./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --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_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/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_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/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_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- 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 20:16:17,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:16:17,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:16:17,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:16:17,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:16:17,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:16:17,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:16:17,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:16:17,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:16:17,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:16:17,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:16:17,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:16:17,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:16:17,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:16:17,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:16:17,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:16:17,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:16:17,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:16:17,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:16:17,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:16:17,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:16:17,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:16:17,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:16:17,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:16:17,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:16:17,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:16:17,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:16:17,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:16:17,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:16:17,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:16:17,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:16:17,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:16:17,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:16:17,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:16:17,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:16:17,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:16:17,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:16:17,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:16:17,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:16:17,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:16:17,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:16:17,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:16:17,668 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:16:17,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:16:17,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:16:17,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:16:17,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:16:17,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:16:17,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:16:17,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:16:17,672 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:16:17,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:16:17,672 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:16:17,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:16:17,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:16:17,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:16:17,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:16:17,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:16:17,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:16:17,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:16:17,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:16:17,674 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:16:17,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:16:17,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:16:17,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:16:17,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:16:17,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:16:17,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:16:17,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:16:17,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:16:17,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:16:17,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:16:17,677 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:16:17,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:16:17,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:16:17,678 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_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2022-11-02 20:16:18,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:16:18,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:16:18,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:16:18,062 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:16:18,063 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:16:18,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-02 20:16:18,143 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/data/bfafdb679/0772097880484775bedabca268174243/FLAG2edeb70ed [2022-11-02 20:16:18,776 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:16:18,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-02 20:16:18,790 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/data/bfafdb679/0772097880484775bedabca268174243/FLAG2edeb70ed [2022-11-02 20:16:19,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/data/bfafdb679/0772097880484775bedabca268174243 [2022-11-02 20:16:19,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:16:19,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:16:19,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:16:19,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:16:19,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:16:19,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a92b549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19, skipping insertion in model container [2022-11-02 20:16:19,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:16:19,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:16:19,424 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_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-02 20:16:19,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:16:19,463 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:16:19,482 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_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-02 20:16:19,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:16:19,531 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:16:19,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19 WrapperNode [2022-11-02 20:16:19,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:16:19,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:16:19,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:16:19,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:16:19,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,586 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-02 20:16:19,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:16:19,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:16:19,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:16:19,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:16:19,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,632 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:16:19,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:16:19,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:16:19,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:16:19,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (1/1) ... [2022-11-02 20:16:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:16:19,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:19,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:16:19,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:16:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:16:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:16:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:16:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:16:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:16:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:16:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:16:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:16:19,849 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:16:19,852 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:16:20,105 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:16:20,127 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:16:20,127 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-02 20:16:20,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:16:20 BoogieIcfgContainer [2022-11-02 20:16:20,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:16:20,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:16:20,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:16:20,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:16:20,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:16:19" (1/3) ... [2022-11-02 20:16:20,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4deded00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:16:20, skipping insertion in model container [2022-11-02 20:16:20,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:16:19" (2/3) ... [2022-11-02 20:16:20,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4deded00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:16:20, skipping insertion in model container [2022-11-02 20:16:20,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:16:20" (3/3) ... [2022-11-02 20:16:20,152 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2022-11-02 20:16:20,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:16:20,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:16:20,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:16:20,288 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;@7f2b6ef3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:16:20,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:16:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 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 20:16:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:16:20,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:20,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:20,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:20,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2022-11-02 20:16:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:20,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567653507] [2022-11-02 20:16:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:20,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:20,565 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 20:16:20,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:20,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567653507] [2022-11-02 20:16:20,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567653507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:16:20,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:16:20,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:16:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11940910] [2022-11-02 20:16:20,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:16:20,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:16:20,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:16:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:16:20,614 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 20:16:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:20,688 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2022-11-02 20:16:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:16:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-11-02 20:16:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:20,702 INFO L225 Difference]: With dead ends: 44 [2022-11-02 20:16:20,703 INFO L226 Difference]: Without dead ends: 21 [2022-11-02 20:16:20,708 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 20:16:20,715 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:20,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:16:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-02 20:16:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-02 20:16:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 20:16:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-02 20:16:20,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2022-11-02 20:16:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:20,763 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-02 20:16:20,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 20:16:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-02 20:16:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:16:20,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:20,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:16:20,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2022-11-02 20:16:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:20,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481401377] [2022-11-02 20:16:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:16:20,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:20,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481401377] [2022-11-02 20:16:20,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481401377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907630295] [2022-11-02 20:16:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:20,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:20,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:20,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:16:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:16:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:21,131 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 20:16:21,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:16:21,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907630295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:16:21,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:16:21,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-02 20:16:21,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960248607] [2022-11-02 20:16:21,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:16:21,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:16:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:16:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:16:21,160 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 20:16:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:21,273 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-02 20:16:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:16:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-11-02 20:16:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:21,277 INFO L225 Difference]: With dead ends: 35 [2022-11-02 20:16:21,277 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:16:21,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:16:21,279 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:21,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:16:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:16:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-02 20:16:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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 20:16:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-02 20:16:21,285 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-11-02 20:16:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:21,286 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-02 20:16:21,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 20:16:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-02 20:16:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:16:21,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:21,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:21,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:16:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-02 20:16:21,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2022-11-02 20:16:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:21,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398356940] [2022-11-02 20:16:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:21,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:16:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:21,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398356940] [2022-11-02 20:16:21,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398356940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:21,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981130029] [2022-11-02 20:16:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:21,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:21,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:21,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:16:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:21,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:16:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:16:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:16:21,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981130029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:21,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:16:21,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:16:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413521877] [2022-11-02 20:16:21,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:16:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:16:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:16:21,787 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 20:16:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:21,870 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-11-02 20:16:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:16:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 20:16:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:21,872 INFO L225 Difference]: With dead ends: 71 [2022-11-02 20:16:21,872 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 20:16:21,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:16:21,874 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:21,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 62 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:16:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 20:16:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 27. [2022-11-02 20:16:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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 20:16:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-02 20:16:21,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2022-11-02 20:16:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:21,883 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-02 20:16:21,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 20:16:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-02 20:16:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:16:21,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:21,884 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:21,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:22,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:22,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 515426679, now seen corresponding path program 2 times [2022-11-02 20:16:22,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330867727] [2022-11-02 20:16:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:16:22,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330867727] [2022-11-02 20:16:22,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330867727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:16:22,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:16:22,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:16:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220685353] [2022-11-02 20:16:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:16:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:16:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:16:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:16:22,273 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 20:16:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:22,321 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-11-02 20:16:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:16:22,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 21 [2022-11-02 20:16:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:22,323 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:16:22,323 INFO L226 Difference]: Without dead ends: 34 [2022-11-02 20:16:22,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:16:22,325 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:22,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:16:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-02 20:16:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-02 20:16:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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 20:16:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-02 20:16:22,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2022-11-02 20:16:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:22,333 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-02 20:16:22,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 20:16:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-02 20:16:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:16:22,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:22,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:16:22,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1658369263, now seen corresponding path program 1 times [2022-11-02 20:16:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:22,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956258791] [2022-11-02 20:16:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:16:22,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:22,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956258791] [2022-11-02 20:16:22,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956258791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:22,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547177904] [2022-11-02 20:16:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:22,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:22,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:16:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:16:22,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:16:22,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:16:22,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547177904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:23,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:16:23,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-02 20:16:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807181832] [2022-11-02 20:16:23,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:23,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:16:23,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:16:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:16:23,003 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 20:16:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:23,497 INFO L93 Difference]: Finished difference Result 97 states and 136 transitions. [2022-11-02 20:16:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:16:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 24 [2022-11-02 20:16:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:23,506 INFO L225 Difference]: With dead ends: 97 [2022-11-02 20:16:23,506 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:16:23,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:16:23,511 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 253 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:23,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 76 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:16:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:16:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-02 20:16:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 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 20:16:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2022-11-02 20:16:23,557 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2022-11-02 20:16:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:23,559 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2022-11-02 20:16:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 20:16:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2022-11-02 20:16:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:16:23,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:23,564 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:23,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 20:16:23,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:23,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:23,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1935549725, now seen corresponding path program 2 times [2022-11-02 20:16:23,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:23,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734843936] [2022-11-02 20:16:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:23,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:16:24,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:24,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734843936] [2022-11-02 20:16:24,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734843936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411797145] [2022-11-02 20:16:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:16:24,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:24,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:24,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:16:24,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:16:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:16:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:16:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:16:24,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:16:24,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411797145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:24,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:16:24,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-02 20:16:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144655366] [2022-11-02 20:16:24,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:24,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:16:24,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:16:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:16:24,938 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 20:16:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:25,288 INFO L93 Difference]: Finished difference Result 329 states and 430 transitions. [2022-11-02 20:16:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:16:25,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 60 [2022-11-02 20:16:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:25,292 INFO L225 Difference]: With dead ends: 329 [2022-11-02 20:16:25,292 INFO L226 Difference]: Without dead ends: 272 [2022-11-02 20:16:25,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:16:25,294 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 587 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:25,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 256 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:16:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-02 20:16:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 104. [2022-11-02 20:16:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 103 states have internal predecessors, (125), 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 20:16:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-11-02 20:16:25,319 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 60 [2022-11-02 20:16:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:25,320 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-11-02 20:16:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 20:16:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-11-02 20:16:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:16:25,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:25,323 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:25,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:25,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:16:25,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1156211659, now seen corresponding path program 3 times [2022-11-02 20:16:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:25,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763295559] [2022-11-02 20:16:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:16:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:26,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763295559] [2022-11-02 20:16:26,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763295559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:26,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393615113] [2022-11-02 20:16:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:16:26,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:26,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:16:26,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:16:26,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:16:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:16:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-11-02 20:16:26,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:16:26,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393615113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:16:26,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:16:26,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2022-11-02 20:16:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854320252] [2022-11-02 20:16:26,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:16:26,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:16:26,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:16:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:16:26,752 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:16:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:26,898 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2022-11-02 20:16:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:16:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:16:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:26,900 INFO L225 Difference]: With dead ends: 193 [2022-11-02 20:16:26,900 INFO L226 Difference]: Without dead ends: 184 [2022-11-02 20:16:26,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:16:26,903 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:26,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 68 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:16:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-02 20:16:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2022-11-02 20:16:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 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 20:16:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2022-11-02 20:16:26,928 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 84 [2022-11-02 20:16:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:26,929 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2022-11-02 20:16:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:16:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2022-11-02 20:16:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:16:26,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:26,931 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:26,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:27,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:16:27,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1290299501, now seen corresponding path program 4 times [2022-11-02 20:16:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984513431] [2022-11-02 20:16:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:27,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-02 20:16:28,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:28,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984513431] [2022-11-02 20:16:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984513431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216996127] [2022-11-02 20:16:28,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:16:28,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:28,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:28,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:28,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:16:28,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:16:28,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:16:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:16:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-02 20:16:28,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-02 20:16:29,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216996127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:29,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:16:29,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-02 20:16:29,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533223616] [2022-11-02 20:16:29,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:29,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:16:29,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:29,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:16:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:16:29,305 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 20:16:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:30,431 INFO L93 Difference]: Finished difference Result 825 states and 1072 transitions. [2022-11-02 20:16:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:16:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 87 [2022-11-02 20:16:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:30,437 INFO L225 Difference]: With dead ends: 825 [2022-11-02 20:16:30,438 INFO L226 Difference]: Without dead ends: 767 [2022-11-02 20:16:30,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:16:30,440 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2302 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:30,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 581 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:16:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-02 20:16:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 153. [2022-11-02 20:16:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 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 20:16:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2022-11-02 20:16:30,489 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 87 [2022-11-02 20:16:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:30,492 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2022-11-02 20:16:30,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 20:16:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2022-11-02 20:16:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-02 20:16:30,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:30,504 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:30,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:30,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1107291293, now seen corresponding path program 5 times [2022-11-02 20:16:30,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039494399] [2022-11-02 20:16:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-02 20:16:33,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:33,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039494399] [2022-11-02 20:16:33,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039494399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698907201] [2022-11-02 20:16:33,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:16:33,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:33,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:33,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:17:03,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-11-02 20:17:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:17:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:17:03,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2022-11-02 20:17:03,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:17:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2022-11-02 20:17:03,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698907201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:17:03,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:17:03,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8, 8] total 60 [2022-11-02 20:17:03,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006606088] [2022-11-02 20:17:03,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:17:03,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-02 20:17:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-02 20:17:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2308, Unknown=0, NotChecked=0, Total=3540 [2022-11-02 20:17:03,573 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 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 20:17:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:13,816 INFO L93 Difference]: Finished difference Result 913 states and 1240 transitions. [2022-11-02 20:17:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-02 20:17:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 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 135 [2022-11-02 20:17:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:13,821 INFO L225 Difference]: With dead ends: 913 [2022-11-02 20:17:13,821 INFO L226 Difference]: Without dead ends: 855 [2022-11-02 20:17:13,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19097 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=17074, Invalid=42218, Unknown=0, NotChecked=0, Total=59292 [2022-11-02 20:17:13,846 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4729 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 1256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4729 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:13,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4729 Valid, 589 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1256 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:17:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-02 20:17:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 180. [2022-11-02 20:17:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 179 states have internal predecessors, (207), 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 20:17:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-11-02 20:17:13,877 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 135 [2022-11-02 20:17:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:13,878 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-11-02 20:17:13,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 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 20:17:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-11-02 20:17:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-02 20:17:13,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:13,880 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:13,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:17:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:14,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1557114873, now seen corresponding path program 6 times [2022-11-02 20:17:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:14,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26309173] [2022-11-02 20:17:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-11-02 20:17:16,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26309173] [2022-11-02 20:17:16,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26309173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:17:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459526489] [2022-11-02 20:17:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:17:16,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:16,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:16,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:17:17,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-02 20:17:17,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:17:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:17:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2022-11-02 20:17:17,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:17:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2022-11-02 20:17:17,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459526489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:17:17,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:17:17,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 8, 8] total 61 [2022-11-02 20:17:17,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702730523] [2022-11-02 20:17:17,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:17:17,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-02 20:17:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-02 20:17:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1519, Invalid=2141, Unknown=0, NotChecked=0, Total=3660 [2022-11-02 20:17:17,822 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 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 20:17:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:33,403 INFO L93 Difference]: Finished difference Result 1364 states and 1911 transitions. [2022-11-02 20:17:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2022-11-02 20:17:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 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 176 [2022-11-02 20:17:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:33,408 INFO L225 Difference]: With dead ends: 1364 [2022-11-02 20:17:33,409 INFO L226 Difference]: Without dead ends: 1232 [2022-11-02 20:17:33,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47559 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=27227, Invalid=96325, Unknown=0, NotChecked=0, Total=123552 [2022-11-02 20:17:33,423 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4279 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4279 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1584 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:33,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4279 Valid, 202 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1584 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 20:17:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-02 20:17:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 706. [2022-11-02 20:17:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.3574468085106384) internal successors, (957), 705 states have internal predecessors, (957), 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 20:17:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 957 transitions. [2022-11-02 20:17:33,716 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 957 transitions. Word has length 176 [2022-11-02 20:17:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:33,717 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 957 transitions. [2022-11-02 20:17:33,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 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 20:17:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 957 transitions. [2022-11-02 20:17:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-11-02 20:17:33,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:33,735 INFO L195 NwaCegarLoop]: trace histogram [143, 143, 143, 50, 50, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:33,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:17:33,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:17:33,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:33,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash -658164028, now seen corresponding path program 7 times [2022-11-02 20:17:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:33,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711140073] [2022-11-02 20:17:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-02 20:17:39,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:39,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711140073] [2022-11-02 20:17:39,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711140073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:17:39,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066303048] [2022-11-02 20:17:39,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:17:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:39,928 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:39,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:17:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:40,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:17:40,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-02 20:17:40,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:17:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-02 20:17:44,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066303048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:17:44,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:17:44,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-11-02 20:17:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421506291] [2022-11-02 20:17:44,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:17:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-02 20:17:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-02 20:17:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-02 20:17:44,017 INFO L87 Difference]: Start difference. First operand 706 states and 957 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 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 20:18:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:05,265 INFO L93 Difference]: Finished difference Result 44922 states and 63580 transitions. [2022-11-02 20:18:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-02 20:18:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 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 683 [2022-11-02 20:18:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:05,382 INFO L225 Difference]: With dead ends: 44922 [2022-11-02 20:18:05,382 INFO L226 Difference]: Without dead ends: 44319 [2022-11-02 20:18:05,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1314 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-02 20:18:05,396 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5005 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5005 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:05,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5005 Valid, 998 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:18:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44319 states. [2022-11-02 20:18:06,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44319 to 810. [2022-11-02 20:18:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.311495673671199) internal successors, (1061), 809 states have internal predecessors, (1061), 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 20:18:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1061 transitions. [2022-11-02 20:18:06,252 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1061 transitions. Word has length 683 [2022-11-02 20:18:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:06,252 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1061 transitions. [2022-11-02 20:18:06,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 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 20:18:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1061 transitions. [2022-11-02 20:18:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2022-11-02 20:18:06,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:06,279 INFO L195 NwaCegarLoop]: trace histogram [143, 143, 143, 102, 102, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:06,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:18:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:18:06,507 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1077196708, now seen corresponding path program 8 times [2022-11-02 20:18:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668055177] [2022-11-02 20:18:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-02 20:18:19,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:19,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668055177] [2022-11-02 20:18:19,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668055177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:18:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100028824] [2022-11-02 20:18:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:18:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:18:19,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:18:19,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e088b0-1d00-44f0-9fd9-799ee1f59bfc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:18:19,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:18:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:18:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-02 20:18:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:18:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-02 20:18:20,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:18:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-02 20:18:34,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100028824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:18:34,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:18:34,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 209 [2022-11-02 20:18:34,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013014837] [2022-11-02 20:18:34,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:18:34,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2022-11-02 20:18:34,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2022-11-02 20:18:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2022-11-02 20:18:34,236 INFO L87 Difference]: Start difference. First operand 810 states and 1061 transitions. Second operand has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 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)