./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_password_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_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/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_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_password_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/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_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/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 3cb77685c99da394e56759788276300560cc521e5b9b98850714a1baff20c383 --- 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 21:00:18,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:00:18,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:00:18,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:00:18,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:00:18,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:00:18,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:00:18,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:00:18,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:00:18,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:00:18,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:00:18,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:00:18,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:00:18,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:00:18,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:00:18,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:00:18,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:00:18,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:00:18,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:00:18,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:00:18,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:00:18,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:00:18,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:00:18,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:00:18,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:00:18,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:00:18,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:00:18,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:00:18,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:00:18,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:00:18,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:00:18,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:00:18,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:00:18,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:00:18,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:00:18,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:00:18,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:00:18,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:00:18,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:00:18,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:00:18,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:00:18,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:00:18,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:00:18,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:00:18,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:00:18,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:00:18,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:00:18,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:00:18,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:00:18,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:00:18,815 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:00:18,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:00:18,816 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:00:18,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:00:18,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:00:18,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:00:18,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:00:18,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:00:18,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:00:18,818 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:00:18,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:00:18,819 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:00:18,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:00:18,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:00:18,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:00:18,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:00:18,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:18,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:00:18,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:00:18,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:00:18,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:00:18,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:00:18,822 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:00:18,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:00:18,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:00:18,823 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_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cb77685c99da394e56759788276300560cc521e5b9b98850714a1baff20c383 [2022-11-02 21:00:19,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:00:19,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:00:19,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:00:19,179 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:00:19,180 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:00:19,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-examples/standard_password_ground.i [2022-11-02 21:00:19,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/data/bd0a556db/397ea583caf5431c8e6fbc8f15587f00/FLAGd18d5ed94 [2022-11-02 21:00:19,910 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:00:19,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/sv-benchmarks/c/array-examples/standard_password_ground.i [2022-11-02 21:00:19,919 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/data/bd0a556db/397ea583caf5431c8e6fbc8f15587f00/FLAGd18d5ed94 [2022-11-02 21:00:20,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/data/bd0a556db/397ea583caf5431c8e6fbc8f15587f00 [2022-11-02 21:00:20,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:00:20,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:00:20,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:20,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:00:20,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:00:20,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a17ca41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20, skipping insertion in model container [2022-11-02 21:00:20,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:00:20,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:00:20,495 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_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/sv-benchmarks/c/array-examples/standard_password_ground.i[817,830] [2022-11-02 21:00:20,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:20,521 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:00:20,537 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_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/sv-benchmarks/c/array-examples/standard_password_ground.i[817,830] [2022-11-02 21:00:20,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:20,575 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:00:20,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20 WrapperNode [2022-11-02 21:00:20,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:20,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:20,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:00:20,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:00:20,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,620 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2022-11-02 21:00:20,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:20,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:00:20,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:00:20,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:00:20,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:00:20,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:00:20,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:00:20,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:00:20,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (1/1) ... [2022-11-02 21:00:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:20,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:00:20,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:00:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:00:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:00:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:00:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:00:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:00:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:00:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:00:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:00:20,826 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:00:20,828 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:00:21,030 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:00:21,036 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:00:21,037 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:00:21,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:21 BoogieIcfgContainer [2022-11-02 21:00:21,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:00:21,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:00:21,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:00:21,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:00:21,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:00:20" (1/3) ... [2022-11-02 21:00:21,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b181d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:21, skipping insertion in model container [2022-11-02 21:00:21,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:20" (2/3) ... [2022-11-02 21:00:21,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b181d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:21, skipping insertion in model container [2022-11-02 21:00:21,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:21" (3/3) ... [2022-11-02 21:00:21,051 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2022-11-02 21:00:21,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:00:21,071 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:00:21,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:00:21,163 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;@6bb1ebdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:00:21,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:00:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 21:00:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 21:00:21,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:21,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:21,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:21,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2006075616, now seen corresponding path program 1 times [2022-11-02 21:00:21,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920936424] [2022-11-02 21:00:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:21,555 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 21:00:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:21,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920936424] [2022-11-02 21:00:21,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920936424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:21,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:21,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:00:21,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36736900] [2022-11-02 21:00:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:00:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:00:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:00:21,655 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:00:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:21,750 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2022-11-02 21:00:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:00:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-11-02 21:00:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:21,767 INFO L225 Difference]: With dead ends: 39 [2022-11-02 21:00:21,768 INFO L226 Difference]: Without dead ends: 20 [2022-11-02 21:00:21,772 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 21:00:21,782 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:21,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-02 21:00:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-02 21:00:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 21:00:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-02 21:00:21,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-11-02 21:00:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:21,836 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-02 21:00:21,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:00:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-02 21:00:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:00:21,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:21,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:21,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:00:21,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -324076335, now seen corresponding path program 1 times [2022-11-02 21:00:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:21,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523252424] [2022-11-02 21:00:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:22,057 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 21:00:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:22,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523252424] [2022-11-02 21:00:22,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523252424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517982022] [2022-11-02 21:00:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:22,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:22,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:22,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:00:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:00:22,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:22,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517982022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:22,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:00:22,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:00:22,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710135553] [2022-11-02 21:00:22,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:00:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:00:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:22,227 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 21:00:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:22,249 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-02 21:00:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:00:22,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-11-02 21:00:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:22,252 INFO L225 Difference]: With dead ends: 27 [2022-11-02 21:00:22,256 INFO L226 Difference]: Without dead ends: 17 [2022-11-02 21:00:22,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:22,259 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:22,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:00:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-02 21:00:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-02 21:00:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 21:00:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-02 21:00:22,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-11-02 21:00:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:22,276 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-02 21:00:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 21:00:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-02 21:00:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:00:22,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:22,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:22,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:22,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1450931027, now seen corresponding path program 1 times [2022-11-02 21:00:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:22,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135907594] [2022-11-02 21:00:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:22,631 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 21:00:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135907594] [2022-11-02 21:00:22,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135907594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923800418] [2022-11-02 21:00:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:22,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:22,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:22,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:00:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:22,755 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 21:00:22,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:22,785 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 21:00:22,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923800418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:22,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:22,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 21:00:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817815571] [2022-11-02 21:00:22,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:22,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:00:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:00:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:00:22,788 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:00:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:22,841 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-11-02 21:00:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:00:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 14 [2022-11-02 21:00:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:22,843 INFO L225 Difference]: With dead ends: 44 [2022-11-02 21:00:22,843 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 21:00:22,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 21:00:22,844 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:22,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:00:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 21:00:22,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-02 21:00:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-11-02 21:00:22,850 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 14 [2022-11-02 21:00:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:22,850 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-11-02 21:00:22,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:00:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-11-02 21:00:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 21:00:22,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:22,852 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:22,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:23,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:23,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 443135373, now seen corresponding path program 2 times [2022-11-02 21:00:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889499700] [2022-11-02 21:00:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:23,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889499700] [2022-11-02 21:00:23,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889499700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:23,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095638530] [2022-11-02 21:00:23,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:23,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:23,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:00:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:00:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:23,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:23,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095638530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:23,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:23,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-02 21:00:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820321208] [2022-11-02 21:00:23,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:00:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:00:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:00:23,630 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 21:00:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:23,759 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-11-02 21:00:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:00:23,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) Word has length 29 [2022-11-02 21:00:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:23,765 INFO L225 Difference]: With dead ends: 83 [2022-11-02 21:00:23,765 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 21:00:23,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:00:23,772 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:23,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 21:00:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-02 21:00:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 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 21:00:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-11-02 21:00:23,788 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 29 [2022-11-02 21:00:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:23,788 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-11-02 21:00:23,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 21:00:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-11-02 21:00:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:00:23,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:23,790 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:23,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:24,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:24,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1764901633, now seen corresponding path program 3 times [2022-11-02 21:00:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:24,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113537221] [2022-11-02 21:00:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-02 21:00:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113537221] [2022-11-02 21:00:24,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113537221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386589084] [2022-11-02 21:00:24,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:00:24,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:24,481 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:24,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:00:24,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:00:24,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 21:00:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-02 21:00:25,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:25,572 INFO L356 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-02 21:00:25,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-11-02 21:00:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-02 21:00:25,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386589084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:25,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:25,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 22 [2022-11-02 21:00:25,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541210379] [2022-11-02 21:00:25,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:25,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:00:25,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:00:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:00:25,620 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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 21:00:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:26,290 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-11-02 21:00:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 21:00:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-02 21:00:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:26,292 INFO L225 Difference]: With dead ends: 114 [2022-11-02 21:00:26,292 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 21:00:26,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 21:00:26,294 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:26,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 76 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 21:00:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-11-02 21:00:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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 21:00:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-11-02 21:00:26,303 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2022-11-02 21:00:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:26,304 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-11-02 21:00:26,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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 21:00:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-11-02 21:00:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:00:26,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:26,306 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:26,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:26,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:26,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash -294095331, now seen corresponding path program 1 times [2022-11-02 21:00:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:26,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138782535] [2022-11-02 21:00:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-02 21:00:26,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138782535] [2022-11-02 21:00:26,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138782535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398492029] [2022-11-02 21:00:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:26,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:26,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:27,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:00:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:00:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-02 21:00:27,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-02 21:00:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398492029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:27,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:27,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-02 21:00:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528924105] [2022-11-02 21:00:27,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:27,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:00:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:00:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:00:27,499 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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 21:00:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:27,752 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2022-11-02 21:00:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:00:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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 68 [2022-11-02 21:00:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:27,754 INFO L225 Difference]: With dead ends: 178 [2022-11-02 21:00:27,754 INFO L226 Difference]: Without dead ends: 134 [2022-11-02 21:00:27,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:00:27,755 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:27,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 45 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-02 21:00:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-02 21:00:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-11-02 21:00:27,771 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 68 [2022-11-02 21:00:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:27,772 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-11-02 21:00:27,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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 21:00:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-11-02 21:00:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-02 21:00:27,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:27,775 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:27,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 21:00:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:00:27,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1900697445, now seen corresponding path program 2 times [2022-11-02 21:00:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112869638] [2022-11-02 21:00:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-11-02 21:00:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112869638] [2022-11-02 21:00:29,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112869638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:29,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530234931] [2022-11-02 21:00:29,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:29,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:29,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:29,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:29,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:00:29,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:29,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:29,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 21:00:29,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-11-02 21:00:29,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-11-02 21:00:30,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530234931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:30,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:30,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-02 21:00:30,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907303273] [2022-11-02 21:00:30,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-02 21:00:30,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-02 21:00:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 21:00:30,880 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:31,608 INFO L93 Difference]: Finished difference Result 347 states and 402 transitions. [2022-11-02 21:00:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 21:00:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-02 21:00:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:31,611 INFO L225 Difference]: With dead ends: 347 [2022-11-02 21:00:31,611 INFO L226 Difference]: Without dead ends: 264 [2022-11-02 21:00:31,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 21:00:31,615 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 390 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:31,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 94 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:00:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-02 21:00:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-02 21:00:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 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 21:00:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2022-11-02 21:00:31,667 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 133 [2022-11-02 21:00:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2022-11-02 21:00:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2022-11-02 21:00:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-02 21:00:31,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:31,681 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:31,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:31,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:31,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash 871306471, now seen corresponding path program 3 times [2022-11-02 21:00:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:31,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907409814] [2022-11-02 21:00:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3727 trivial. 0 not checked. [2022-11-02 21:00:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:36,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907409814] [2022-11-02 21:00:36,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907409814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:36,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449575862] [2022-11-02 21:00:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:00:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:36,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:36,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:00:36,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 21:00:36,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 21:00:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 5881 trivial. 0 not checked. [2022-11-02 21:00:38,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:38,960 INFO L356 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2022-11-02 21:00:38,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 54 [2022-11-02 21:00:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6227 backedges. 48 proven. 199 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2022-11-02 21:00:39,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449575862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:39,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:39,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 10, 9] total 66 [2022-11-02 21:00:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258255367] [2022-11-02 21:00:39,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:39,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 21:00:39,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 21:00:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1574, Invalid=2716, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 21:00:39,015 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:44,357 INFO L93 Difference]: Finished difference Result 440 states and 446 transitions. [2022-11-02 21:00:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-02 21:00:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-11-02 21:00:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:44,360 INFO L225 Difference]: With dead ends: 440 [2022-11-02 21:00:44,360 INFO L226 Difference]: Without dead ends: 279 [2022-11-02 21:00:44,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 511 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6378 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8419, Invalid=19637, Unknown=0, NotChecked=0, Total=28056 [2022-11-02 21:00:44,369 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 689 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:44,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 130 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:00:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-02 21:00:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2022-11-02 21:00:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 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 21:00:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-11-02 21:00:44,389 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2022-11-02 21:00:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:44,392 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-11-02 21:00:44,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.393939393939394) internal successors, (158), 66 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-11-02 21:00:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-11-02 21:00:44,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:44,397 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 51, 51, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:44,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:44,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:44,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash -395551069, now seen corresponding path program 4 times [2022-11-02 21:00:44,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:44,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151987481] [2022-11-02 21:00:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3884 trivial. 0 not checked. [2022-11-02 21:00:48,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151987481] [2022-11-02 21:00:48,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151987481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:48,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592759336] [2022-11-02 21:00:48,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:00:48,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:48,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:48,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:00:48,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:00:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 21:00:48,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2022-11-02 21:00:49,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6485 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2022-11-02 21:00:53,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592759336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:53,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:53,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-11-02 21:00:53,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533397373] [2022-11-02 21:00:53,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:53,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-02 21:00:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:53,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-02 21:00:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-11-02 21:00:53,065 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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 21:00:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:55,060 INFO L93 Difference]: Finished difference Result 706 states and 815 transitions. [2022-11-02 21:00:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-02 21:00:55,061 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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 272 [2022-11-02 21:00:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:55,063 INFO L225 Difference]: With dead ends: 706 [2022-11-02 21:00:55,063 INFO L226 Difference]: Without dead ends: 538 [2022-11-02 21:00:55,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-11-02 21:00:55,068 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 629 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:55,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 140 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:00:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-02 21:00:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-11-02 21:00:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.005586592178771) internal successors, (540), 537 states have internal predecessors, (540), 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 21:00:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 540 transitions. [2022-11-02 21:00:55,104 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 540 transitions. Word has length 272 [2022-11-02 21:00:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:55,104 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 540 transitions. [2022-11-02 21:00:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.02803738317757) internal successors, (431), 107 states have internal predecessors, (431), 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 21:00:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 540 transitions. [2022-11-02 21:00:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-11-02 21:00:55,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:55,118 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 104, 104, 104, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:55,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:55,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 21:00:55,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash 129474353, now seen corresponding path program 5 times [2022-11-02 21:00:55,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:55,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826232087] [2022-11-02 21:00:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:55,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26996 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 16180 trivial. 0 not checked. [2022-11-02 21:01:07,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:07,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826232087] [2022-11-02 21:01:07,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826232087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:07,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422282470] [2022-11-02 21:01:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:01:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:07,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:07,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8c27ed-b07f-4b2d-98e1-709e9d4225e5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process