./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.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_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/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_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/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_ae11a7c2-bf07-4147-8311-cca079c22229/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 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:00:15,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:00:15,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:00:15,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:00:15,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:00:15,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:00:15,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:00:15,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:00:15,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:00:15,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:00:15,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:00:15,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:00:15,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:00:15,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:00:15,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:00:15,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:00:15,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:00:15,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:00:15,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:00:15,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:00:15,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:00:15,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:00:15,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:00:15,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:00:15,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:00:15,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:00:15,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:00:15,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:00:15,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:00:15,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:00:15,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:00:15,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:00:15,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:00:15,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:00:15,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:00:15,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:00:15,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:00:15,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:00:15,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:00:15,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:00:15,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:00:15,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 21:00:15,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:00:15,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:00:15,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:00:15,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:00:15,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:00:15,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:00:15,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:00:15,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:00:15,987 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:00:15,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:00:15,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:00:15,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:00:15,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:00:15,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:00:15,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:00:15,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:00:15,990 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:00:15,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:00:15,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:00:15,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:00:15,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:00:15,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:15,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:00:15,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:00:15,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:00:15,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:00:15,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:00:15,992 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:00:15,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:00:15,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:00:15,993 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_ae11a7c2-bf07-4147-8311-cca079c22229/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 [2022-11-02 21:00:16,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:00:16,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:00:16,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:00:16,334 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:00:16,336 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:00:16,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-02 21:00:16,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/cccdcc772/337ee44fdcfb4439b984f93877363fc4/FLAG023b54943 [2022-11-02 21:00:17,027 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:00:17,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-02 21:00:17,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/cccdcc772/337ee44fdcfb4439b984f93877363fc4/FLAG023b54943 [2022-11-02 21:00:17,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/cccdcc772/337ee44fdcfb4439b984f93877363fc4 [2022-11-02 21:00:17,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:00:17,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:00:17,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:17,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:00:17,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:00:17,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:17" (1/1) ... [2022-11-02 21:00:17,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f13e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:17, skipping insertion in model container [2022-11-02 21:00:17,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:17" (1/1) ... [2022-11-02 21:00:17,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:00:17,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:00:17,612 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_ae11a7c2-bf07-4147-8311-cca079c22229/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-02 21:00:18,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:18,124 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:00:18,139 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_ae11a7c2-bf07-4147-8311-cca079c22229/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-02 21:00:18,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:18,418 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:00:18,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18 WrapperNode [2022-11-02 21:00:18,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:18,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:18,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:00:18,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:00:18,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,736 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3243 [2022-11-02 21:00:18,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:18,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:00:18,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:00:18,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:00:18,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,962 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:18,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:19,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:00:19,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:00:19,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:00:19,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:00:19,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (1/1) ... [2022-11-02 21:00:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:19,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:00:19,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:00:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:00:19,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:00:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:00:19,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:00:19,868 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:00:19,884 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:00:26,308 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:00:26,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:00:26,320 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:00:26,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:26 BoogieIcfgContainer [2022-11-02 21:00:26,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:00:26,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:00:26,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:00:26,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:00:26,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:00:17" (1/3) ... [2022-11-02 21:00:26,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136f8a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:26, skipping insertion in model container [2022-11-02 21:00:26,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:18" (2/3) ... [2022-11-02 21:00:26,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136f8a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:26, skipping insertion in model container [2022-11-02 21:00:26,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:26" (3/3) ... [2022-11-02 21:00:26,344 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2022-11-02 21:00:26,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:00:26,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:00:26,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:00:26,433 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;@44b86e1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:00:26,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:00:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 420 states have (on average 1.4928571428571429) internal successors, (627), 421 states have internal predecessors, (627), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:00:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 21:00:26,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:26,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:26,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1854206878, now seen corresponding path program 1 times [2022-11-02 21:00:26,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:26,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135567459] [2022-11-02 21:00:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:00:26,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:00:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:00:27,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:00:27,088 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:00:27,089 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 21:00:27,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:00:27,096 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 21:00:27,101 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 21:00:27,161 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-02 21:00:27,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 09:00:27 BoogieIcfgContainer [2022-11-02 21:00:27,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 21:00:27,185 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 21:00:27,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 21:00:27,185 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 21:00:27,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:26" (3/4) ... [2022-11-02 21:00:27,191 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 21:00:27,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 21:00:27,194 INFO L158 Benchmark]: Toolchain (without parser) took 9950.01ms. Allocated memory was 94.4MB in the beginning and 331.4MB in the end (delta: 237.0MB). Free memory was 53.5MB in the beginning and 160.1MB in the end (delta: -106.6MB). Peak memory consumption was 130.7MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,194 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 74.2MB in the beginning and 74.1MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:00:27,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1176.61ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 53.3MB in the beginning and 72.1MB in the end (delta: -18.8MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,197 INFO L158 Benchmark]: Boogie Procedure Inliner took 315.13ms. Allocated memory is still 121.6MB. Free memory was 72.1MB in the beginning and 51.8MB in the end (delta: 20.4MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,198 INFO L158 Benchmark]: Boogie Preprocessor took 290.53ms. Allocated memory is still 121.6MB. Free memory was 51.8MB in the beginning and 44.7MB in the end (delta: 7.0MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,203 INFO L158 Benchmark]: RCFGBuilder took 7293.57ms. Allocated memory was 121.6MB in the beginning and 331.4MB in the end (delta: 209.7MB). Free memory was 44.7MB in the beginning and 226.2MB in the end (delta: -181.5MB). Peak memory consumption was 185.4MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,204 INFO L158 Benchmark]: TraceAbstraction took 857.49ms. Allocated memory is still 331.4MB. Free memory was 226.2MB in the beginning and 161.2MB in the end (delta: 65.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,207 INFO L158 Benchmark]: Witness Printer took 7.40ms. Allocated memory is still 331.4MB. Free memory was 161.2MB in the beginning and 160.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 21:00:27,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 74.2MB in the beginning and 74.1MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1176.61ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 53.3MB in the beginning and 72.1MB in the end (delta: -18.8MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 315.13ms. Allocated memory is still 121.6MB. Free memory was 72.1MB in the beginning and 51.8MB in the end (delta: 20.4MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 290.53ms. Allocated memory is still 121.6MB. Free memory was 51.8MB in the beginning and 44.7MB in the end (delta: 7.0MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. * RCFGBuilder took 7293.57ms. Allocated memory was 121.6MB in the beginning and 331.4MB in the end (delta: 209.7MB). Free memory was 44.7MB in the beginning and 226.2MB in the end (delta: -181.5MB). Peak memory consumption was 185.4MB. Max. memory is 16.1GB. * TraceAbstraction took 857.49ms. Allocated memory is still 331.4MB. Free memory was 226.2MB in the beginning and 161.2MB in the end (delta: 65.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 7.40ms. Allocated memory is still 331.4MB. Free memory was 161.2MB in the beginning and 160.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 340, overapproximation of bitwiseAnd at line 323. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_6 mask_SORT_6 = (SORT_6)-1 >> (sizeof(SORT_6) * 8 - 12); [L32] const SORT_6 msb_SORT_6 = (SORT_6)1 << (12 - 1); [L34] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 32); [L35] const SORT_11 msb_SORT_11 = (SORT_11)1 << (32 - 1); [L37] const SORT_37 mask_SORT_37 = (SORT_37)-1 >> (sizeof(SORT_37) * 8 - 3); [L38] const SORT_37 msb_SORT_37 = (SORT_37)1 << (3 - 1); [L40] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 2); [L41] const SORT_44 msb_SORT_44 = (SORT_44)1 << (2 - 1); [L43] const SORT_295 mask_SORT_295 = (SORT_295)-1 >> (sizeof(SORT_295) * 8 - 4); [L44] const SORT_295 msb_SORT_295 = (SORT_295)1 << (4 - 1); [L46] const SORT_297 mask_SORT_297 = (SORT_297)-1 >> (sizeof(SORT_297) * 8 - 5); [L47] const SORT_297 msb_SORT_297 = (SORT_297)1 << (5 - 1); [L49] const SORT_299 mask_SORT_299 = (SORT_299)-1 >> (sizeof(SORT_299) * 8 - 6); [L50] const SORT_299 msb_SORT_299 = (SORT_299)1 << (6 - 1); [L52] const SORT_301 mask_SORT_301 = (SORT_301)-1 >> (sizeof(SORT_301) * 8 - 7); [L53] const SORT_301 msb_SORT_301 = (SORT_301)1 << (7 - 1); [L55] const SORT_303 mask_SORT_303 = (SORT_303)-1 >> (sizeof(SORT_303) * 8 - 8); [L56] const SORT_303 msb_SORT_303 = (SORT_303)1 << (8 - 1); [L58] const SORT_305 mask_SORT_305 = (SORT_305)-1 >> (sizeof(SORT_305) * 8 - 9); [L59] const SORT_305 msb_SORT_305 = (SORT_305)1 << (9 - 1); [L61] const SORT_307 mask_SORT_307 = (SORT_307)-1 >> (sizeof(SORT_307) * 8 - 10); [L62] const SORT_307 msb_SORT_307 = (SORT_307)1 << (10 - 1); [L64] const SORT_309 mask_SORT_309 = (SORT_309)-1 >> (sizeof(SORT_309) * 8 - 11); [L65] const SORT_309 msb_SORT_309 = (SORT_309)1 << (11 - 1); [L67] const SORT_312 mask_SORT_312 = (SORT_312)-1 >> (sizeof(SORT_312) * 8 - 13); [L68] const SORT_312 msb_SORT_312 = (SORT_312)1 << (13 - 1); [L70] const SORT_314 mask_SORT_314 = (SORT_314)-1 >> (sizeof(SORT_314) * 8 - 14); [L71] const SORT_314 msb_SORT_314 = (SORT_314)1 << (14 - 1); [L73] const SORT_316 mask_SORT_316 = (SORT_316)-1 >> (sizeof(SORT_316) * 8 - 15); [L74] const SORT_316 msb_SORT_316 = (SORT_316)1 << (15 - 1); [L76] const SORT_533 mask_SORT_533 = (SORT_533)-1 >> (sizeof(SORT_533) * 8 - 17); [L77] const SORT_533 msb_SORT_533 = (SORT_533)1 << (17 - 1); [L79] const SORT_6 var_7 = 0; [L80] const SORT_11 var_13 = 0; [L81] const SORT_3 var_21 = 0; [L82] const SORT_1 var_26 = 0; [L83] const SORT_37 var_38 = 0; [L84] const SORT_1 var_57 = 1; [L85] const SORT_37 var_93 = 2; [L86] const SORT_37 var_97 = 1; [L87] const SORT_37 var_105 = 4; [L88] const SORT_37 var_107 = 5; [L89] const SORT_37 var_111 = 3; [L90] const SORT_6 var_128 = 2; [L91] const SORT_44 var_138 = 0; [L92] const SORT_3 var_145 = 65535; [L93] const SORT_297 var_534 = 0; [L94] const SORT_301 var_626 = 5; [L95] const SORT_301 var_630 = 4; [L96] const SORT_301 var_634 = 3; [L97] const SORT_301 var_638 = 2; [L98] const SORT_301 var_642 = 1; [L99] const SORT_301 var_646 = 0; [L101] SORT_1 input_2; [L102] SORT_3 input_4; [L103] SORT_3 input_5; [L104] SORT_6 input_114; [L105] SORT_6 input_115; [L106] SORT_6 input_116; [L107] SORT_3 input_134; [L108] SORT_3 input_135; [L109] SORT_3 input_136; [L110] SORT_3 input_144; [L111] SORT_3 input_153; [L112] SORT_3 input_154; [L113] SORT_3 input_155; [L114] SORT_3 input_158; [L115] SORT_3 input_176; [L116] SORT_3 input_177; [L117] SORT_3 input_178; [L118] SORT_3 input_181; [L119] SORT_3 input_183; [L120] SORT_44 input_197; [L121] SORT_44 input_198; [L122] SORT_44 input_199; [L123] SORT_3 input_529; [L124] SORT_3 input_530; [L125] SORT_3 input_531; [L126] SORT_3 input_532; [L127] SORT_3 input_555; [L128] SORT_3 input_557; [L129] SORT_3 input_559; [L130] SORT_3 input_563; [L131] SORT_3 input_564; [L132] SORT_3 input_565; [L133] SORT_3 input_566; [L134] SORT_3 input_585; [L135] SORT_3 input_589; [L136] SORT_3 input_591; [L137] SORT_3 input_598; [L138] SORT_3 input_600; [L139] SORT_3 input_605; [L140] SORT_3 input_607; [L141] SORT_3 input_611; [L142] SORT_3 input_612; [L143] SORT_3 input_613; [L144] SORT_3 input_614; [L145] SORT_3 input_615; [L146] SORT_3 input_616; [L147] SORT_3 input_617; [L148] SORT_3 input_618; [L149] SORT_3 input_619; [L150] SORT_3 input_620; [L151] SORT_3 input_621; [L152] SORT_3 input_622; [L153] SORT_3 input_629; [L154] SORT_3 input_633; [L155] SORT_3 input_637; [L156] SORT_3 input_641; [L157] SORT_3 input_645; [L158] SORT_3 input_650; [L159] SORT_3 input_656; [L160] SORT_3 input_658; [L161] SORT_3 input_660; [L162] SORT_3 input_662; [L163] SORT_3 input_665; [L164] SORT_3 input_671; [L165] SORT_3 input_673; [L166] SORT_3 input_675; [L167] SORT_3 input_678; [L168] SORT_3 input_684; [L169] SORT_3 input_686; [L170] SORT_3 input_689; [L171] SORT_3 input_695; [L172] SORT_3 input_698; [L173] SORT_3 input_705; [L174] SORT_3 input_710; [L175] SORT_1 input_729; [L176] SORT_1 input_730; [L177] SORT_1 input_731; [L178] SORT_1 input_732; [L179] SORT_1 input_735; [L180] SORT_1 input_737; [L181] SORT_1 input_739; [L182] SORT_1 input_744; [L183] SORT_1 input_746; [L184] SORT_1 input_751; [L185] SORT_3 input_764; [L186] SORT_3 input_765; [L187] SORT_3 input_766; [L189] SORT_6 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L190] SORT_6 state_15 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L191] SORT_3 state_22 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L192] SORT_3 state_24 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L193] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L194] SORT_3 state_30 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L195] SORT_37 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_37; [L196] SORT_3 state_80 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L197] SORT_3 state_82 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L198] SORT_3 state_84 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L199] SORT_1 state_86 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L200] SORT_3 state_88 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L201] SORT_3 state_90 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L203] SORT_6 init_9_arg_1 = var_7; [L204] state_8 = init_9_arg_1 [L205] SORT_6 init_16_arg_1 = var_7; [L206] state_15 = init_16_arg_1 [L207] SORT_3 init_23_arg_1 = var_21; [L208] state_22 = init_23_arg_1 [L209] SORT_3 init_25_arg_1 = var_21; [L210] state_24 = init_25_arg_1 [L211] SORT_3 init_29_arg_1 = var_21; [L212] state_28 = init_29_arg_1 [L213] SORT_3 init_31_arg_1 = var_21; [L214] state_30 = init_31_arg_1 [L215] SORT_37 init_40_arg_1 = var_38; [L216] state_39 = init_40_arg_1 [L217] SORT_3 init_81_arg_1 = var_21; [L218] state_80 = init_81_arg_1 [L219] SORT_3 init_83_arg_1 = var_21; [L220] state_82 = init_83_arg_1 [L221] SORT_3 init_85_arg_1 = var_21; [L222] state_84 = init_85_arg_1 [L223] SORT_1 init_87_arg_1 = var_26; [L224] state_86 = init_87_arg_1 [L225] SORT_3 init_89_arg_1 = var_21; [L226] state_88 = init_89_arg_1 [L227] SORT_3 init_91_arg_1 = var_21; [L228] state_90 = init_91_arg_1 VAL [init_16_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_40_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_89_arg_1=0, init_91_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_11=4294967295, mask_SORT_295=15, mask_SORT_297=31, mask_SORT_299=63, mask_SORT_3=65535, mask_SORT_301=127, mask_SORT_303=255, mask_SORT_305=511, mask_SORT_307=1023, mask_SORT_309=2047, mask_SORT_312=8191, mask_SORT_314=16383, mask_SORT_316=32767, mask_SORT_37=7, mask_SORT_44=3, mask_SORT_533=4294967295, mask_SORT_6=4095, msb_SORT_1=1, msb_SORT_11=2147483648, msb_SORT_295=8, msb_SORT_297=16, msb_SORT_299=32, msb_SORT_3=32768, msb_SORT_301=64, msb_SORT_303=128, msb_SORT_305=256, msb_SORT_307=512, msb_SORT_309=1024, msb_SORT_312=4096, msb_SORT_314=8192, msb_SORT_316=16384, msb_SORT_37=4, msb_SORT_44=2, msb_SORT_533=65536, msb_SORT_6=2048, state_15=0, state_22=0, state_24=0, state_28=0, state_30=0, state_39=0, state_8=0, state_80=0, state_82=0, state_84=0, state_86=0, state_88=0, state_90=0, var_105=4, var_107=5, var_111=3, var_128=2, var_13=0, var_138=0, var_145=65535, var_21=0, var_26=0, var_38=0, var_534=0, var_57=1, var_626=5, var_630=4, var_634=3, var_638=2, var_642=1, var_646=0, var_7=0, var_93=2, var_97=1] [L231] input_2 = __VERIFIER_nondet_uchar() [L232] input_4 = __VERIFIER_nondet_ushort() [L233] input_5 = __VERIFIER_nondet_ushort() [L234] input_114 = __VERIFIER_nondet_ushort() [L235] input_115 = __VERIFIER_nondet_ushort() [L236] input_116 = __VERIFIER_nondet_ushort() [L237] input_134 = __VERIFIER_nondet_ushort() [L238] input_135 = __VERIFIER_nondet_ushort() [L239] input_136 = __VERIFIER_nondet_ushort() [L240] input_144 = __VERIFIER_nondet_ushort() [L241] input_153 = __VERIFIER_nondet_ushort() [L242] input_154 = __VERIFIER_nondet_ushort() [L243] input_155 = __VERIFIER_nondet_ushort() [L244] input_158 = __VERIFIER_nondet_ushort() [L245] input_176 = __VERIFIER_nondet_ushort() [L246] input_177 = __VERIFIER_nondet_ushort() [L247] input_178 = __VERIFIER_nondet_ushort() [L248] input_181 = __VERIFIER_nondet_ushort() [L249] input_183 = __VERIFIER_nondet_ushort() [L250] input_197 = __VERIFIER_nondet_uchar() [L251] input_198 = __VERIFIER_nondet_uchar() [L252] input_199 = __VERIFIER_nondet_uchar() [L253] input_529 = __VERIFIER_nondet_ushort() [L254] input_530 = __VERIFIER_nondet_ushort() [L255] input_531 = __VERIFIER_nondet_ushort() [L256] input_532 = __VERIFIER_nondet_ushort() [L257] input_555 = __VERIFIER_nondet_ushort() [L258] input_557 = __VERIFIER_nondet_ushort() [L259] input_559 = __VERIFIER_nondet_ushort() [L260] input_563 = __VERIFIER_nondet_ushort() [L261] input_564 = __VERIFIER_nondet_ushort() [L262] input_565 = __VERIFIER_nondet_ushort() [L263] input_566 = __VERIFIER_nondet_ushort() [L264] input_585 = __VERIFIER_nondet_ushort() [L265] input_589 = __VERIFIER_nondet_ushort() [L266] input_591 = __VERIFIER_nondet_ushort() [L267] input_598 = __VERIFIER_nondet_ushort() [L268] input_600 = __VERIFIER_nondet_ushort() [L269] input_605 = __VERIFIER_nondet_ushort() [L270] input_607 = __VERIFIER_nondet_ushort() [L271] input_611 = __VERIFIER_nondet_ushort() [L272] input_612 = __VERIFIER_nondet_ushort() [L273] input_613 = __VERIFIER_nondet_ushort() [L274] input_614 = __VERIFIER_nondet_ushort() [L275] input_615 = __VERIFIER_nondet_ushort() [L276] input_616 = __VERIFIER_nondet_ushort() [L277] input_617 = __VERIFIER_nondet_ushort() [L278] input_618 = __VERIFIER_nondet_ushort() [L279] input_619 = __VERIFIER_nondet_ushort() [L280] input_620 = __VERIFIER_nondet_ushort() [L281] input_621 = __VERIFIER_nondet_ushort() [L282] input_622 = __VERIFIER_nondet_ushort() [L283] input_629 = __VERIFIER_nondet_ushort() [L284] input_633 = __VERIFIER_nondet_ushort() [L285] input_637 = __VERIFIER_nondet_ushort() [L286] input_641 = __VERIFIER_nondet_ushort() [L287] input_645 = __VERIFIER_nondet_ushort() [L288] input_650 = __VERIFIER_nondet_ushort() [L289] input_656 = __VERIFIER_nondet_ushort() [L290] input_658 = __VERIFIER_nondet_ushort() [L291] input_660 = __VERIFIER_nondet_ushort() [L292] input_662 = __VERIFIER_nondet_ushort() [L293] input_665 = __VERIFIER_nondet_ushort() [L294] input_671 = __VERIFIER_nondet_ushort() [L295] input_673 = __VERIFIER_nondet_ushort() [L296] input_675 = __VERIFIER_nondet_ushort() [L297] input_678 = __VERIFIER_nondet_ushort() [L298] input_684 = __VERIFIER_nondet_ushort() [L299] input_686 = __VERIFIER_nondet_ushort() [L300] input_689 = __VERIFIER_nondet_ushort() [L301] input_695 = __VERIFIER_nondet_ushort() [L302] input_698 = __VERIFIER_nondet_ushort() [L303] input_705 = __VERIFIER_nondet_ushort() [L304] input_710 = __VERIFIER_nondet_ushort() [L305] input_729 = __VERIFIER_nondet_uchar() [L306] input_730 = __VERIFIER_nondet_uchar() [L307] input_731 = __VERIFIER_nondet_uchar() [L308] input_732 = __VERIFIER_nondet_uchar() [L309] input_735 = __VERIFIER_nondet_uchar() [L310] input_737 = __VERIFIER_nondet_uchar() [L311] input_739 = __VERIFIER_nondet_uchar() [L312] input_744 = __VERIFIER_nondet_uchar() [L313] input_746 = __VERIFIER_nondet_uchar() [L314] input_751 = __VERIFIER_nondet_uchar() [L315] input_764 = __VERIFIER_nondet_ushort() [L316] input_765 = __VERIFIER_nondet_ushort() [L317] input_766 = __VERIFIER_nondet_ushort() [L320] SORT_6 var_10_arg_0 = state_8; [L321] SORT_1 var_10 = var_10_arg_0 >> 0; [L322] SORT_1 var_52_arg_0 = var_10; [L323] var_52_arg_0 = var_52_arg_0 & mask_SORT_1 [L324] SORT_11 var_52 = var_52_arg_0; [L325] SORT_11 var_53_arg_0 = var_52; [L326] SORT_11 var_53_arg_1 = var_13; [L327] SORT_1 var_53 = var_53_arg_0 == var_53_arg_1; [L328] SORT_6 var_17_arg_0 = state_15; [L329] SORT_1 var_17 = var_17_arg_0 >> 0; [L330] SORT_1 var_54_arg_0 = var_17; [L331] var_54_arg_0 = var_54_arg_0 & mask_SORT_1 [L332] SORT_11 var_54 = var_54_arg_0; [L333] SORT_11 var_55_arg_0 = var_54; [L334] SORT_11 var_55_arg_1 = var_13; [L335] SORT_1 var_55 = var_55_arg_0 == var_55_arg_1; [L336] SORT_1 var_56_arg_0 = var_53; [L337] SORT_1 var_56_arg_1 = var_55; [L338] SORT_1 var_56 = var_56_arg_0 & var_56_arg_1; [L339] SORT_1 var_58_arg_0 = var_56; [L340] SORT_1 var_58 = ~var_58_arg_0; [L341] SORT_1 var_59_arg_0 = var_57; [L342] SORT_1 var_59_arg_1 = var_58; [L343] SORT_1 var_59 = var_59_arg_0 & var_59_arg_1; [L344] var_59 = var_59 & mask_SORT_1 [L345] SORT_1 bad_60_arg_0 = var_59; VAL [bad_60_arg_0=1, init_16_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_40_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_89_arg_1=0, init_91_arg_1=0, init_9_arg_1=0, input_114=24, input_115=37, input_116=56, input_134=77, input_135=11, input_136=47, input_144=9, input_153=63, input_154=29, input_155=10, input_158=85, input_176=13, input_177=87, input_178=57, input_181=71, input_183=73, input_197=36, input_198=79, input_199=40, input_2=83, input_4=44, input_5=41, input_529=55, input_530=62, input_531=5, input_532=35, input_555=33, input_557=34, input_559=1, input_563=74, input_564=86, input_565=80, input_566=20, input_585=75, input_589=2, input_591=58, input_598=28, input_600=23, input_605=69, input_607=78, input_611=38, input_612=32, input_613=14, input_614=84, input_615=50, input_616=52, input_617=21, input_618=51, input_619=4, input_620=49, input_621=6, input_622=81, input_629=25, input_633=60, input_637=8, input_641=17, input_645=68, input_650=70, input_656=19, input_658=53, input_660=31, input_662=46, input_665=22, input_671=64, input_673=7, input_675=43, input_678=26, input_684=48, input_686=39, input_689=12, input_695=82, input_698=61, input_705=45, input_710=15, input_729=27, input_730=30, input_731=65, input_732=66, input_735=72, input_737=42, input_739=18, input_744=16, input_746=59, input_751=76, input_764=54, input_765=3, input_766=67, mask_SORT_1=1, mask_SORT_11=4294967295, mask_SORT_295=15, mask_SORT_297=31, mask_SORT_299=63, mask_SORT_3=65535, mask_SORT_301=127, mask_SORT_303=255, mask_SORT_305=511, mask_SORT_307=1023, mask_SORT_309=2047, mask_SORT_312=8191, mask_SORT_314=16383, mask_SORT_316=32767, mask_SORT_37=7, mask_SORT_44=3, mask_SORT_533=4294967295, mask_SORT_6=4095, msb_SORT_1=1, msb_SORT_11=2147483648, msb_SORT_295=8, msb_SORT_297=16, msb_SORT_299=32, msb_SORT_3=32768, msb_SORT_301=64, msb_SORT_303=128, msb_SORT_305=256, msb_SORT_307=512, msb_SORT_309=1024, msb_SORT_312=4096, msb_SORT_314=8192, msb_SORT_316=16384, msb_SORT_37=4, msb_SORT_44=2, msb_SORT_533=65536, msb_SORT_6=2048, state_15=0, state_22=0, state_24=0, state_28=0, state_30=0, state_39=0, state_8=0, state_80=0, state_82=0, state_84=0, state_86=0, state_88=0, state_90=0, var_10=0, var_105=4, var_107=5, var_10_arg_0=0, var_111=3, var_128=2, var_13=0, var_138=0, var_145=65535, var_17=0, var_17_arg_0=0, var_21=0, var_26=0, var_38=0, var_52=0, var_52_arg_0=0, var_53=1, var_534=0, var_53_arg_0=0, var_53_arg_1=0, var_54=0, var_54_arg_0=0, var_55=1, var_55_arg_0=0, var_55_arg_1=0, var_56=1, var_56_arg_0=1, var_56_arg_1=1, var_57=1, var_58=1, var_58_arg_0=1, var_59=1, var_59_arg_0=1, var_59_arg_1=1, var_626=5, var_630=4, var_634=3, var_638=2, var_642=1, var_646=0, var_7=0, var_93=2, var_97=1] [L346] CALL __VERIFIER_assert(!(bad_60_arg_0)) VAL [\old(cond)=0] [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 427 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=427occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 21:00:27,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/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_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/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 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:00:29,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:00:29,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:00:29,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:00:29,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:00:29,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:00:29,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:00:29,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:00:29,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:00:29,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:00:29,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:00:29,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:00:29,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:00:29,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:00:29,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:00:29,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:00:29,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:00:29,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:00:29,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:00:29,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:00:29,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:00:29,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:00:29,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:00:29,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:00:29,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:00:29,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:00:29,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:00:29,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:00:29,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:00:29,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:00:29,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:00:29,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:00:29,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:00:29,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:00:29,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:00:29,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:00:29,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:00:29,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:00:29,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:00:29,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:00:29,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:00:29,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 21:00:29,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:00:29,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:00:29,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:00:29,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:00:29,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:00:29,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:00:29,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:00:29,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:00:29,857 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:00:29,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:00:29,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:00:29,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:00:29,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:00:29,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:00:29,858 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:00:29,858 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 21:00:29,858 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 21:00:29,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:00:29,859 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:00:29,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:00:29,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:00:29,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:00:29,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:00:29,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:29,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:00:29,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:00:29,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:00:29,861 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 21:00:29,861 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 21:00:29,861 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:00:29,861 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:00:29,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:00:29,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 21:00:29,862 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ae11a7c2-bf07-4147-8311-cca079c22229/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 [2022-11-02 21:00:30,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:00:30,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:00:30,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:00:30,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:00:30,324 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:00:30,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-02 21:00:30,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/77175995c/cec92056e11e4e3b8094ec5349c62949/FLAGc1779142d [2022-11-02 21:00:31,163 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:00:31,164 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-02 21:00:31,190 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/77175995c/cec92056e11e4e3b8094ec5349c62949/FLAGc1779142d [2022-11-02 21:00:31,275 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/data/77175995c/cec92056e11e4e3b8094ec5349c62949 [2022-11-02 21:00:31,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:00:31,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:00:31,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:31,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:00:31,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:00:31,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:31" (1/1) ... [2022-11-02 21:00:31,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba00645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:31, skipping insertion in model container [2022-11-02 21:00:31,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:31" (1/1) ... [2022-11-02 21:00:31,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:00:31,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:00:31,579 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_ae11a7c2-bf07-4147-8311-cca079c22229/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-02 21:00:32,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:32,137 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:00:32,150 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_ae11a7c2-bf07-4147-8311-cca079c22229/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-02 21:00:32,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:32,424 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:00:32,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32 WrapperNode [2022-11-02 21:00:32,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:32,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:32,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:00:32,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:00:32,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,633 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3243 [2022-11-02 21:00:32,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:32,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:00:32,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:00:32,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:00:32,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,763 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:00:32,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:00:32,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:00:32,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:00:32,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (1/1) ... [2022-11-02 21:00:32,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:32,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:00:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:00:32,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:00:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:00:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:00:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:00:33,653 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:00:33,655 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:00:35,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:00:35,781 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:00:35,782 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:00:35,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:35 BoogieIcfgContainer [2022-11-02 21:00:35,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:00:35,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:00:35,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:00:35,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:00:35,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:00:31" (1/3) ... [2022-11-02 21:00:35,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3bd722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:35, skipping insertion in model container [2022-11-02 21:00:35,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:32" (2/3) ... [2022-11-02 21:00:35,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3bd722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:35, skipping insertion in model container [2022-11-02 21:00:35,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:35" (3/3) ... [2022-11-02 21:00:35,795 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2022-11-02 21:00:35,816 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:00:35,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:00:35,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:00:35,886 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;@70440ba1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:00:35,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:00:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 420 states have (on average 1.4928571428571429) internal successors, (627), 421 states have internal predecessors, (627), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:00:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 21:00:35,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:35,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:35,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1854206878, now seen corresponding path program 1 times [2022-11-02 21:00:35,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:35,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033215596] [2022-11-02 21:00:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:35,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:35,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:35,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 21:00:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:00:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:36,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:36,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033215596] [2022-11-02 21:00:36,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033215596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:36,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:36,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:00:36,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485247703] [2022-11-02 21:00:36,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:36,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:00:36,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:00:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:00:36,906 INFO L87 Difference]: Start difference. First operand has 427 states, 420 states have (on average 1.4928571428571429) internal successors, (627), 421 states have internal predecessors, (627), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:37,361 INFO L93 Difference]: Finished difference Result 854 states and 1279 transitions. [2022-11-02 21:00:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:00:37,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 21:00:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:37,380 INFO L225 Difference]: With dead ends: 854 [2022-11-02 21:00:37,380 INFO L226 Difference]: Without dead ends: 429 [2022-11-02 21:00:37,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:37,394 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 6 mSDsluCounter, 2416 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:37,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3042 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-11-02 21:00:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-02 21:00:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-11-02 21:00:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 421 states have (on average 1.484560570071259) internal successors, (625), 422 states have internal predecessors, (625), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:00:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 635 transitions. [2022-11-02 21:00:37,466 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 635 transitions. Word has length 7 [2022-11-02 21:00:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:37,467 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 635 transitions. [2022-11-02 21:00:37,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 635 transitions. [2022-11-02 21:00:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 21:00:37,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:37,469 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:37,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:37,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:37,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 117067477, now seen corresponding path program 1 times [2022-11-02 21:00:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:37,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860373790] [2022-11-02 21:00:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:37,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:37,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:37,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 21:00:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:38,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:38,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:38,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860373790] [2022-11-02 21:00:38,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860373790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:38,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:38,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:38,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970589671] [2022-11-02 21:00:38,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:38,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:38,340 INFO L87 Difference]: Start difference. First operand 429 states and 635 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:00:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:38,433 INFO L93 Difference]: Finished difference Result 853 states and 1266 transitions. [2022-11-02 21:00:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:00:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-02 21:00:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:38,436 INFO L225 Difference]: With dead ends: 853 [2022-11-02 21:00:38,437 INFO L226 Difference]: Without dead ends: 432 [2022-11-02 21:00:38,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 21:00:38,440 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1222 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:38,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 649 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-02 21:00:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 429. [2022-11-02 21:00:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 421 states have (on average 1.482185273159145) internal successors, (624), 422 states have internal predecessors, (624), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:00:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 634 transitions. [2022-11-02 21:00:38,464 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 634 transitions. Word has length 19 [2022-11-02 21:00:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:38,464 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 634 transitions. [2022-11-02 21:00:38,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:00:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 634 transitions. [2022-11-02 21:00:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 21:00:38,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:38,465 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:38,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:38,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:38,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash -692279149, now seen corresponding path program 1 times [2022-11-02 21:00:38,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:38,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124461210] [2022-11-02 21:00:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:38,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:38,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 21:00:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:39,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:39,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:39,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:39,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124461210] [2022-11-02 21:00:39,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124461210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:39,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:39,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748939232] [2022-11-02 21:00:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:39,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:39,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:39,322 INFO L87 Difference]: Start difference. First operand 429 states and 634 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:00:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:39,415 INFO L93 Difference]: Finished difference Result 855 states and 1266 transitions. [2022-11-02 21:00:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:00:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-02 21:00:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:39,418 INFO L225 Difference]: With dead ends: 855 [2022-11-02 21:00:39,419 INFO L226 Difference]: Without dead ends: 434 [2022-11-02 21:00:39,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 21:00:39,422 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1218 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:39,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 650 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-02 21:00:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 429. [2022-11-02 21:00:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 421 states have (on average 1.479809976247031) internal successors, (623), 422 states have internal predecessors, (623), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:00:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 633 transitions. [2022-11-02 21:00:39,441 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 633 transitions. Word has length 19 [2022-11-02 21:00:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:39,442 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 633 transitions. [2022-11-02 21:00:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:00:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 633 transitions. [2022-11-02 21:00:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 21:00:39,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:39,443 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:39,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:39,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:39,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash -635020847, now seen corresponding path program 1 times [2022-11-02 21:00:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:39,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460148058] [2022-11-02 21:00:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:39,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:39,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:39,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:39,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 21:00:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:00:40,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:40,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:40,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460148058] [2022-11-02 21:00:40,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460148058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:40,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:40,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:00:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160906635] [2022-11-02 21:00:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:40,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:00:40,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:00:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:00:40,423 INFO L87 Difference]: Start difference. First operand 429 states and 633 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:00:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:41,313 INFO L93 Difference]: Finished difference Result 443 states and 648 transitions. [2022-11-02 21:00:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:00:41,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-02 21:00:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:41,316 INFO L225 Difference]: With dead ends: 443 [2022-11-02 21:00:41,316 INFO L226 Difference]: Without dead ends: 441 [2022-11-02 21:00:41,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:00:41,318 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 12 mSDsluCounter, 4596 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5219 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:41,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5219 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 18 Unchecked, 0.7s Time] [2022-11-02 21:00:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-02 21:00:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2022-11-02 21:00:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 431 states have (on average 1.4709976798143851) internal successors, (634), 432 states have internal predecessors, (634), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:00:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 646 transitions. [2022-11-02 21:00:41,342 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 646 transitions. Word has length 19 [2022-11-02 21:00:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:41,344 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 646 transitions. [2022-11-02 21:00:41,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:00:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 646 transitions. [2022-11-02 21:00:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:00:41,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:41,346 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:41,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:41,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash 864309329, now seen corresponding path program 1 times [2022-11-02 21:00:41,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:41,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497991134] [2022-11-02 21:00:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:41,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:41,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:41,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:41,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 21:00:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 21:00:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:42,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:42,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:42,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497991134] [2022-11-02 21:00:42,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497991134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:42,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:42,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:00:42,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808348866] [2022-11-02 21:00:42,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:42,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:00:42,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:42,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:00:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:00:42,310 INFO L87 Difference]: Start difference. First operand 441 states and 646 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:00:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:42,746 INFO L93 Difference]: Finished difference Result 449 states and 654 transitions. [2022-11-02 21:00:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:00:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-02 21:00:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:42,749 INFO L225 Difference]: With dead ends: 449 [2022-11-02 21:00:42,749 INFO L226 Difference]: Without dead ends: 447 [2022-11-02 21:00:42,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:42,750 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 7 mSDsluCounter, 2409 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3036 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:42,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 3036 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2022-11-02 21:00:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-02 21:00:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2022-11-02 21:00:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 435 states have (on average 1.4666666666666666) internal successors, (638), 436 states have internal predecessors, (638), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:00:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 652 transitions. [2022-11-02 21:00:42,767 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 652 transitions. Word has length 25 [2022-11-02 21:00:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:42,768 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 652 transitions. [2022-11-02 21:00:42,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:00:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 652 transitions. [2022-11-02 21:00:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:42,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:42,769 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-02 21:00:42,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:42,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2095576135, now seen corresponding path program 1 times [2022-11-02 21:00:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:42,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772983146] [2022-11-02 21:00:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:42,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:42,987 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:42,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 21:00:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:43,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:43,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772983146] [2022-11-02 21:00:43,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772983146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:43,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:43,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:43,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63844739] [2022-11-02 21:00:43,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:43,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:43,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:43,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:43,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:43,565 INFO L87 Difference]: Start difference. First operand 447 states and 652 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:00:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:43,674 INFO L93 Difference]: Finished difference Result 869 states and 1278 transitions. [2022-11-02 21:00:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:00:43,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-02 21:00:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:43,678 INFO L225 Difference]: With dead ends: 869 [2022-11-02 21:00:43,680 INFO L226 Difference]: Without dead ends: 448 [2022-11-02 21:00:43,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 21:00:43,687 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 1212 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:43,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 665 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-02 21:00:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2022-11-02 21:00:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 435 states have (on average 1.464367816091954) internal successors, (637), 436 states have internal predecessors, (637), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:00:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 651 transitions. [2022-11-02 21:00:43,705 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 651 transitions. Word has length 37 [2022-11-02 21:00:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:43,705 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 651 transitions. [2022-11-02 21:00:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:00:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 651 transitions. [2022-11-02 21:00:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:43,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:43,709 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-02 21:00:43,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:43,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1806364151, now seen corresponding path program 1 times [2022-11-02 21:00:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:43,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606785767] [2022-11-02 21:00:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:43,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:43,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:43,931 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:43,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 21:00:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:44,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:44,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606785767] [2022-11-02 21:00:44,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606785767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:44,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:44,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811861091] [2022-11-02 21:00:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:44,474 INFO L87 Difference]: Start difference. First operand 447 states and 651 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:00:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:44,580 INFO L93 Difference]: Finished difference Result 873 states and 1281 transitions. [2022-11-02 21:00:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:00:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-02 21:00:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:44,582 INFO L225 Difference]: With dead ends: 873 [2022-11-02 21:00:44,582 INFO L226 Difference]: Without dead ends: 452 [2022-11-02 21:00:44,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 21:00:44,584 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 1206 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:44,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 670 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-02 21:00:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 447. [2022-11-02 21:00:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 435 states have (on average 1.4620689655172414) internal successors, (636), 436 states have internal predecessors, (636), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:00:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 650 transitions. [2022-11-02 21:00:44,599 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 650 transitions. Word has length 37 [2022-11-02 21:00:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:44,599 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 650 transitions. [2022-11-02 21:00:44,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:00:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 650 transitions. [2022-11-02 21:00:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:44,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:44,601 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-02 21:00:44,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:44,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:44,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1863622453, now seen corresponding path program 1 times [2022-11-02 21:00:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:44,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087269870] [2022-11-02 21:00:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:44,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:44,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:44,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:44,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 21:00:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 21:00:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:46,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:46,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087269870] [2022-11-02 21:00:46,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087269870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:46,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:46,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 21:00:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23337614] [2022-11-02 21:00:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:46,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:00:46,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:00:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:00:46,139 INFO L87 Difference]: Start difference. First operand 447 states and 650 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:00:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:48,552 INFO L93 Difference]: Finished difference Result 871 states and 1276 transitions. [2022-11-02 21:00:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:00:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-02 21:00:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:48,556 INFO L225 Difference]: With dead ends: 871 [2022-11-02 21:00:48,556 INFO L226 Difference]: Without dead ends: 869 [2022-11-02 21:00:48,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:00:48,558 INFO L413 NwaCegarLoop]: 1137 mSDtfsCounter, 3023 mSDsluCounter, 9279 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3025 SdHoareTripleChecker+Valid, 10416 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:48,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3025 Valid, 10416 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1329 Invalid, 0 Unknown, 113 Unchecked, 2.0s Time] [2022-11-02 21:00:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-02 21:00:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 459. [2022-11-02 21:00:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 445 states have (on average 1.4539325842696629) internal successors, (647), 446 states have internal predecessors, (647), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 663 transitions. [2022-11-02 21:00:48,578 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 663 transitions. Word has length 37 [2022-11-02 21:00:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:48,579 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 663 transitions. [2022-11-02 21:00:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:00:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 663 transitions. [2022-11-02 21:00:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:48,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:48,580 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-02 21:00:48,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:48,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1621998217, now seen corresponding path program 1 times [2022-11-02 21:00:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483472350] [2022-11-02 21:00:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:48,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:48,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 21:00:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:00:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:49,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:49,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483472350] [2022-11-02 21:00:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483472350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:49,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:49,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257167172] [2022-11-02 21:00:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:49,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:49,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:49,340 INFO L87 Difference]: Start difference. First operand 459 states and 663 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:00:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:49,432 INFO L93 Difference]: Finished difference Result 880 states and 1286 transitions. [2022-11-02 21:00:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:00:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-02 21:00:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:49,435 INFO L225 Difference]: With dead ends: 880 [2022-11-02 21:00:49,435 INFO L226 Difference]: Without dead ends: 459 [2022-11-02 21:00:49,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 21:00:49,437 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 1206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:49,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 665 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-02 21:00:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2022-11-02 21:00:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 445 states have (on average 1.449438202247191) internal successors, (645), 446 states have internal predecessors, (645), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 661 transitions. [2022-11-02 21:00:49,456 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 661 transitions. Word has length 37 [2022-11-02 21:00:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:49,456 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 661 transitions. [2022-11-02 21:00:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:00:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 661 transitions. [2022-11-02 21:00:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:00:49,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:49,464 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:49,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:49,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1061686856, now seen corresponding path program 1 times [2022-11-02 21:00:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917569212] [2022-11-02 21:00:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:49,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:49,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:49,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 21:00:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:00:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:00:51,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:51,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:51,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917569212] [2022-11-02 21:00:51,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917569212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:51,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:51,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:00:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31279333] [2022-11-02 21:00:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:51,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:00:51,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:00:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:51,022 INFO L87 Difference]: Start difference. First operand 459 states and 661 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:51,255 INFO L93 Difference]: Finished difference Result 1710 states and 2516 transitions. [2022-11-02 21:00:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:00:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:00:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:51,261 INFO L225 Difference]: With dead ends: 1710 [2022-11-02 21:00:51,261 INFO L226 Difference]: Without dead ends: 1289 [2022-11-02 21:00:51,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:51,263 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 2408 mSDsluCounter, 3057 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2412 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:51,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2412 Valid, 3705 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-02 21:00:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 463. [2022-11-02 21:00:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 449 states have (on average 1.447661469933185) internal successors, (650), 449 states have internal predecessors, (650), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 666 transitions. [2022-11-02 21:00:51,287 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 666 transitions. Word has length 438 [2022-11-02 21:00:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:51,287 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 666 transitions. [2022-11-02 21:00:51,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 666 transitions. [2022-11-02 21:00:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:00:51,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:51,296 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:51,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:51,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:51,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 794278730, now seen corresponding path program 1 times [2022-11-02 21:00:51,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:51,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847249300] [2022-11-02 21:00:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:51,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:51,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 21:00:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:52,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:00:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:00:52,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:52,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:52,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847249300] [2022-11-02 21:00:52,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847249300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:52,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:52,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:00:53,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108818] [2022-11-02 21:00:53,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:00:53,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:00:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:53,002 INFO L87 Difference]: Start difference. First operand 463 states and 666 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:53,329 INFO L93 Difference]: Finished difference Result 1710 states and 2515 transitions. [2022-11-02 21:00:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:00:53,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:00:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:53,336 INFO L225 Difference]: With dead ends: 1710 [2022-11-02 21:00:53,336 INFO L226 Difference]: Without dead ends: 1289 [2022-11-02 21:00:53,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:53,338 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 2401 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:53,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2405 Valid, 3680 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-02 21:00:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 465. [2022-11-02 21:00:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 451 states have (on average 1.4456762749445675) internal successors, (652), 451 states have internal predecessors, (652), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 668 transitions. [2022-11-02 21:00:53,362 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 668 transitions. Word has length 438 [2022-11-02 21:00:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:53,362 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 668 transitions. [2022-11-02 21:00:53,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 668 transitions. [2022-11-02 21:00:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:00:53,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:53,371 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:53,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:53,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:53,599 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -502087476, now seen corresponding path program 1 times [2022-11-02 21:00:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:53,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834249046] [2022-11-02 21:00:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:53,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:53,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 21:00:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:00:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:00:54,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:54,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:54,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834249046] [2022-11-02 21:00:54,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834249046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:54,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:54,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:00:54,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399550981] [2022-11-02 21:00:54,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:54,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:00:54,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:54,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:00:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:54,887 INFO L87 Difference]: Start difference. First operand 465 states and 668 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:55,116 INFO L93 Difference]: Finished difference Result 1710 states and 2514 transitions. [2022-11-02 21:00:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:00:55,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:00:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:55,121 INFO L225 Difference]: With dead ends: 1710 [2022-11-02 21:00:55,122 INFO L226 Difference]: Without dead ends: 1289 [2022-11-02 21:00:55,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:55,124 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 2394 mSDsluCounter, 3045 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:55,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 3697 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-02 21:00:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 467. [2022-11-02 21:00:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 453 states have (on average 1.4437086092715232) internal successors, (654), 453 states have internal predecessors, (654), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 670 transitions. [2022-11-02 21:00:55,146 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 670 transitions. Word has length 438 [2022-11-02 21:00:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:55,146 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 670 transitions. [2022-11-02 21:00:55,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 670 transitions. [2022-11-02 21:00:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:00:55,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:55,155 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:55,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:55,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:55,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1668628174, now seen corresponding path program 1 times [2022-11-02 21:00:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448156655] [2022-11-02 21:00:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:55,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:55,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:55,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 21:00:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:00:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:00:56,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:56,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:56,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448156655] [2022-11-02 21:00:56,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448156655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:56,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:56,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:00:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053492649] [2022-11-02 21:00:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:56,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:00:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:00:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:56,680 INFO L87 Difference]: Start difference. First operand 467 states and 670 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:56,974 INFO L93 Difference]: Finished difference Result 1710 states and 2513 transitions. [2022-11-02 21:00:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:00:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:00:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:56,980 INFO L225 Difference]: With dead ends: 1710 [2022-11-02 21:00:56,980 INFO L226 Difference]: Without dead ends: 1289 [2022-11-02 21:00:56,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:56,982 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 2387 mSDsluCounter, 3026 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2391 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:56,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2391 Valid, 3672 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-02 21:00:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 469. [2022-11-02 21:00:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 455 states have (on average 1.4417582417582417) internal successors, (656), 455 states have internal predecessors, (656), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 672 transitions. [2022-11-02 21:00:57,017 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 672 transitions. Word has length 438 [2022-11-02 21:00:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:57,018 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 672 transitions. [2022-11-02 21:00:57,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 672 transitions. [2022-11-02 21:00:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:00:57,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:57,027 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:57,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:57,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:57,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash -805087920, now seen corresponding path program 1 times [2022-11-02 21:00:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:57,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405020822] [2022-11-02 21:00:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:57,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:57,255 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:57,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 21:00:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:58,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:00:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:00:58,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:00:58,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:00:58,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405020822] [2022-11-02 21:00:58,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405020822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:58,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:58,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:00:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993057549] [2022-11-02 21:00:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:58,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:00:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:00:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:00:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:58,495 INFO L87 Difference]: Start difference. First operand 469 states and 672 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:58,815 INFO L93 Difference]: Finished difference Result 1710 states and 2512 transitions. [2022-11-02 21:00:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:00:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:00:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:58,821 INFO L225 Difference]: With dead ends: 1710 [2022-11-02 21:00:58,821 INFO L226 Difference]: Without dead ends: 1289 [2022-11-02 21:00:58,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:00:58,823 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 2380 mSDsluCounter, 3020 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2384 SdHoareTripleChecker+Valid, 3668 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:58,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2384 Valid, 3668 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-02 21:00:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 471. [2022-11-02 21:00:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 457 states have (on average 1.4398249452954048) internal successors, (658), 457 states have internal predecessors, (658), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:00:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 674 transitions. [2022-11-02 21:00:58,849 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 674 transitions. Word has length 438 [2022-11-02 21:00:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:58,849 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 674 transitions. [2022-11-02 21:00:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:00:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 674 transitions. [2022-11-02 21:00:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:00:58,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:58,853 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:58,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:00:59,074 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash -691461038, now seen corresponding path program 1 times [2022-11-02 21:00:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:00:59,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110967327] [2022-11-02 21:00:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:59,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:00:59,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:00:59,078 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:00:59,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 21:01:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:00,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:00,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:00,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110967327] [2022-11-02 21:01:00,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110967327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:00,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:00,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:01:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508963298] [2022-11-02 21:01:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:01:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:01:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:01:00,591 INFO L87 Difference]: Start difference. First operand 471 states and 674 transitions. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:00,881 INFO L93 Difference]: Finished difference Result 1689 states and 2485 transitions. [2022-11-02 21:01:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:01:00,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:00,886 INFO L225 Difference]: With dead ends: 1689 [2022-11-02 21:01:00,887 INFO L226 Difference]: Without dead ends: 1268 [2022-11-02 21:01:00,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 435 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 21:01:00,890 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 1747 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:00,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1751 Valid, 2450 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-11-02 21:01:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 475. [2022-11-02 21:01:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 461 states have (on average 1.438177874186551) internal successors, (663), 461 states have internal predecessors, (663), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 679 transitions. [2022-11-02 21:01:00,922 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 679 transitions. Word has length 438 [2022-11-02 21:01:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:00,923 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 679 transitions. [2022-11-02 21:01:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 679 transitions. [2022-11-02 21:01:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:00,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:00,928 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:00,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:01,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:01,151 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -213728172, now seen corresponding path program 1 times [2022-11-02 21:01:01,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891884096] [2022-11-02 21:01:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:01,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:01,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:01,154 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:01,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 21:01:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:01:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:02,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:02,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891884096] [2022-11-02 21:01:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891884096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:02,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:02,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473741292] [2022-11-02 21:01:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:02,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:02,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:02,688 INFO L87 Difference]: Start difference. First operand 475 states and 679 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:03,752 INFO L93 Difference]: Finished difference Result 1724 states and 2531 transitions. [2022-11-02 21:01:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:03,770 INFO L225 Difference]: With dead ends: 1724 [2022-11-02 21:01:03,770 INFO L226 Difference]: Without dead ends: 1303 [2022-11-02 21:01:03,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:03,772 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 2989 mSDsluCounter, 3912 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2993 SdHoareTripleChecker+Valid, 4488 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:03,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2993 Valid, 4488 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:01:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-02 21:01:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 477. [2022-11-02 21:01:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 463 states have (on average 1.4362850971922245) internal successors, (665), 463 states have internal predecessors, (665), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 681 transitions. [2022-11-02 21:01:03,803 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 681 transitions. Word has length 438 [2022-11-02 21:01:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:03,804 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 681 transitions. [2022-11-02 21:01:03,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 681 transitions. [2022-11-02 21:01:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:03,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:03,808 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:03,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:04,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:04,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1169654570, now seen corresponding path program 1 times [2022-11-02 21:01:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:04,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676088076] [2022-11-02 21:01:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:04,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:04,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:04,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 21:01:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:05,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:05,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:05,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676088076] [2022-11-02 21:01:05,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676088076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:05,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:05,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498342365] [2022-11-02 21:01:05,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:05,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:05,322 INFO L87 Difference]: Start difference. First operand 477 states and 681 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:05,602 INFO L93 Difference]: Finished difference Result 1724 states and 2530 transitions. [2022-11-02 21:01:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:05,610 INFO L225 Difference]: With dead ends: 1724 [2022-11-02 21:01:05,610 INFO L226 Difference]: Without dead ends: 1303 [2022-11-02 21:01:05,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:05,614 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 2375 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 3669 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:05,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 3669 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-02 21:01:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 481. [2022-11-02 21:01:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 467 states have (on average 1.4346895074946466) internal successors, (670), 467 states have internal predecessors, (670), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 686 transitions. [2022-11-02 21:01:05,643 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 686 transitions. Word has length 438 [2022-11-02 21:01:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:05,644 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 686 transitions. [2022-11-02 21:01:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 686 transitions. [2022-11-02 21:01:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:05,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:05,648 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:05,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:05,875 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1703754152, now seen corresponding path program 1 times [2022-11-02 21:01:05,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:05,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187994460] [2022-11-02 21:01:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:05,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:05,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:05,878 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:05,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 21:01:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:07,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:07,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187994460] [2022-11-02 21:01:07,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187994460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:07,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:07,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47002323] [2022-11-02 21:01:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:07,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:07,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:07,255 INFO L87 Difference]: Start difference. First operand 481 states and 686 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:07,573 INFO L93 Difference]: Finished difference Result 1724 states and 2529 transitions. [2022-11-02 21:01:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:07,578 INFO L225 Difference]: With dead ends: 1724 [2022-11-02 21:01:07,578 INFO L226 Difference]: Without dead ends: 1303 [2022-11-02 21:01:07,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:07,580 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 2367 mSDsluCounter, 3000 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2371 SdHoareTripleChecker+Valid, 3665 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2371 Valid, 3665 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-02 21:01:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 483. [2022-11-02 21:01:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 469 states have (on average 1.4328358208955223) internal successors, (672), 469 states have internal predecessors, (672), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 688 transitions. [2022-11-02 21:01:07,605 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 688 transitions. Word has length 438 [2022-11-02 21:01:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:07,605 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 688 transitions. [2022-11-02 21:01:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 688 transitions. [2022-11-02 21:01:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:07,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:07,609 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:07,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:07,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:07,835 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1538946982, now seen corresponding path program 1 times [2022-11-02 21:01:07,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:07,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416223548] [2022-11-02 21:01:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:07,839 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:07,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 21:01:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:08,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:01:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:09,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:09,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416223548] [2022-11-02 21:01:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416223548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:09,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:09,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:09,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790621977] [2022-11-02 21:01:09,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:09,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:09,308 INFO L87 Difference]: Start difference. First operand 483 states and 688 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:10,366 INFO L93 Difference]: Finished difference Result 1724 states and 2528 transitions. [2022-11-02 21:01:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:10,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:10,377 INFO L225 Difference]: With dead ends: 1724 [2022-11-02 21:01:10,378 INFO L226 Difference]: Without dead ends: 1303 [2022-11-02 21:01:10,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:10,380 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 2955 mSDsluCounter, 3868 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2959 SdHoareTripleChecker+Valid, 4456 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:10,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2959 Valid, 4456 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:01:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-02 21:01:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 487. [2022-11-02 21:01:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 473 states have (on average 1.4312896405919662) internal successors, (677), 473 states have internal predecessors, (677), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 693 transitions. [2022-11-02 21:01:10,415 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 693 transitions. Word has length 438 [2022-11-02 21:01:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:10,416 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 693 transitions. [2022-11-02 21:01:10,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 693 transitions. [2022-11-02 21:01:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:10,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:10,419 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:10,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:10,639 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1581095772, now seen corresponding path program 1 times [2022-11-02 21:01:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:10,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965391266] [2022-11-02 21:01:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:10,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:10,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:10,643 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:10,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 21:01:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:01:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:11,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:11,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965391266] [2022-11-02 21:01:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965391266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:11,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:11,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772545965] [2022-11-02 21:01:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:11,954 INFO L87 Difference]: Start difference. First operand 487 states and 693 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:12,303 INFO L93 Difference]: Finished difference Result 1724 states and 2527 transitions. [2022-11-02 21:01:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:12,308 INFO L225 Difference]: With dead ends: 1724 [2022-11-02 21:01:12,309 INFO L226 Difference]: Without dead ends: 1303 [2022-11-02 21:01:12,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:12,316 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 2945 mSDsluCounter, 4148 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 4804 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:12,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2949 Valid, 4804 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-02 21:01:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 489. [2022-11-02 21:01:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 475 states have (on average 1.4294736842105262) internal successors, (679), 475 states have internal predecessors, (679), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 695 transitions. [2022-11-02 21:01:12,350 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 695 transitions. Word has length 438 [2022-11-02 21:01:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:12,351 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 695 transitions. [2022-11-02 21:01:12,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 695 transitions. [2022-11-02 21:01:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:12,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:12,355 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:12,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:12,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:12,579 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash -440236322, now seen corresponding path program 1 times [2022-11-02 21:01:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:12,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044373401] [2022-11-02 21:01:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:12,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:12,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:12,582 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:12,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 21:01:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:13,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:13,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:13,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044373401] [2022-11-02 21:01:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044373401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:13,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:13,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23460904] [2022-11-02 21:01:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:13,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:13,857 INFO L87 Difference]: Start difference. First operand 489 states and 695 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:14,136 INFO L93 Difference]: Finished difference Result 1732 states and 2538 transitions. [2022-11-02 21:01:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:14,141 INFO L225 Difference]: With dead ends: 1732 [2022-11-02 21:01:14,141 INFO L226 Difference]: Without dead ends: 1311 [2022-11-02 21:01:14,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:14,143 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 2357 mSDsluCounter, 2990 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2361 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:14,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2361 Valid, 3661 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-02 21:01:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 491. [2022-11-02 21:01:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 477 states have (on average 1.4276729559748427) internal successors, (681), 477 states have internal predecessors, (681), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 697 transitions. [2022-11-02 21:01:14,169 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 697 transitions. Word has length 438 [2022-11-02 21:01:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:14,170 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 697 transitions. [2022-11-02 21:01:14,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 697 transitions. [2022-11-02 21:01:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:14,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:14,173 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:14,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:14,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:14,400 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1859097888, now seen corresponding path program 1 times [2022-11-02 21:01:14,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:14,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123257021] [2022-11-02 21:01:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:14,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:14,403 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 21:01:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:01:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:15,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:15,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:15,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123257021] [2022-11-02 21:01:15,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123257021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:15,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:15,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:15,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254938348] [2022-11-02 21:01:15,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:15,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:15,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:15,732 INFO L87 Difference]: Start difference. First operand 491 states and 697 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:16,066 INFO L93 Difference]: Finished difference Result 1724 states and 2525 transitions. [2022-11-02 21:01:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:16,073 INFO L225 Difference]: With dead ends: 1724 [2022-11-02 21:01:16,073 INFO L226 Difference]: Without dead ends: 1303 [2022-11-02 21:01:16,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:16,075 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 2924 mSDsluCounter, 4121 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2928 SdHoareTripleChecker+Valid, 4784 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:16,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2928 Valid, 4784 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-02 21:01:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 495. [2022-11-02 21:01:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 481 states have (on average 1.4261954261954262) internal successors, (686), 481 states have internal predecessors, (686), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 702 transitions. [2022-11-02 21:01:16,100 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 702 transitions. Word has length 438 [2022-11-02 21:01:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:16,100 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 702 transitions. [2022-11-02 21:01:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 702 transitions. [2022-11-02 21:01:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:16,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:16,104 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:16,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:16,327 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1415274526, now seen corresponding path program 1 times [2022-11-02 21:01:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143740628] [2022-11-02 21:01:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:16,330 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:16,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 21:01:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:17,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:17,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:17,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143740628] [2022-11-02 21:01:17,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143740628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:17,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:17,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888081102] [2022-11-02 21:01:17,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:17,633 INFO L87 Difference]: Start difference. First operand 495 states and 702 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:17,921 INFO L93 Difference]: Finished difference Result 1742 states and 2551 transitions. [2022-11-02 21:01:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:17,927 INFO L225 Difference]: With dead ends: 1742 [2022-11-02 21:01:17,927 INFO L226 Difference]: Without dead ends: 1321 [2022-11-02 21:01:17,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:17,929 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 2357 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2361 SdHoareTripleChecker+Valid, 3652 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:17,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2361 Valid, 3652 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-11-02 21:01:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 497. [2022-11-02 21:01:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 483 states have (on average 1.4244306418219461) internal successors, (688), 483 states have internal predecessors, (688), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 704 transitions. [2022-11-02 21:01:17,956 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 704 transitions. Word has length 438 [2022-11-02 21:01:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:17,956 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 704 transitions. [2022-11-02 21:01:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 704 transitions. [2022-11-02 21:01:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:17,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:17,960 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:17,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:18,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:18,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1749429604, now seen corresponding path program 1 times [2022-11-02 21:01:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:18,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293463769] [2022-11-02 21:01:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:18,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:18,187 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:18,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 21:01:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:01:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:19,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:19,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:19,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293463769] [2022-11-02 21:01:19,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293463769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:19,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:19,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:01:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66251974] [2022-11-02 21:01:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:19,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:01:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:19,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:01:19,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:01:19,543 INFO L87 Difference]: Start difference. First operand 497 states and 704 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:20,475 INFO L93 Difference]: Finished difference Result 2616 states and 3846 transitions. [2022-11-02 21:01:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:01:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:20,482 INFO L225 Difference]: With dead ends: 2616 [2022-11-02 21:01:20,483 INFO L226 Difference]: Without dead ends: 2195 [2022-11-02 21:01:20,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:01:20,485 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 5653 mSDsluCounter, 7317 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5657 SdHoareTripleChecker+Valid, 8022 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:20,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5657 Valid, 8022 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:01:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2022-11-02 21:01:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 515. [2022-11-02 21:01:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 501 states have (on average 1.4251497005988023) internal successors, (714), 501 states have internal predecessors, (714), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 730 transitions. [2022-11-02 21:01:20,537 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 730 transitions. Word has length 438 [2022-11-02 21:01:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:20,537 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 730 transitions. [2022-11-02 21:01:20,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 730 transitions. [2022-11-02 21:01:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:20,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:20,541 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:20,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:20,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:20,767 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -879676570, now seen corresponding path program 1 times [2022-11-02 21:01:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:20,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358850729] [2022-11-02 21:01:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:20,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:20,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:20,772 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:20,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 21:01:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:21,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:22,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:22,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:22,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358850729] [2022-11-02 21:01:22,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358850729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:22,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:22,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149912500] [2022-11-02 21:01:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:22,225 INFO L87 Difference]: Start difference. First operand 515 states and 730 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:22,570 INFO L93 Difference]: Finished difference Result 1807 states and 2643 transitions. [2022-11-02 21:01:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:22,576 INFO L225 Difference]: With dead ends: 1807 [2022-11-02 21:01:22,576 INFO L226 Difference]: Without dead ends: 1368 [2022-11-02 21:01:22,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:22,578 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 2343 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 3665 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:22,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2347 Valid, 3665 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:01:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-11-02 21:01:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 519. [2022-11-02 21:01:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 505 states have (on average 1.4217821782178217) internal successors, (718), 505 states have internal predecessors, (718), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 734 transitions. [2022-11-02 21:01:22,619 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 734 transitions. Word has length 438 [2022-11-02 21:01:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:22,619 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 734 transitions. [2022-11-02 21:01:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 734 transitions. [2022-11-02 21:01:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:22,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:22,625 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:22,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:22,846 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 176804328, now seen corresponding path program 1 times [2022-11-02 21:01:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:22,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910487127] [2022-11-02 21:01:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:22,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:22,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:22,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 21:01:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:01:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:24,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:24,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:24,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910487127] [2022-11-02 21:01:24,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910487127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:24,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:24,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080270200] [2022-11-02 21:01:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:24,175 INFO L87 Difference]: Start difference. First operand 519 states and 734 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:24,500 INFO L93 Difference]: Finished difference Result 1778 states and 2599 transitions. [2022-11-02 21:01:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:24,504 INFO L225 Difference]: With dead ends: 1778 [2022-11-02 21:01:24,504 INFO L226 Difference]: Without dead ends: 1339 [2022-11-02 21:01:24,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:24,505 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 2892 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2896 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:24,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2896 Valid, 4751 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-11-02 21:01:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 521. [2022-11-02 21:01:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 507 states have (on average 1.4201183431952662) internal successors, (720), 507 states have internal predecessors, (720), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 736 transitions. [2022-11-02 21:01:24,533 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 736 transitions. Word has length 438 [2022-11-02 21:01:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:24,533 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 736 transitions. [2022-11-02 21:01:24,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 736 transitions. [2022-11-02 21:01:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:24,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:24,537 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:24,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-02 21:01:24,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:24,754 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 213657834, now seen corresponding path program 1 times [2022-11-02 21:01:24,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139280412] [2022-11-02 21:01:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:24,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:24,758 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:24,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 21:01:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:25,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:26,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:26,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:26,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139280412] [2022-11-02 21:01:26,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139280412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:26,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:26,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:26,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954444230] [2022-11-02 21:01:26,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:26,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:26,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:26,099 INFO L87 Difference]: Start difference. First operand 521 states and 736 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:26,387 INFO L93 Difference]: Finished difference Result 1822 states and 2663 transitions. [2022-11-02 21:01:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:26,391 INFO L225 Difference]: With dead ends: 1822 [2022-11-02 21:01:26,392 INFO L226 Difference]: Without dead ends: 1383 [2022-11-02 21:01:26,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:26,393 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 2344 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2348 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:26,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2348 Valid, 3644 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-02 21:01:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 523. [2022-11-02 21:01:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 509 states have (on average 1.418467583497053) internal successors, (722), 509 states have internal predecessors, (722), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 738 transitions. [2022-11-02 21:01:26,444 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 738 transitions. Word has length 438 [2022-11-02 21:01:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:26,445 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 738 transitions. [2022-11-02 21:01:26,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 738 transitions. [2022-11-02 21:01:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:26,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:26,448 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:26,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:26,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:26,670 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1849448556, now seen corresponding path program 1 times [2022-11-02 21:01:26,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:26,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559343530] [2022-11-02 21:01:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:26,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:26,674 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:26,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 21:01:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:27,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:01:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:27,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:27,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559343530] [2022-11-02 21:01:27,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559343530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:27,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:27,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:01:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994406106] [2022-11-02 21:01:27,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:27,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:01:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:01:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:01:27,958 INFO L87 Difference]: Start difference. First operand 523 states and 738 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:28,875 INFO L93 Difference]: Finished difference Result 2650 states and 3890 transitions. [2022-11-02 21:01:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:01:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:28,879 INFO L225 Difference]: With dead ends: 2650 [2022-11-02 21:01:28,879 INFO L226 Difference]: Without dead ends: 2211 [2022-11-02 21:01:28,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:01:28,881 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 6741 mSDsluCounter, 7361 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6745 SdHoareTripleChecker+Valid, 8087 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:28,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6745 Valid, 8087 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:01:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2022-11-02 21:01:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 531. [2022-11-02 21:01:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 517 states have (on average 1.4177949709864603) internal successors, (733), 517 states have internal predecessors, (733), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 749 transitions. [2022-11-02 21:01:28,913 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 749 transitions. Word has length 438 [2022-11-02 21:01:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:28,913 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 749 transitions. [2022-11-02 21:01:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 749 transitions. [2022-11-02 21:01:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:28,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:28,917 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:28,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:29,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:29,144 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash 27689070, now seen corresponding path program 1 times [2022-11-02 21:01:29,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:29,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073369214] [2022-11-02 21:01:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:29,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:29,147 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:29,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 21:01:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:30,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:30,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:30,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:30,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073369214] [2022-11-02 21:01:30,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073369214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:30,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:30,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103261178] [2022-11-02 21:01:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:30,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:30,442 INFO L87 Difference]: Start difference. First operand 531 states and 749 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:30,742 INFO L93 Difference]: Finished difference Result 1802 states and 2629 transitions. [2022-11-02 21:01:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:30,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:30,745 INFO L225 Difference]: With dead ends: 1802 [2022-11-02 21:01:30,745 INFO L226 Difference]: Without dead ends: 1355 [2022-11-02 21:01:30,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:30,747 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 2281 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 3622 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:30,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2285 Valid, 3622 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-11-02 21:01:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 535. [2022-11-02 21:01:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 521 states have (on average 1.4145873320537428) internal successors, (737), 521 states have internal predecessors, (737), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 753 transitions. [2022-11-02 21:01:30,775 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 753 transitions. Word has length 438 [2022-11-02 21:01:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:30,776 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 753 transitions. [2022-11-02 21:01:30,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 753 transitions. [2022-11-02 21:01:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:30,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:30,779 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:30,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-02 21:01:31,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:31,002 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash -769736464, now seen corresponding path program 1 times [2022-11-02 21:01:31,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:31,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171570393] [2022-11-02 21:01:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:31,006 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:31,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 21:01:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:01:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:32,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:32,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:32,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171570393] [2022-11-02 21:01:32,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171570393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:32,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:32,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:32,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745407861] [2022-11-02 21:01:32,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:32,269 INFO L87 Difference]: Start difference. First operand 535 states and 753 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:32,619 INFO L93 Difference]: Finished difference Result 1802 states and 2628 transitions. [2022-11-02 21:01:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:32,621 INFO L225 Difference]: With dead ends: 1802 [2022-11-02 21:01:32,621 INFO L226 Difference]: Without dead ends: 1355 [2022-11-02 21:01:32,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:32,622 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 2855 mSDsluCounter, 4035 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2859 SdHoareTripleChecker+Valid, 4717 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:32,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2859 Valid, 4717 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-11-02 21:01:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 539. [2022-11-02 21:01:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 525 states have (on average 1.4133333333333333) internal successors, (742), 525 states have internal predecessors, (742), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 758 transitions. [2022-11-02 21:01:32,650 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 758 transitions. Word has length 438 [2022-11-02 21:01:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:32,651 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 758 transitions. [2022-11-02 21:01:32,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 758 transitions. [2022-11-02 21:01:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:32,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:32,654 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:32,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:32,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:32,878 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash 708809330, now seen corresponding path program 1 times [2022-11-02 21:01:32,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:32,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764928080] [2022-11-02 21:01:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:32,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:32,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:32,883 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:32,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 21:01:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:33,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:34,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:34,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:34,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764928080] [2022-11-02 21:01:34,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764928080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:34,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:34,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249102873] [2022-11-02 21:01:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:34,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:34,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:34,187 INFO L87 Difference]: Start difference. First operand 539 states and 758 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:34,477 INFO L93 Difference]: Finished difference Result 1862 states and 2715 transitions. [2022-11-02 21:01:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:34,480 INFO L225 Difference]: With dead ends: 1862 [2022-11-02 21:01:34,480 INFO L226 Difference]: Without dead ends: 1415 [2022-11-02 21:01:34,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:34,486 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 2327 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:34,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 3651 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-02 21:01:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 541. [2022-11-02 21:01:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 527 states have (on average 1.411764705882353) internal successors, (744), 527 states have internal predecessors, (744), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 760 transitions. [2022-11-02 21:01:34,517 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 760 transitions. Word has length 438 [2022-11-02 21:01:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:34,518 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 760 transitions. [2022-11-02 21:01:34,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 760 transitions. [2022-11-02 21:01:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:34,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:34,522 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:34,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-02 21:01:34,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:34,729 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash -938812300, now seen corresponding path program 1 times [2022-11-02 21:01:34,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:34,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443603108] [2022-11-02 21:01:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:34,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:34,732 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:34,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-02 21:01:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:36,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:36,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443603108] [2022-11-02 21:01:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443603108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:36,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:36,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901874351] [2022-11-02 21:01:36,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:36,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:36,090 INFO L87 Difference]: Start difference. First operand 541 states and 760 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:36,449 INFO L93 Difference]: Finished difference Result 1811 states and 2639 transitions. [2022-11-02 21:01:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:36,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:36,451 INFO L225 Difference]: With dead ends: 1811 [2022-11-02 21:01:36,451 INFO L226 Difference]: Without dead ends: 1364 [2022-11-02 21:01:36,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:36,452 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 2859 mSDsluCounter, 4082 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2863 SdHoareTripleChecker+Valid, 4783 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:36,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2863 Valid, 4783 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:01:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-11-02 21:01:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 543. [2022-11-02 21:01:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 529 states have (on average 1.4102079395085065) internal successors, (746), 529 states have internal predecessors, (746), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 762 transitions. [2022-11-02 21:01:36,482 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 762 transitions. Word has length 438 [2022-11-02 21:01:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:36,482 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 762 transitions. [2022-11-02 21:01:36,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 762 transitions. [2022-11-02 21:01:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:36,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:36,486 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:36,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-02 21:01:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:36,702 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1396392202, now seen corresponding path program 1 times [2022-11-02 21:01:36,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:36,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913903423] [2022-11-02 21:01:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:36,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:36,706 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:36,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 21:01:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:37,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:01:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:38,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:38,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913903423] [2022-11-02 21:01:38,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913903423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:38,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:38,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341963546] [2022-11-02 21:01:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:38,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:38,126 INFO L87 Difference]: Start difference. First operand 543 states and 762 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:39,127 INFO L93 Difference]: Finished difference Result 1802 states and 2625 transitions. [2022-11-02 21:01:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:39,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:39,130 INFO L225 Difference]: With dead ends: 1802 [2022-11-02 21:01:39,130 INFO L226 Difference]: Without dead ends: 1355 [2022-11-02 21:01:39,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:39,131 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 2828 mSDsluCounter, 3724 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2832 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:39,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2832 Valid, 4349 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:01:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-11-02 21:01:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 547. [2022-11-02 21:01:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 533 states have (on average 1.4090056285178236) internal successors, (751), 533 states have internal predecessors, (751), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 767 transitions. [2022-11-02 21:01:39,153 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 767 transitions. Word has length 438 [2022-11-02 21:01:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:39,154 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 767 transitions. [2022-11-02 21:01:39,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 767 transitions. [2022-11-02 21:01:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:39,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:39,157 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:39,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-02 21:01:39,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:39,374 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 793260664, now seen corresponding path program 1 times [2022-11-02 21:01:39,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:39,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622730668] [2022-11-02 21:01:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:39,378 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:39,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-02 21:01:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:40,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:01:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:40,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:40,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622730668] [2022-11-02 21:01:40,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622730668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:40,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:40,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:40,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138275611] [2022-11-02 21:01:40,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:40,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:40,663 INFO L87 Difference]: Start difference. First operand 547 states and 767 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:41,007 INFO L93 Difference]: Finished difference Result 1802 states and 2624 transitions. [2022-11-02 21:01:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:41,010 INFO L225 Difference]: With dead ends: 1802 [2022-11-02 21:01:41,010 INFO L226 Difference]: Without dead ends: 1355 [2022-11-02 21:01:41,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:41,012 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 2818 mSDsluCounter, 3995 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2822 SdHoareTripleChecker+Valid, 4688 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:41,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2822 Valid, 4688 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-11-02 21:01:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 549. [2022-11-02 21:01:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 535 states have (on average 1.4074766355140187) internal successors, (753), 535 states have internal predecessors, (753), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 769 transitions. [2022-11-02 21:01:41,042 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 769 transitions. Word has length 438 [2022-11-02 21:01:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:41,043 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 769 transitions. [2022-11-02 21:01:41,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 769 transitions. [2022-11-02 21:01:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:41,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:41,046 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:41,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-02 21:01:41,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:41,270 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash 330735226, now seen corresponding path program 1 times [2022-11-02 21:01:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945358074] [2022-11-02 21:01:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:41,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:41,275 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:41,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 21:01:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:42,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:42,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:42,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945358074] [2022-11-02 21:01:42,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945358074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:42,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:42,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066118948] [2022-11-02 21:01:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:42,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:42,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:42,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:42,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:42,765 INFO L87 Difference]: Start difference. First operand 549 states and 769 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:43,111 INFO L93 Difference]: Finished difference Result 1831 states and 2666 transitions. [2022-11-02 21:01:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:43,113 INFO L225 Difference]: With dead ends: 1831 [2022-11-02 21:01:43,113 INFO L226 Difference]: Without dead ends: 1384 [2022-11-02 21:01:43,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:43,114 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 2258 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 3616 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:43,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 3616 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:01:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-11-02 21:01:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 553. [2022-11-02 21:01:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 539 states have (on average 1.4063079777365493) internal successors, (758), 539 states have internal predecessors, (758), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 774 transitions. [2022-11-02 21:01:43,136 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 774 transitions. Word has length 438 [2022-11-02 21:01:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:43,137 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 774 transitions. [2022-11-02 21:01:43,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 774 transitions. [2022-11-02 21:01:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:43,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:43,140 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:43,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:43,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:43,354 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash -860923012, now seen corresponding path program 1 times [2022-11-02 21:01:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:43,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596468290] [2022-11-02 21:01:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:43,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:43,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:43,358 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 21:01:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:01:44,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:44,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:44,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596468290] [2022-11-02 21:01:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596468290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:44,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:44,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:01:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654417482] [2022-11-02 21:01:44,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:44,631 INFO L87 Difference]: Start difference. First operand 553 states and 774 transitions. Second operand has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:44,963 INFO L93 Difference]: Finished difference Result 1802 states and 2622 transitions. [2022-11-02 21:01:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:01:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:44,966 INFO L225 Difference]: With dead ends: 1802 [2022-11-02 21:01:44,966 INFO L226 Difference]: Without dead ends: 1355 [2022-11-02 21:01:44,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:44,968 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 2797 mSDsluCounter, 3963 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 4663 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:44,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2801 Valid, 4663 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-11-02 21:01:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 555. [2022-11-02 21:01:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 541 states have (on average 1.4048059149722736) internal successors, (760), 541 states have internal predecessors, (760), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 776 transitions. [2022-11-02 21:01:44,999 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 776 transitions. Word has length 438 [2022-11-02 21:01:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:44,999 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 776 transitions. [2022-11-02 21:01:45,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 776 transitions. [2022-11-02 21:01:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:45,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:45,003 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:45,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:45,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:45,218 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1890094850, now seen corresponding path program 1 times [2022-11-02 21:01:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:45,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632411581] [2022-11-02 21:01:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:45,223 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:45,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-02 21:01:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:46,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:46,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632411581] [2022-11-02 21:01:46,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632411581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:46,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:46,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:46,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919521289] [2022-11-02 21:01:46,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:46,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:46,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:46,627 INFO L87 Difference]: Start difference. First operand 555 states and 776 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:46,943 INFO L93 Difference]: Finished difference Result 1880 states and 2736 transitions. [2022-11-02 21:01:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:01:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:46,946 INFO L225 Difference]: With dead ends: 1880 [2022-11-02 21:01:46,946 INFO L226 Difference]: Without dead ends: 1433 [2022-11-02 21:01:46,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:46,948 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 2308 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 3646 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:46,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 3646 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-11-02 21:01:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 557. [2022-11-02 21:01:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 543 states have (on average 1.4033149171270718) internal successors, (762), 543 states have internal predecessors, (762), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 778 transitions. [2022-11-02 21:01:46,981 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 778 transitions. Word has length 438 [2022-11-02 21:01:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:46,981 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 778 transitions. [2022-11-02 21:01:46,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 778 transitions. [2022-11-02 21:01:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:46,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:46,985 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:47,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-02 21:01:47,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:47,198 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:47,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1487601408, now seen corresponding path program 1 times [2022-11-02 21:01:47,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558800190] [2022-11-02 21:01:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:47,207 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:47,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 21:01:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:01:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:48,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:48,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558800190] [2022-11-02 21:01:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558800190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:48,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:48,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:01:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149719979] [2022-11-02 21:01:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:01:48,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:01:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:01:48,558 INFO L87 Difference]: Start difference. First operand 557 states and 778 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:49,442 INFO L93 Difference]: Finished difference Result 2710 states and 3967 transitions. [2022-11-02 21:01:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:01:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:49,447 INFO L225 Difference]: With dead ends: 2710 [2022-11-02 21:01:49,448 INFO L226 Difference]: Without dead ends: 2263 [2022-11-02 21:01:49,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:01:49,450 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 6391 mSDsluCounter, 7391 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6395 SdHoareTripleChecker+Valid, 8220 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:49,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6395 Valid, 8220 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:01:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-11-02 21:01:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 583. [2022-11-02 21:01:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 569 states have (on average 1.40597539543058) internal successors, (800), 569 states have internal predecessors, (800), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 816 transitions. [2022-11-02 21:01:49,486 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 816 transitions. Word has length 438 [2022-11-02 21:01:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:49,487 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 816 transitions. [2022-11-02 21:01:49,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 816 transitions. [2022-11-02 21:01:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:49,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:49,490 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:49,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-02 21:01:49,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:49,714 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1982735746, now seen corresponding path program 1 times [2022-11-02 21:01:49,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:49,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082137220] [2022-11-02 21:01:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:49,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:49,717 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:49,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-02 21:01:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:01:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:51,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:51,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082137220] [2022-11-02 21:01:51,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082137220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:51,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:51,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:01:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707510929] [2022-11-02 21:01:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:01:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:01:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:01:51,122 INFO L87 Difference]: Start difference. First operand 583 states and 816 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:53,037 INFO L93 Difference]: Finished difference Result 2940 states and 4297 transitions. [2022-11-02 21:01:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:01:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:53,041 INFO L225 Difference]: With dead ends: 2940 [2022-11-02 21:01:53,041 INFO L226 Difference]: Without dead ends: 2467 [2022-11-02 21:01:53,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:01:53,043 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 5614 mSDsluCounter, 5461 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5614 SdHoareTripleChecker+Valid, 6177 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:53,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5614 Valid, 6177 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:01:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-11-02 21:01:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 641. [2022-11-02 21:01:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 627 states have (on average 1.4098883572567784) internal successors, (884), 627 states have internal predecessors, (884), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 900 transitions. [2022-11-02 21:01:53,095 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 900 transitions. Word has length 438 [2022-11-02 21:01:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:53,097 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 900 transitions. [2022-11-02 21:01:53,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 900 transitions. [2022-11-02 21:01:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:53,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:53,101 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:53,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:53,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:53,322 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash 132973700, now seen corresponding path program 1 times [2022-11-02 21:01:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:53,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728909746] [2022-11-02 21:01:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:53,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:53,327 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:53,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-02 21:01:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:01:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:54,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:54,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:54,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728909746] [2022-11-02 21:01:54,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728909746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:54,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:54,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:01:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874041736] [2022-11-02 21:01:54,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:54,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:01:54,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:01:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:01:54,827 INFO L87 Difference]: Start difference. First operand 641 states and 900 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:56,780 INFO L93 Difference]: Finished difference Result 3000 states and 4382 transitions. [2022-11-02 21:01:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:01:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:01:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:56,783 INFO L225 Difference]: With dead ends: 3000 [2022-11-02 21:01:56,783 INFO L226 Difference]: Without dead ends: 2469 [2022-11-02 21:01:56,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:01:56,785 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 5530 mSDsluCounter, 5524 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5530 SdHoareTripleChecker+Valid, 6246 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:56,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5530 Valid, 6246 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:01:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-11-02 21:01:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 643. [2022-11-02 21:01:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 629 states have (on average 1.4085850556438793) internal successors, (886), 629 states have internal predecessors, (886), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:01:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 902 transitions. [2022-11-02 21:01:56,824 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 902 transitions. Word has length 438 [2022-11-02 21:01:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:56,825 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 902 transitions. [2022-11-02 21:01:56,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:01:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 902 transitions. [2022-11-02 21:01:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:01:56,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:56,828 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:56,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:57,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:57,042 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 41663494, now seen corresponding path program 1 times [2022-11-02 21:01:57,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:57,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225057600] [2022-11-02 21:01:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:57,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:57,047 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:57,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-02 21:01:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:01:58,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:58,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:58,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:58,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225057600] [2022-11-02 21:01:58,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225057600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:58,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:58,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:01:58,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83563521] [2022-11-02 21:01:58,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:01:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:01:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:01:58,587 INFO L87 Difference]: Start difference. First operand 643 states and 902 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:00,530 INFO L93 Difference]: Finished difference Result 3004 states and 4385 transitions. [2022-11-02 21:02:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:00,532 INFO L225 Difference]: With dead ends: 3004 [2022-11-02 21:02:00,532 INFO L226 Difference]: Without dead ends: 2471 [2022-11-02 21:02:00,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:00,534 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 5527 mSDsluCounter, 5540 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5527 SdHoareTripleChecker+Valid, 6266 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:00,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5527 Valid, 6266 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-11-02 21:02:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 645. [2022-11-02 21:02:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 631 states have (on average 1.4072900158478605) internal successors, (888), 631 states have internal predecessors, (888), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 904 transitions. [2022-11-02 21:02:00,560 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 904 transitions. Word has length 438 [2022-11-02 21:02:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:00,560 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 904 transitions. [2022-11-02 21:02:00,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 904 transitions. [2022-11-02 21:02:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:00,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:00,564 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:00,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:00,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:00,773 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1326027768, now seen corresponding path program 1 times [2022-11-02 21:02:00,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487369912] [2022-11-02 21:02:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:00,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:00,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:00,776 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:00,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-02 21:02:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:01,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:02,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:02,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487369912] [2022-11-02 21:02:02,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487369912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:02,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:02,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:02,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175224708] [2022-11-02 21:02:02,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:02,283 INFO L87 Difference]: Start difference. First operand 645 states and 904 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:04,250 INFO L93 Difference]: Finished difference Result 3008 states and 4388 transitions. [2022-11-02 21:02:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:04,252 INFO L225 Difference]: With dead ends: 3008 [2022-11-02 21:02:04,253 INFO L226 Difference]: Without dead ends: 2473 [2022-11-02 21:02:04,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:04,254 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 5565 mSDsluCounter, 5486 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5565 SdHoareTripleChecker+Valid, 6216 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:04,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5565 Valid, 6216 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-11-02 21:02:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 647. [2022-11-02 21:02:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 633 states have (on average 1.4060031595576619) internal successors, (890), 633 states have internal predecessors, (890), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 906 transitions. [2022-11-02 21:02:04,288 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 906 transitions. Word has length 438 [2022-11-02 21:02:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:04,289 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 906 transitions. [2022-11-02 21:02:04,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 906 transitions. [2022-11-02 21:02:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:04,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:04,291 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:04,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-02 21:02:04,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:04,492 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1224657782, now seen corresponding path program 1 times [2022-11-02 21:02:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:04,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544020931] [2022-11-02 21:02:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:04,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:04,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:04,495 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-02 21:02:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:05,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:05,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544020931] [2022-11-02 21:02:05,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544020931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:05,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:05,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:05,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205168073] [2022-11-02 21:02:05,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:05,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:05,983 INFO L87 Difference]: Start difference. First operand 647 states and 906 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:07,955 INFO L93 Difference]: Finished difference Result 3014 states and 4394 transitions. [2022-11-02 21:02:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:07,958 INFO L225 Difference]: With dead ends: 3014 [2022-11-02 21:02:07,958 INFO L226 Difference]: Without dead ends: 2477 [2022-11-02 21:02:07,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:07,960 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 5539 mSDsluCounter, 5503 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5539 SdHoareTripleChecker+Valid, 6243 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:07,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5539 Valid, 6243 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2022-11-02 21:02:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 651. [2022-11-02 21:02:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 637 states have (on average 1.4050235478806907) internal successors, (895), 637 states have internal predecessors, (895), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 911 transitions. [2022-11-02 21:02:08,000 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 911 transitions. Word has length 438 [2022-11-02 21:02:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:08,001 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 911 transitions. [2022-11-02 21:02:08,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 911 transitions. [2022-11-02 21:02:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:08,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:08,004 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:08,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:08,226 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1019703796, now seen corresponding path program 1 times [2022-11-02 21:02:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:08,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371267289] [2022-11-02 21:02:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:08,232 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:08,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-02 21:02:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:10,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:10,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:10,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371267289] [2022-11-02 21:02:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371267289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:10,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:10,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:10,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527969866] [2022-11-02 21:02:10,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:10,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:10,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:10,045 INFO L87 Difference]: Start difference. First operand 651 states and 911 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:11,924 INFO L93 Difference]: Finished difference Result 3020 states and 4400 transitions. [2022-11-02 21:02:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:11,926 INFO L225 Difference]: With dead ends: 3020 [2022-11-02 21:02:11,926 INFO L226 Difference]: Without dead ends: 2479 [2022-11-02 21:02:11,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:11,927 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 5840 mSDsluCounter, 5345 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5840 SdHoareTripleChecker+Valid, 6089 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:11,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5840 Valid, 6089 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 21:02:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-11-02 21:02:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 653. [2022-11-02 21:02:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 639 states have (on average 1.403755868544601) internal successors, (897), 639 states have internal predecessors, (897), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 913 transitions. [2022-11-02 21:02:11,955 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 913 transitions. Word has length 438 [2022-11-02 21:02:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:11,956 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 913 transitions. [2022-11-02 21:02:11,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 913 transitions. [2022-11-02 21:02:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:11,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:11,959 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:11,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-02 21:02:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:12,165 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1189322738, now seen corresponding path program 1 times [2022-11-02 21:02:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:12,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653962034] [2022-11-02 21:02:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:12,169 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:12,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-02 21:02:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:13,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:13,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:13,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:13,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653962034] [2022-11-02 21:02:13,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653962034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:13,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:13,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:13,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957705102] [2022-11-02 21:02:13,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:13,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:13,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:13,744 INFO L87 Difference]: Start difference. First operand 653 states and 913 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:15,722 INFO L93 Difference]: Finished difference Result 3024 states and 4403 transitions. [2022-11-02 21:02:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:15,724 INFO L225 Difference]: With dead ends: 3024 [2022-11-02 21:02:15,724 INFO L226 Difference]: Without dead ends: 2481 [2022-11-02 21:02:15,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:15,726 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 5564 mSDsluCounter, 5489 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5564 SdHoareTripleChecker+Valid, 6237 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:15,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5564 Valid, 6237 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2022-11-02 21:02:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 655. [2022-11-02 21:02:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 641 states have (on average 1.4024960998439937) internal successors, (899), 641 states have internal predecessors, (899), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 915 transitions. [2022-11-02 21:02:15,751 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 915 transitions. Word has length 438 [2022-11-02 21:02:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:15,751 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 915 transitions. [2022-11-02 21:02:15,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 915 transitions. [2022-11-02 21:02:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:15,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:15,753 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:15,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-02 21:02:15,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:15,958 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1301230960, now seen corresponding path program 1 times [2022-11-02 21:02:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:15,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700242369] [2022-11-02 21:02:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:15,963 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:15,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-02 21:02:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:17,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:17,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:17,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700242369] [2022-11-02 21:02:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700242369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:17,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:17,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27592998] [2022-11-02 21:02:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:17,465 INFO L87 Difference]: Start difference. First operand 655 states and 915 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:19,478 INFO L93 Difference]: Finished difference Result 3028 states and 4406 transitions. [2022-11-02 21:02:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:19,481 INFO L225 Difference]: With dead ends: 3028 [2022-11-02 21:02:19,481 INFO L226 Difference]: Without dead ends: 2483 [2022-11-02 21:02:19,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:19,482 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 5716 mSDsluCounter, 5420 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5716 SdHoareTripleChecker+Valid, 6172 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:19,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5716 Valid, 6172 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2022-11-02 21:02:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 657. [2022-11-02 21:02:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 643 states have (on average 1.401244167962675) internal successors, (901), 643 states have internal predecessors, (901), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 917 transitions. [2022-11-02 21:02:19,518 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 917 transitions. Word has length 438 [2022-11-02 21:02:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:19,518 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 917 transitions. [2022-11-02 21:02:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 917 transitions. [2022-11-02 21:02:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:19,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:19,522 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:19,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-02 21:02:19,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:19,734 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1417548398, now seen corresponding path program 1 times [2022-11-02 21:02:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:19,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011069154] [2022-11-02 21:02:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:19,739 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:19,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-02 21:02:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:21,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:21,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:21,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011069154] [2022-11-02 21:02:21,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011069154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:21,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:21,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623671572] [2022-11-02 21:02:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:21,253 INFO L87 Difference]: Start difference. First operand 657 states and 917 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:23,231 INFO L93 Difference]: Finished difference Result 3032 states and 4409 transitions. [2022-11-02 21:02:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:23,234 INFO L225 Difference]: With dead ends: 3032 [2022-11-02 21:02:23,234 INFO L226 Difference]: Without dead ends: 2485 [2022-11-02 21:02:23,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:23,235 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 5565 mSDsluCounter, 5491 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5565 SdHoareTripleChecker+Valid, 6247 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:23,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5565 Valid, 6247 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-11-02 21:02:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 659. [2022-11-02 21:02:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 645 states have (on average 1.4) internal successors, (903), 645 states have internal predecessors, (903), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 919 transitions. [2022-11-02 21:02:23,261 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 919 transitions. Word has length 438 [2022-11-02 21:02:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:23,261 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 919 transitions. [2022-11-02 21:02:23,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 919 transitions. [2022-11-02 21:02:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:23,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:23,264 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:23,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:23,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:23,464 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2061244140, now seen corresponding path program 1 times [2022-11-02 21:02:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736149402] [2022-11-02 21:02:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:23,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:23,467 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-02 21:02:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:24,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:24,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:24,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:24,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736149402] [2022-11-02 21:02:24,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736149402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:24,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:24,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8106022] [2022-11-02 21:02:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:24,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:24,948 INFO L87 Difference]: Start difference. First operand 659 states and 919 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:26,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:26,921 INFO L93 Difference]: Finished difference Result 3036 states and 4412 transitions. [2022-11-02 21:02:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:26,924 INFO L225 Difference]: With dead ends: 3036 [2022-11-02 21:02:26,924 INFO L226 Difference]: Without dead ends: 2487 [2022-11-02 21:02:26,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:26,927 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 5704 mSDsluCounter, 5437 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5704 SdHoareTripleChecker+Valid, 6197 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:26,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5704 Valid, 6197 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-11-02 21:02:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 661. [2022-11-02 21:02:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 647 states have (on average 1.3987635239567233) internal successors, (905), 647 states have internal predecessors, (905), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 921 transitions. [2022-11-02 21:02:26,957 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 921 transitions. Word has length 438 [2022-11-02 21:02:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:26,957 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 921 transitions. [2022-11-02 21:02:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 921 transitions. [2022-11-02 21:02:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:26,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:26,961 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:26,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:27,162 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:27,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2035098346, now seen corresponding path program 1 times [2022-11-02 21:02:27,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:27,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10067336] [2022-11-02 21:02:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:27,165 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:27,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-02 21:02:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:28,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:28,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:28,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:28,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10067336] [2022-11-02 21:02:28,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10067336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:28,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:28,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:28,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202685949] [2022-11-02 21:02:28,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:28,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:28,706 INFO L87 Difference]: Start difference. First operand 661 states and 921 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:30,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:30,726 INFO L93 Difference]: Finished difference Result 3042 states and 4418 transitions. [2022-11-02 21:02:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:30,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:30,729 INFO L225 Difference]: With dead ends: 3042 [2022-11-02 21:02:30,729 INFO L226 Difference]: Without dead ends: 2491 [2022-11-02 21:02:30,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:30,731 INFO L413 NwaCegarLoop]: 770 mSDtfsCounter, 5647 mSDsluCounter, 5437 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5647 SdHoareTripleChecker+Valid, 6207 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:30,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5647 Valid, 6207 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-11-02 21:02:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 665. [2022-11-02 21:02:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 651 states have (on average 1.3978494623655915) internal successors, (910), 651 states have internal predecessors, (910), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 926 transitions. [2022-11-02 21:02:30,756 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 926 transitions. Word has length 438 [2022-11-02 21:02:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:30,756 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 926 transitions. [2022-11-02 21:02:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 926 transitions. [2022-11-02 21:02:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:30,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:30,758 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:30,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-02 21:02:30,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:30,959 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash -766500328, now seen corresponding path program 1 times [2022-11-02 21:02:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202028216] [2022-11-02 21:02:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:30,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:30,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:30,963 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:30,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-02 21:02:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:32,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:32,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202028216] [2022-11-02 21:02:32,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202028216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:32,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:32,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:32,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111073454] [2022-11-02 21:02:32,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:32,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:32,508 INFO L87 Difference]: Start difference. First operand 665 states and 926 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:34,562 INFO L93 Difference]: Finished difference Result 3048 states and 4424 transitions. [2022-11-02 21:02:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:34,565 INFO L225 Difference]: With dead ends: 3048 [2022-11-02 21:02:34,565 INFO L226 Difference]: Without dead ends: 2493 [2022-11-02 21:02:34,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:34,566 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 5538 mSDsluCounter, 5547 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5538 SdHoareTripleChecker+Valid, 6321 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:34,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5538 Valid, 6321 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 21:02:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-11-02 21:02:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 667. [2022-11-02 21:02:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 653 states have (on average 1.3966309341500767) internal successors, (912), 653 states have internal predecessors, (912), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 928 transitions. [2022-11-02 21:02:34,606 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 928 transitions. Word has length 438 [2022-11-02 21:02:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:34,606 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 928 transitions. [2022-11-02 21:02:34,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 928 transitions. [2022-11-02 21:02:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:34,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:34,610 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:34,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:34,822 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 387891098, now seen corresponding path program 1 times [2022-11-02 21:02:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:34,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918292451] [2022-11-02 21:02:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:34,827 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:34,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-02 21:02:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:36,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:36,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:36,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918292451] [2022-11-02 21:02:36,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918292451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:36,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:36,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350860816] [2022-11-02 21:02:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:36,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:36,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:36,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:36,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:36,358 INFO L87 Difference]: Start difference. First operand 667 states and 928 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:38,312 INFO L93 Difference]: Finished difference Result 3052 states and 4427 transitions. [2022-11-02 21:02:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:38,315 INFO L225 Difference]: With dead ends: 3052 [2022-11-02 21:02:38,316 INFO L226 Difference]: Without dead ends: 2495 [2022-11-02 21:02:38,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:38,317 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 5577 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5577 SdHoareTripleChecker+Valid, 6277 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:38,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5577 Valid, 6277 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-11-02 21:02:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 669. [2022-11-02 21:02:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 655 states have (on average 1.3954198473282442) internal successors, (914), 655 states have internal predecessors, (914), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 930 transitions. [2022-11-02 21:02:38,370 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 930 transitions. Word has length 438 [2022-11-02 21:02:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:38,371 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 930 transitions. [2022-11-02 21:02:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 930 transitions. [2022-11-02 21:02:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:38,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:38,375 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:38,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:38,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:38,590 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1251661212, now seen corresponding path program 1 times [2022-11-02 21:02:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273618736] [2022-11-02 21:02:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:38,594 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:38,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-02 21:02:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:40,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:40,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:40,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273618736] [2022-11-02 21:02:40,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273618736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:40,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:40,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:40,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908190242] [2022-11-02 21:02:40,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:40,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:40,101 INFO L87 Difference]: Start difference. First operand 669 states and 930 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:42,074 INFO L93 Difference]: Finished difference Result 3056 states and 4430 transitions. [2022-11-02 21:02:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:42,076 INFO L225 Difference]: With dead ends: 3056 [2022-11-02 21:02:42,076 INFO L226 Difference]: Without dead ends: 2497 [2022-11-02 21:02:42,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:42,077 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 5576 mSDsluCounter, 5505 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5576 SdHoareTripleChecker+Valid, 6287 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:42,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5576 Valid, 6287 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-02 21:02:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 671. [2022-11-02 21:02:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 657 states have (on average 1.3942161339421613) internal successors, (916), 657 states have internal predecessors, (916), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 932 transitions. [2022-11-02 21:02:42,121 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 932 transitions. Word has length 438 [2022-11-02 21:02:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:42,121 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 932 transitions. [2022-11-02 21:02:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 932 transitions. [2022-11-02 21:02:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:42,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:42,125 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:42,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-02 21:02:42,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:42,338 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:42,338 INFO L85 PathProgramCache]: Analyzing trace with hash -758610914, now seen corresponding path program 1 times [2022-11-02 21:02:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:42,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264828096] [2022-11-02 21:02:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:42,341 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:42,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-02 21:02:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:43,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:43,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:43,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:43,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264828096] [2022-11-02 21:02:43,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264828096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:43,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:43,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:02:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725752693] [2022-11-02 21:02:43,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:43,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:43,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:43,891 INFO L87 Difference]: Start difference. First operand 671 states and 932 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:45,910 INFO L93 Difference]: Finished difference Result 3060 states and 4433 transitions. [2022-11-02 21:02:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:02:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:45,912 INFO L225 Difference]: With dead ends: 3060 [2022-11-02 21:02:45,912 INFO L226 Difference]: Without dead ends: 2499 [2022-11-02 21:02:45,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:02:45,913 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 5522 mSDsluCounter, 5571 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5522 SdHoareTripleChecker+Valid, 6357 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:45,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5522 Valid, 6357 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 21:02:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-11-02 21:02:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 673. [2022-11-02 21:02:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 659 states have (on average 1.393019726858877) internal successors, (918), 659 states have internal predecessors, (918), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 934 transitions. [2022-11-02 21:02:45,941 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 934 transitions. Word has length 438 [2022-11-02 21:02:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:45,941 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 934 transitions. [2022-11-02 21:02:45,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 934 transitions. [2022-11-02 21:02:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:45,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:45,944 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:45,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:46,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:46,145 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash 137620256, now seen corresponding path program 1 times [2022-11-02 21:02:46,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:46,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886219885] [2022-11-02 21:02:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:46,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:46,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:46,148 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:46,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-02 21:02:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:47,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:47,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:47,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886219885] [2022-11-02 21:02:47,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886219885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:47,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:47,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:02:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376537333] [2022-11-02 21:02:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:47,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:02:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:02:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:02:47,721 INFO L87 Difference]: Start difference. First operand 673 states and 934 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:50,099 INFO L93 Difference]: Finished difference Result 3198 states and 4635 transitions. [2022-11-02 21:02:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:02:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:50,102 INFO L225 Difference]: With dead ends: 3198 [2022-11-02 21:02:50,102 INFO L226 Difference]: Without dead ends: 2635 [2022-11-02 21:02:50,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:02:50,103 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 6503 mSDsluCounter, 7294 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6503 SdHoareTripleChecker+Valid, 8084 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:50,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6503 Valid, 8084 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:02:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-02 21:02:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 675. [2022-11-02 21:02:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 661 states have (on average 1.3918305597579426) internal successors, (920), 661 states have internal predecessors, (920), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 936 transitions. [2022-11-02 21:02:50,134 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 936 transitions. Word has length 438 [2022-11-02 21:02:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:50,134 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 936 transitions. [2022-11-02 21:02:50,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 936 transitions. [2022-11-02 21:02:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:50,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:50,138 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:50,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:50,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:50,338 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:50,339 INFO L85 PathProgramCache]: Analyzing trace with hash 938551970, now seen corresponding path program 1 times [2022-11-02 21:02:50,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:50,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538826996] [2022-11-02 21:02:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:50,342 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:50,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-02 21:02:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:51,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:51,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:51,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:51,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538826996] [2022-11-02 21:02:51,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538826996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:51,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:51,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:02:51,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639038446] [2022-11-02 21:02:51,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:51,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:02:51,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:02:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:02:51,905 INFO L87 Difference]: Start difference. First operand 675 states and 936 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:54,347 INFO L93 Difference]: Finished difference Result 3208 states and 4646 transitions. [2022-11-02 21:02:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:02:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:54,349 INFO L225 Difference]: With dead ends: 3208 [2022-11-02 21:02:54,349 INFO L226 Difference]: Without dead ends: 2643 [2022-11-02 21:02:54,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:02:54,350 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 6211 mSDsluCounter, 7517 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6211 SdHoareTripleChecker+Valid, 8311 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:54,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6211 Valid, 8311 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:02:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2022-11-02 21:02:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 677. [2022-11-02 21:02:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 663 states have (on average 1.3906485671191553) internal successors, (922), 663 states have internal predecessors, (922), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 938 transitions. [2022-11-02 21:02:54,397 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 938 transitions. Word has length 438 [2022-11-02 21:02:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:54,397 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 938 transitions. [2022-11-02 21:02:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 938 transitions. [2022-11-02 21:02:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:54,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:54,401 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:54,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-02 21:02:54,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:54,615 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 631005860, now seen corresponding path program 1 times [2022-11-02 21:02:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:54,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296412223] [2022-11-02 21:02:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:54,618 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:54,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-02 21:02:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:56,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:56,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:56,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296412223] [2022-11-02 21:02:56,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296412223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:56,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:56,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:02:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074346825] [2022-11-02 21:02:56,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:56,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:02:56,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:02:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:02:56,186 INFO L87 Difference]: Start difference. First operand 677 states and 938 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:58,599 INFO L93 Difference]: Finished difference Result 3218 states and 4657 transitions. [2022-11-02 21:02:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:02:58,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:02:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:58,602 INFO L225 Difference]: With dead ends: 3218 [2022-11-02 21:02:58,602 INFO L226 Difference]: Without dead ends: 2651 [2022-11-02 21:02:58,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:02:58,603 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 6187 mSDsluCounter, 7510 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6187 SdHoareTripleChecker+Valid, 8308 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:58,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6187 Valid, 8308 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:02:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-11-02 21:02:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 679. [2022-11-02 21:02:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 665 states have (on average 1.3894736842105264) internal successors, (924), 665 states have internal predecessors, (924), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 940 transitions. [2022-11-02 21:02:58,631 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 940 transitions. Word has length 438 [2022-11-02 21:02:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:58,632 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 940 transitions. [2022-11-02 21:02:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:02:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 940 transitions. [2022-11-02 21:02:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:02:58,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:58,634 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:58,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-02 21:02:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:58,835 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 223982374, now seen corresponding path program 1 times [2022-11-02 21:02:58,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:58,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906423826] [2022-11-02 21:02:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:58,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:58,838 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:58,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-02 21:02:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:00,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:00,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:00,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906423826] [2022-11-02 21:03:00,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906423826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:00,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:00,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:00,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750914565] [2022-11-02 21:03:00,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:00,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:00,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:00,416 INFO L87 Difference]: Start difference. First operand 679 states and 940 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:02,859 INFO L93 Difference]: Finished difference Result 3236 states and 4680 transitions. [2022-11-02 21:03:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:02,862 INFO L225 Difference]: With dead ends: 3236 [2022-11-02 21:03:02,862 INFO L226 Difference]: Without dead ends: 2667 [2022-11-02 21:03:02,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:02,863 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 6388 mSDsluCounter, 7498 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6388 SdHoareTripleChecker+Valid, 8306 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:02,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6388 Valid, 8306 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:03:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-11-02 21:03:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 683. [2022-11-02 21:03:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 669 states have (on average 1.3886397608370702) internal successors, (929), 669 states have internal predecessors, (929), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 945 transitions. [2022-11-02 21:03:02,895 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 945 transitions. Word has length 438 [2022-11-02 21:03:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:02,895 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 945 transitions. [2022-11-02 21:03:02,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 945 transitions. [2022-11-02 21:03:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:02,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:02,898 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:02,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-02 21:03:03,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:03,099 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1983408984, now seen corresponding path program 1 times [2022-11-02 21:03:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266674808] [2022-11-02 21:03:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:03,102 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:03,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-02 21:03:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:04,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:04,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:04,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:04,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266674808] [2022-11-02 21:03:04,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266674808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:04,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:04,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:04,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599422770] [2022-11-02 21:03:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:04,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:04,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:04,681 INFO L87 Difference]: Start difference. First operand 683 states and 945 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:07,029 INFO L93 Difference]: Finished difference Result 3248 states and 4694 transitions. [2022-11-02 21:03:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:07,032 INFO L225 Difference]: With dead ends: 3248 [2022-11-02 21:03:07,032 INFO L226 Difference]: Without dead ends: 2675 [2022-11-02 21:03:07,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:07,033 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 6639 mSDsluCounter, 7260 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6639 SdHoareTripleChecker+Valid, 8072 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:07,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6639 Valid, 8072 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:03:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-02 21:03:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 685. [2022-11-02 21:03:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 671 states have (on average 1.3874813710879286) internal successors, (931), 671 states have internal predecessors, (931), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 947 transitions. [2022-11-02 21:03:07,080 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 947 transitions. Word has length 438 [2022-11-02 21:03:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:07,080 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 947 transitions. [2022-11-02 21:03:07,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 947 transitions. [2022-11-02 21:03:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:07,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:07,084 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:07,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:07,302 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash 467922602, now seen corresponding path program 1 times [2022-11-02 21:03:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441565408] [2022-11-02 21:03:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:07,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:07,306 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:07,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-02 21:03:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:08,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:08,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:08,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:08,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441565408] [2022-11-02 21:03:08,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441565408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:08,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:08,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812867365] [2022-11-02 21:03:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:08,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:08,901 INFO L87 Difference]: Start difference. First operand 685 states and 947 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:11,363 INFO L93 Difference]: Finished difference Result 3258 states and 4705 transitions. [2022-11-02 21:03:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:11,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:11,366 INFO L225 Difference]: With dead ends: 3258 [2022-11-02 21:03:11,367 INFO L226 Difference]: Without dead ends: 2683 [2022-11-02 21:03:11,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:11,368 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 6120 mSDsluCounter, 7635 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6120 SdHoareTripleChecker+Valid, 8451 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:11,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6120 Valid, 8451 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:03:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-11-02 21:03:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 687. [2022-11-02 21:03:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 673 states have (on average 1.3863298662704309) internal successors, (933), 673 states have internal predecessors, (933), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 949 transitions. [2022-11-02 21:03:11,397 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 949 transitions. Word has length 438 [2022-11-02 21:03:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:11,397 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 949 transitions. [2022-11-02 21:03:11,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 949 transitions. [2022-11-02 21:03:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:11,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:11,400 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:11,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-02 21:03:11,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:11,600 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash -168632020, now seen corresponding path program 1 times [2022-11-02 21:03:11,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:11,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2301976] [2022-11-02 21:03:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:11,604 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:11,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-02 21:03:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:12,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:12,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:13,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:13,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:13,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2301976] [2022-11-02 21:03:13,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2301976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:13,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:13,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064481246] [2022-11-02 21:03:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:13,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:13,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:13,200 INFO L87 Difference]: Start difference. First operand 687 states and 949 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:15,632 INFO L93 Difference]: Finished difference Result 3268 states and 4716 transitions. [2022-11-02 21:03:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:15,635 INFO L225 Difference]: With dead ends: 3268 [2022-11-02 21:03:15,635 INFO L226 Difference]: Without dead ends: 2691 [2022-11-02 21:03:15,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:15,636 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 6252 mSDsluCounter, 7501 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6252 SdHoareTripleChecker+Valid, 8321 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:15,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6252 Valid, 8321 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:03:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-11-02 21:03:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 689. [2022-11-02 21:03:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 675 states have (on average 1.385185185185185) internal successors, (935), 675 states have internal predecessors, (935), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 951 transitions. [2022-11-02 21:03:15,666 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 951 transitions. Word has length 438 [2022-11-02 21:03:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:15,667 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 951 transitions. [2022-11-02 21:03:15,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 951 transitions. [2022-11-02 21:03:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:15,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:15,669 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:15,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-02 21:03:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:15,870 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1287687214, now seen corresponding path program 1 times [2022-11-02 21:03:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:15,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911868706] [2022-11-02 21:03:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:15,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:15,873 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:15,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-02 21:03:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:17,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:17,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911868706] [2022-11-02 21:03:17,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911868706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:17,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:17,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813878406] [2022-11-02 21:03:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:17,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:17,485 INFO L87 Difference]: Start difference. First operand 689 states and 951 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:19,917 INFO L93 Difference]: Finished difference Result 3278 states and 4727 transitions. [2022-11-02 21:03:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:19,919 INFO L225 Difference]: With dead ends: 3278 [2022-11-02 21:03:19,919 INFO L226 Difference]: Without dead ends: 2699 [2022-11-02 21:03:19,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:19,920 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 6413 mSDsluCounter, 7451 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6413 SdHoareTripleChecker+Valid, 8275 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:19,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6413 Valid, 8275 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:03:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-11-02 21:03:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 691. [2022-11-02 21:03:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 677 states have (on average 1.3840472673559823) internal successors, (937), 677 states have internal predecessors, (937), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 953 transitions. [2022-11-02 21:03:19,951 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 953 transitions. Word has length 438 [2022-11-02 21:03:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:19,951 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 953 transitions. [2022-11-02 21:03:19,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 953 transitions. [2022-11-02 21:03:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:19,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:19,955 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:19,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-02 21:03:20,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:20,156 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1503727536, now seen corresponding path program 1 times [2022-11-02 21:03:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:20,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132359562] [2022-11-02 21:03:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:20,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:20,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:20,159 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:20,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-02 21:03:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:21,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:21,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:21,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132359562] [2022-11-02 21:03:21,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132359562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:21,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:21,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:21,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873626634] [2022-11-02 21:03:21,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:21,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:21,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:21,809 INFO L87 Difference]: Start difference. First operand 691 states and 953 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:24,230 INFO L93 Difference]: Finished difference Result 3288 states and 4738 transitions. [2022-11-02 21:03:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:24,232 INFO L225 Difference]: With dead ends: 3288 [2022-11-02 21:03:24,232 INFO L226 Difference]: Without dead ends: 2707 [2022-11-02 21:03:24,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:24,233 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 6536 mSDsluCounter, 7331 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6536 SdHoareTripleChecker+Valid, 8159 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:24,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6536 Valid, 8159 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:03:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2022-11-02 21:03:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 693. [2022-11-02 21:03:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 679 states have (on average 1.3829160530191458) internal successors, (939), 679 states have internal predecessors, (939), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 955 transitions. [2022-11-02 21:03:24,265 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 955 transitions. Word has length 438 [2022-11-02 21:03:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:24,265 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 955 transitions. [2022-11-02 21:03:24,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 955 transitions. [2022-11-02 21:03:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:24,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:24,268 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:24,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:24,469 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:24,469 INFO L85 PathProgramCache]: Analyzing trace with hash -596603982, now seen corresponding path program 1 times [2022-11-02 21:03:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:24,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510168327] [2022-11-02 21:03:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:24,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:24,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:24,472 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:24,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-02 21:03:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:25,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:25,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:26,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:26,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:26,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510168327] [2022-11-02 21:03:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510168327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:26,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:26,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187545239] [2022-11-02 21:03:26,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:26,142 INFO L87 Difference]: Start difference. First operand 693 states and 955 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:28,608 INFO L93 Difference]: Finished difference Result 3306 states and 4761 transitions. [2022-11-02 21:03:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:28,611 INFO L225 Difference]: With dead ends: 3306 [2022-11-02 21:03:28,611 INFO L226 Difference]: Without dead ends: 2723 [2022-11-02 21:03:28,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:28,612 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 6646 mSDsluCounter, 7291 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6646 SdHoareTripleChecker+Valid, 8129 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:28,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6646 Valid, 8129 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:03:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2022-11-02 21:03:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 697. [2022-11-02 21:03:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 683 states have (on average 1.3821376281112738) internal successors, (944), 683 states have internal predecessors, (944), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 960 transitions. [2022-11-02 21:03:28,645 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 960 transitions. Word has length 438 [2022-11-02 21:03:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:28,645 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 960 transitions. [2022-11-02 21:03:28,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 960 transitions. [2022-11-02 21:03:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:28,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:28,649 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:28,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:28,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:28,870 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash 785537204, now seen corresponding path program 1 times [2022-11-02 21:03:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254533999] [2022-11-02 21:03:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:28,874 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:28,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-02 21:03:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:30,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:30,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254533999] [2022-11-02 21:03:30,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254533999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:30,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:30,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950413806] [2022-11-02 21:03:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:30,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:30,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:30,511 INFO L87 Difference]: Start difference. First operand 697 states and 960 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:33,078 INFO L93 Difference]: Finished difference Result 3318 states and 4775 transitions. [2022-11-02 21:03:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:33,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:33,082 INFO L225 Difference]: With dead ends: 3318 [2022-11-02 21:03:33,082 INFO L226 Difference]: Without dead ends: 2731 [2022-11-02 21:03:33,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:33,083 INFO L413 NwaCegarLoop]: 842 mSDtfsCounter, 6069 mSDsluCounter, 7772 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6069 SdHoareTripleChecker+Valid, 8614 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:33,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6069 Valid, 8614 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-02 21:03:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2022-11-02 21:03:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 699. [2022-11-02 21:03:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 685 states have (on average 1.381021897810219) internal successors, (946), 685 states have internal predecessors, (946), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 962 transitions. [2022-11-02 21:03:33,118 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 962 transitions. Word has length 438 [2022-11-02 21:03:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:33,118 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 962 transitions. [2022-11-02 21:03:33,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 962 transitions. [2022-11-02 21:03:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:33,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:33,121 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:33,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-02 21:03:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:33,321 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -236487114, now seen corresponding path program 1 times [2022-11-02 21:03:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:33,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301594157] [2022-11-02 21:03:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:33,325 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:33,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-02 21:03:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:34,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:34,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:34,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301594157] [2022-11-02 21:03:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301594157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:34,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322682469] [2022-11-02 21:03:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:34,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:34,983 INFO L87 Difference]: Start difference. First operand 699 states and 962 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:37,538 INFO L93 Difference]: Finished difference Result 3328 states and 4786 transitions. [2022-11-02 21:03:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:37,541 INFO L225 Difference]: With dead ends: 3328 [2022-11-02 21:03:37,541 INFO L226 Difference]: Without dead ends: 2739 [2022-11-02 21:03:37,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:37,542 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 6737 mSDsluCounter, 7241 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6737 SdHoareTripleChecker+Valid, 8087 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:37,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6737 Valid, 8087 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:03:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-11-02 21:03:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 701. [2022-11-02 21:03:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 687 states have (on average 1.3799126637554586) internal successors, (948), 687 states have internal predecessors, (948), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 964 transitions. [2022-11-02 21:03:37,593 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 964 transitions. Word has length 438 [2022-11-02 21:03:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:37,594 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 964 transitions. [2022-11-02 21:03:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 964 transitions. [2022-11-02 21:03:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:37,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:37,597 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:37,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-02 21:03:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:37,810 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 330046520, now seen corresponding path program 1 times [2022-11-02 21:03:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:37,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108540286] [2022-11-02 21:03:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:37,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:37,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:37,815 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:37,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-02 21:03:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:39,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:39,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:39,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108540286] [2022-11-02 21:03:39,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108540286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:39,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:39,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45782821] [2022-11-02 21:03:39,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:39,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:39,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:39,494 INFO L87 Difference]: Start difference. First operand 701 states and 964 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:41,983 INFO L93 Difference]: Finished difference Result 3338 states and 4797 transitions. [2022-11-02 21:03:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:41,986 INFO L225 Difference]: With dead ends: 3338 [2022-11-02 21:03:41,987 INFO L226 Difference]: Without dead ends: 2747 [2022-11-02 21:03:41,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:41,988 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 6160 mSDsluCounter, 7639 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6160 SdHoareTripleChecker+Valid, 8489 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:41,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6160 Valid, 8489 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:03:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2022-11-02 21:03:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 703. [2022-11-02 21:03:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 689 states have (on average 1.3788098693759072) internal successors, (950), 689 states have internal predecessors, (950), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 966 transitions. [2022-11-02 21:03:42,039 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 966 transitions. Word has length 438 [2022-11-02 21:03:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:42,039 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 966 transitions. [2022-11-02 21:03:42,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 966 transitions. [2022-11-02 21:03:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:42,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:42,042 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:42,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:42,243 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash 312758970, now seen corresponding path program 1 times [2022-11-02 21:03:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749339705] [2022-11-02 21:03:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:42,246 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:42,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-02 21:03:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:43,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:43,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:43,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:43,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749339705] [2022-11-02 21:03:43,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749339705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:43,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:43,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:03:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013530946] [2022-11-02 21:03:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:43,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:03:43,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:03:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:03:43,874 INFO L87 Difference]: Start difference. First operand 703 states and 966 transitions. Second operand has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:45,958 INFO L93 Difference]: Finished difference Result 3124 states and 4487 transitions. [2022-11-02 21:03:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:03:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:45,961 INFO L225 Difference]: With dead ends: 3124 [2022-11-02 21:03:45,961 INFO L226 Difference]: Without dead ends: 2531 [2022-11-02 21:03:45,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:03:45,962 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 5433 mSDsluCounter, 5672 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5433 SdHoareTripleChecker+Valid, 6526 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:45,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5433 Valid, 6526 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 21:03:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2022-11-02 21:03:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 705. [2022-11-02 21:03:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 691 states have (on average 1.377713458755427) internal successors, (952), 691 states have internal predecessors, (952), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 968 transitions. [2022-11-02 21:03:45,994 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 968 transitions. Word has length 438 [2022-11-02 21:03:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:45,994 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 968 transitions. [2022-11-02 21:03:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 46.666666666666664) internal successors, (420), 9 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 968 transitions. [2022-11-02 21:03:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:45,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:45,997 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:46,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-02 21:03:46,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:46,197 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:46,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2145141180, now seen corresponding path program 1 times [2022-11-02 21:03:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:46,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071213087] [2022-11-02 21:03:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:46,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:46,201 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:46,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-02 21:03:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:47,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:47,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:47,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071213087] [2022-11-02 21:03:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071213087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:47,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914183065] [2022-11-02 21:03:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:47,839 INFO L87 Difference]: Start difference. First operand 705 states and 968 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:50,300 INFO L93 Difference]: Finished difference Result 3262 states and 4689 transitions. [2022-11-02 21:03:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:50,302 INFO L225 Difference]: With dead ends: 3262 [2022-11-02 21:03:50,302 INFO L226 Difference]: Without dead ends: 2667 [2022-11-02 21:03:50,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:50,304 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 6100 mSDsluCounter, 7578 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6100 SdHoareTripleChecker+Valid, 8436 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:50,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6100 Valid, 8436 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:03:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-11-02 21:03:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 707. [2022-11-02 21:03:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 693 states have (on average 1.3766233766233766) internal successors, (954), 693 states have internal predecessors, (954), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 970 transitions. [2022-11-02 21:03:50,336 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 970 transitions. Word has length 438 [2022-11-02 21:03:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:50,337 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 970 transitions. [2022-11-02 21:03:50,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 970 transitions. [2022-11-02 21:03:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:50,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:50,340 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:50,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-02 21:03:50,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:50,541 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 15206718, now seen corresponding path program 1 times [2022-11-02 21:03:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:50,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502724289] [2022-11-02 21:03:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:50,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:50,544 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-02 21:03:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:52,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:52,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502724289] [2022-11-02 21:03:52,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502724289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:52,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:52,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663849049] [2022-11-02 21:03:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:52,190 INFO L87 Difference]: Start difference. First operand 707 states and 970 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:54,611 INFO L93 Difference]: Finished difference Result 3272 states and 4700 transitions. [2022-11-02 21:03:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 438 [2022-11-02 21:03:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:54,615 INFO L225 Difference]: With dead ends: 3272 [2022-11-02 21:03:54,615 INFO L226 Difference]: Without dead ends: 2675 [2022-11-02 21:03:54,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:03:54,617 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 6209 mSDsluCounter, 7469 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6209 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:54,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6209 Valid, 8331 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 21:03:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-02 21:03:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 709. [2022-11-02 21:03:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 695 states have (on average 1.3755395683453238) internal successors, (956), 695 states have internal predecessors, (956), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:03:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 972 transitions. [2022-11-02 21:03:54,669 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 972 transitions. Word has length 438 [2022-11-02 21:03:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:54,669 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 972 transitions. [2022-11-02 21:03:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:03:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 972 transitions. [2022-11-02 21:03:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-02 21:03:54,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:54,673 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:54,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-02 21:03:54,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:54,894 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash -773600960, now seen corresponding path program 1 times [2022-11-02 21:03:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:54,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289597111] [2022-11-02 21:03:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:54,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:54,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:54,897 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:54,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae11a7c2-bf07-4147-8311-cca079c22229/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-02 21:03:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:56,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:03:56,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:56,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289597111] [2022-11-02 21:03:56,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289597111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:56,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:56,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:03:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078643984] [2022-11-02 21:03:56,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:56,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:56,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:56,634 INFO L87 Difference]: Start difference. First operand 709 states and 972 transitions. Second operand has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)