79f0f1ac4b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:57:25,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-02 20:57:25,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:25,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-02 20:57:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:25,514 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 15 treesize of output 11 [2022-11-02 20:57:42,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:42,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:42,532 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:57:42,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 89 [2022-11-02 20:57:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:57:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates...