./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/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_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/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 64bit --witnessprinter.graph.data.programhash a13b8423c8adb1016504f40821b85ca260e7a8c1efbef1b406f93b0c69b5f932 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:08:16,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:08:16,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:08:16,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:08:16,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:08:16,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:08:16,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:08:16,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:08:16,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:08:16,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:08:16,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:08:16,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:08:16,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:08:16,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:08:16,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:08:16,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:08:16,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:08:16,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:08:16,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:08:16,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:08:16,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:08:16,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:08:16,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:08:16,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:08:16,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:08:16,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:08:16,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:08:16,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:08:16,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:08:16,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:08:16,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:08:16,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:08:16,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:08:16,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:08:16,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:08:16,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:08:16,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:08:16,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:08:16,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:08:16,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:08:16,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:08:16,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:08:17,030 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:08:17,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:08:17,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:08:17,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:08:17,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:08:17,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:08:17,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:08:17,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:08:17,034 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:08:17,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:08:17,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:08:17,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:08:17,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:08:17,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:08:17,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:08:17,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:08:17,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:08:17,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:08:17,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:08:17,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:08:17,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:08:17,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:08:17,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:08:17,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:08:17,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:08:17,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:08:17,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:08:17,040 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:08:17,041 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:08:17,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:08:17,041 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_014adff8-7f9b-4737-a236-fe7213fdaf0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a13b8423c8adb1016504f40821b85ca260e7a8c1efbef1b406f93b0c69b5f932 [2022-11-02 20:08:17,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:08:17,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:08:17,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:08:17,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:08:17,379 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:08:17,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c [2022-11-02 20:08:17,451 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/data/ce26cd0cd/a34058fbe84b4e07953320ce1c09a84d/FLAG9d7120c01 [2022-11-02 20:08:18,054 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:08:18,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c [2022-11-02 20:08:18,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/data/ce26cd0cd/a34058fbe84b4e07953320ce1c09a84d/FLAG9d7120c01 [2022-11-02 20:08:18,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/data/ce26cd0cd/a34058fbe84b4e07953320ce1c09a84d [2022-11-02 20:08:18,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:08:18,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:08:18,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:08:18,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:08:18,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:08:18,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fa989b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18, skipping insertion in model container [2022-11-02 20:08:18,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:08:18,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:08:18,604 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_014adff8-7f9b-4737-a236-fe7213fdaf0d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c[1116,1129] [2022-11-02 20:08:18,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:08:18,757 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:08:18,767 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_014adff8-7f9b-4737-a236-fe7213fdaf0d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c[1116,1129] [2022-11-02 20:08:18,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:08:18,877 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:08:18,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18 WrapperNode [2022-11-02 20:08:18,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:08:18,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:08:18,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:08:18,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:08:18,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,969 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 780 [2022-11-02 20:08:18,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:08:18,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:08:18,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:08:18,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:08:18,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:18,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:19,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:19,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:19,030 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:19,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:19,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:08:19,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:08:19,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:08:19,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:08:19,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (1/1) ... [2022-11-02 20:08:19,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:08:19,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:19,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:08:19,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:08:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:08:19,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:08:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:08:19,245 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:08:19,553 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:08:19,566 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:08:20,654 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:08:20,664 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:08:20,664 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:08:20,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:08:20 BoogieIcfgContainer [2022-11-02 20:08:20,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:08:20,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:08:20,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:08:20,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:08:20,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:08:18" (1/3) ... [2022-11-02 20:08:20,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e63a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:08:20, skipping insertion in model container [2022-11-02 20:08:20,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:18" (2/3) ... [2022-11-02 20:08:20,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e63a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:08:20, skipping insertion in model container [2022-11-02 20:08:20,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:08:20" (3/3) ... [2022-11-02 20:08:20,678 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.circular_pointer_top_w8_d8_e0.c [2022-11-02 20:08:20,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:08:20,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:08:20,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:08:20,779 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;@7c38ff5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:08:20,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:08:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 101 states have (on average 1.4752475247524752) internal successors, (149), 102 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:08:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:08:20,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:20,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:20,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:20,802 INFO L85 PathProgramCache]: Analyzing trace with hash 13956030, now seen corresponding path program 1 times [2022-11-02 20:08:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:20,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523011553] [2022-11-02 20:08:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:08:21,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:21,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523011553] [2022-11-02 20:08:21,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523011553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:21,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:21,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:08:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214275636] [2022-11-02 20:08:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:21,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:08:21,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:08:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:08:21,452 INFO L87 Difference]: Start difference. First operand has 107 states, 101 states have (on average 1.4752475247524752) internal successors, (149), 102 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:08:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:21,481 INFO L93 Difference]: Finished difference Result 208 states and 308 transitions. [2022-11-02 20:08:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:08:21,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-11-02 20:08:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:21,491 INFO L225 Difference]: With dead ends: 208 [2022-11-02 20:08:21,491 INFO L226 Difference]: Without dead ends: 103 [2022-11-02 20:08:21,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:08:21,497 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:21,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:08:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-02 20:08:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-02 20:08:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.4489795918367347) internal successors, (142), 98 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:08:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-11-02 20:08:21,543 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 47 [2022-11-02 20:08:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:21,543 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-11-02 20:08:21,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:08:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-11-02 20:08:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:08:21,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:21,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:21,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:08:21,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:21,547 INFO L85 PathProgramCache]: Analyzing trace with hash -109632008, now seen corresponding path program 1 times [2022-11-02 20:08:21,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:21,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663681621] [2022-11-02 20:08:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:26,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:08:26,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:26,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663681621] [2022-11-02 20:08:26,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663681621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:26,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:26,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:08:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793969096] [2022-11-02 20:08:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:08:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:08:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:08:26,130 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:08:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:27,109 INFO L93 Difference]: Finished difference Result 425 states and 618 transitions. [2022-11-02 20:08:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:08:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2022-11-02 20:08:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:27,113 INFO L225 Difference]: With dead ends: 425 [2022-11-02 20:08:27,113 INFO L226 Difference]: Without dead ends: 324 [2022-11-02 20:08:27,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:08:27,115 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1457 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:27,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 685 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:08:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-02 20:08:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 119. [2022-11-02 20:08:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4473684210526316) internal successors, (165), 114 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:08:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 171 transitions. [2022-11-02 20:08:27,138 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 171 transitions. Word has length 47 [2022-11-02 20:08:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:27,138 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 171 transitions. [2022-11-02 20:08:27,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:08:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 171 transitions. [2022-11-02 20:08:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:08:27,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:27,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:27,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:08:27,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash -52373706, now seen corresponding path program 1 times [2022-11-02 20:08:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:27,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406081221] [2022-11-02 20:08:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:29,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:08:29,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406081221] [2022-11-02 20:08:29,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406081221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:29,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:29,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:08:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104410948] [2022-11-02 20:08:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:29,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:08:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:08:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:08:29,538 INFO L87 Difference]: Start difference. First operand 119 states and 171 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:08:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:29,802 INFO L93 Difference]: Finished difference Result 320 states and 465 transitions. [2022-11-02 20:08:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:08:29,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2022-11-02 20:08:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:29,809 INFO L225 Difference]: With dead ends: 320 [2022-11-02 20:08:29,809 INFO L226 Difference]: Without dead ends: 318 [2022-11-02 20:08:29,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:08:29,819 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 902 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:29,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 642 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-02 20:08:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 159. [2022-11-02 20:08:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.448051948051948) internal successors, (223), 154 states have internal predecessors, (223), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:08:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 229 transitions. [2022-11-02 20:08:29,864 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 229 transitions. Word has length 47 [2022-11-02 20:08:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:29,864 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 229 transitions. [2022-11-02 20:08:29,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:08:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 229 transitions. [2022-11-02 20:08:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:08:29,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:29,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:08:29,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 9665908, now seen corresponding path program 1 times [2022-11-02 20:08:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:29,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549670722] [2022-11-02 20:08:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:29,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:30,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:30,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:30,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:08:30,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549670722] [2022-11-02 20:08:30,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549670722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:30,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:30,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:08:30,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037968830] [2022-11-02 20:08:30,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:30,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:08:30,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:08:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:08:30,416 INFO L87 Difference]: Start difference. First operand 159 states and 229 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:08:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:30,577 INFO L93 Difference]: Finished difference Result 434 states and 630 transitions. [2022-11-02 20:08:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:08:30,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2022-11-02 20:08:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:30,581 INFO L225 Difference]: With dead ends: 434 [2022-11-02 20:08:30,582 INFO L226 Difference]: Without dead ends: 277 [2022-11-02 20:08:30,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:08:30,588 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 263 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:30,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 430 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-02 20:08:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2022-11-02 20:08:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 159 states have (on average 1.4339622641509433) internal successors, (228), 159 states have internal predecessors, (228), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:08:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 240 transitions. [2022-11-02 20:08:30,631 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 240 transitions. Word has length 47 [2022-11-02 20:08:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:30,631 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 240 transitions. [2022-11-02 20:08:30,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:08:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 240 transitions. [2022-11-02 20:08:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-02 20:08:30,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:30,645 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:08:30,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash -681081075, now seen corresponding path program 1 times [2022-11-02 20:08:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:30,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661360041] [2022-11-02 20:08:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:30,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:08:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:08:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-02 20:08:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:32,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:32,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661360041] [2022-11-02 20:08:32,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661360041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:32,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045642447] [2022-11-02 20:08:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:32,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:32,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:32,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:08:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:08:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:08:33,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:08:33,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045642447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:33,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:08:33,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-02 20:08:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037051289] [2022-11-02 20:08:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:08:33,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:08:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:08:33,045 INFO L87 Difference]: Start difference. First operand 167 states and 240 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:08:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:33,269 INFO L93 Difference]: Finished difference Result 719 states and 1042 transitions. [2022-11-02 20:08:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:08:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 154 [2022-11-02 20:08:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:33,272 INFO L225 Difference]: With dead ends: 719 [2022-11-02 20:08:33,272 INFO L226 Difference]: Without dead ends: 562 [2022-11-02 20:08:33,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:08:33,274 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 601 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:33,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 600 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:08:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-02 20:08:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 267. [2022-11-02 20:08:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 259 states have (on average 1.444015444015444) internal successors, (374), 259 states have internal predecessors, (374), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:08:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 386 transitions. [2022-11-02 20:08:33,294 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 386 transitions. Word has length 154 [2022-11-02 20:08:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:33,295 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 386 transitions. [2022-11-02 20:08:33,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:08:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 386 transitions. [2022-11-02 20:08:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-02 20:08:33,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:33,297 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:33,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:33,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1737403403, now seen corresponding path program 1 times [2022-11-02 20:08:33,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:33,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811649878] [2022-11-02 20:08:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:08:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:08:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-02 20:08:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:34,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811649878] [2022-11-02 20:08:34,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811649878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:34,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876923589] [2022-11-02 20:08:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:34,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:34,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:34,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:34,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:08:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:08:35,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:08:35,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:08:35,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876923589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:35,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:08:35,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-02 20:08:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005698598] [2022-11-02 20:08:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:08:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:08:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:08:35,567 INFO L87 Difference]: Start difference. First operand 267 states and 386 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:08:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:35,766 INFO L93 Difference]: Finished difference Result 1186 states and 1725 transitions. [2022-11-02 20:08:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:08:35,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 154 [2022-11-02 20:08:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:35,773 INFO L225 Difference]: With dead ends: 1186 [2022-11-02 20:08:35,773 INFO L226 Difference]: Without dead ends: 929 [2022-11-02 20:08:35,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:08:35,778 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 568 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:35,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 919 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-11-02 20:08:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 339. [2022-11-02 20:08:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 331 states have (on average 1.4501510574018126) internal successors, (480), 331 states have internal predecessors, (480), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:08:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 492 transitions. [2022-11-02 20:08:35,815 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 492 transitions. Word has length 154 [2022-11-02 20:08:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:35,817 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 492 transitions. [2022-11-02 20:08:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:08:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 492 transitions. [2022-11-02 20:08:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-02 20:08:35,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:35,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:35,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:08:36,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1721884685, now seen corresponding path program 1 times [2022-11-02 20:08:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881294302] [2022-11-02 20:08:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:08:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:08:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-02 20:08:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881294302] [2022-11-02 20:08:37,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881294302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671736346] [2022-11-02 20:08:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:37,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:37,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:37,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:08:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:08:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:38,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:39,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671736346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:39,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:39,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 19 [2022-11-02 20:08:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181925514] [2022-11-02 20:08:39,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:08:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:08:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:08:39,433 INFO L87 Difference]: Start difference. First operand 339 states and 492 transitions. Second operand has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 5 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-02 20:08:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:40,099 INFO L93 Difference]: Finished difference Result 1272 states and 1856 transitions. [2022-11-02 20:08:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:08:40,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 5 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 154 [2022-11-02 20:08:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:40,104 INFO L225 Difference]: With dead ends: 1272 [2022-11-02 20:08:40,104 INFO L226 Difference]: Without dead ends: 943 [2022-11-02 20:08:40,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:08:40,106 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1427 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:40,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 2090 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:08:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-02 20:08:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 413. [2022-11-02 20:08:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 405 states have (on average 1.4395061728395062) internal successors, (583), 405 states have internal predecessors, (583), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:08:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 595 transitions. [2022-11-02 20:08:40,130 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 595 transitions. Word has length 154 [2022-11-02 20:08:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:40,131 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 595 transitions. [2022-11-02 20:08:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 5 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-02 20:08:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 595 transitions. [2022-11-02 20:08:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-02 20:08:40,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:40,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:40,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:40,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:08:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1721944267, now seen corresponding path program 1 times [2022-11-02 20:08:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:40,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201229817] [2022-11-02 20:08:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:40,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:08:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:08:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:08:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:08:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:08:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-02 20:08:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:52,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201229817] [2022-11-02 20:08:52,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201229817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312427110] [2022-11-02 20:08:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:52,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:52,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:52,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:08:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 20:08:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:08:56,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:09:06,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312427110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:06,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:06,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 12] total 31 [2022-11-02 20:09:06,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412076236] [2022-11-02 20:09:06,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:06,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:09:06,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:07,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:09:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:09:07,001 INFO L87 Difference]: Start difference. First operand 413 states and 595 transitions. Second operand has 31 states, 31 states have (on average 11.258064516129032) internal successors, (349), 31 states have internal predecessors, (349), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-02 20:09:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:46,250 INFO L93 Difference]: Finished difference Result 11477 states and 16744 transitions. [2022-11-02 20:09:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-11-02 20:09:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 11.258064516129032) internal successors, (349), 31 states have internal predecessors, (349), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 154 [2022-11-02 20:09:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:46,283 INFO L225 Difference]: With dead ends: 11477 [2022-11-02 20:09:46,284 INFO L226 Difference]: Without dead ends: 11140 [2022-11-02 20:09:46,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21916 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=7136, Invalid=48796, Unknown=0, NotChecked=0, Total=55932 [2022-11-02 20:09:46,306 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 22807 mSDsluCounter, 10445 mSDsCounter, 0 mSdLazyCounter, 6418 mSolverCounterSat, 1823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22807 SdHoareTripleChecker+Valid, 11188 SdHoareTripleChecker+Invalid, 8241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1823 IncrementalHoareTripleChecker+Valid, 6418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22807 Valid, 11188 Invalid, 8241 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1823 Valid, 6418 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-11-02 20:09:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-11-02 20:09:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 731. [2022-11-02 20:09:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 717 states have (on average 1.4407252440725244) internal successors, (1033), 717 states have internal predecessors, (1033), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 20:09:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1057 transitions. [2022-11-02 20:09:46,420 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1057 transitions. Word has length 154 [2022-11-02 20:09:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:46,420 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1057 transitions. [2022-11-02 20:09:46,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.258064516129032) internal successors, (349), 31 states have internal predecessors, (349), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-02 20:09:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1057 transitions. [2022-11-02 20:09:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-02 20:09:46,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:46,424 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:09:46,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:09:46,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:09:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1275981321, now seen corresponding path program 1 times [2022-11-02 20:09:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:46,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476999548] [2022-11-02 20:09:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:09:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:09:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:09:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:09:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:09:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-02 20:09:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:09:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476999548] [2022-11-02 20:09:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476999548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235252141] [2022-11-02 20:09:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:56,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:56,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:56,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_014adff8-7f9b-4737-a236-fe7213fdaf0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:09:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-02 20:09:58,222 INFO L286 TraceCheckSpWp]: Computing forward predicates...