./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i --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_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- 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 [2022-11-03 02:24:37,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:24:37,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:24:37,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:24:37,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:24:37,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:24:37,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:24:37,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:24:37,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:24:37,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:24:37,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:24:37,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:24:37,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:24:37,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:24:37,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:24:37,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:24:37,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:24:37,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:24:37,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:24:37,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:24:37,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:24:37,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:24:37,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:24:37,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:24:37,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:24:37,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:24:37,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:24:37,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:24:37,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:24:37,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:24:37,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:24:37,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:24:37,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:24:37,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:24:37,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:24:37,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:24:37,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:24:37,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:24:37,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:24:37,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:24:37,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:24:37,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:24:38,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:24:38,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:24:38,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:24:38,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:24:38,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:24:38,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:24:38,047 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:24:38,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:24:38,048 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:24:38,048 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:24:38,049 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:24:38,050 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:24:38,050 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:24:38,050 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:24:38,050 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:24:38,051 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:24:38,051 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:24:38,051 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:24:38,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:24:38,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:24:38,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:24:38,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:24:38,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:24:38,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:24:38,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:24:38,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:24:38,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:24:38,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:24:38,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:24:38,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:24:38,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:24:38,064 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:24:38,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:24:38,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:24:38,065 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:24:38,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:24:38,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:24:38,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:24:38,066 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2022-11-03 02:24:38,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:24:38,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:24:38,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:24:38,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:24:38,451 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:24:38,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-03 02:24:38,540 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/4cfa1cb79/57eb679aaa83415c9d6de8d0b602610d/FLAG493081543 [2022-11-03 02:24:39,363 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:24:39,367 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-03 02:24:39,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/4cfa1cb79/57eb679aaa83415c9d6de8d0b602610d/FLAG493081543 [2022-11-03 02:24:39,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/4cfa1cb79/57eb679aaa83415c9d6de8d0b602610d [2022-11-03 02:24:39,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:24:39,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:24:39,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:24:39,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:24:39,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:24:39,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:39" (1/1) ... [2022-11-03 02:24:39,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc0f9c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:39, skipping insertion in model container [2022-11-03 02:24:39,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:39" (1/1) ... [2022-11-03 02:24:39,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:24:40,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:24:41,911 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-03 02:24:42,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:24:42,143 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:24:42,556 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-03 02:24:42,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:24:42,680 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:24:42,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42 WrapperNode [2022-11-03 02:24:42,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:24:42,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:24:42,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:24:42,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:24:42,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,974 INFO L138 Inliner]: procedures = 221, calls = 1591, calls flagged for inlining = 84, calls inlined = 76, statements flattened = 4430 [2022-11-03 02:24:42,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:24:42,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:24:42,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:24:42,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:24:42,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:42,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:24:43,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:24:43,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:24:43,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:24:43,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (1/1) ... [2022-11-03 02:24:43,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:24:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:43,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:24:43,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:24:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_get_mode [2022-11-03 02:24:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_get_mode [2022-11-03 02:24:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2022-11-03 02:24:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2022-11-03 02:24:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:24:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:24:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:24:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:24:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-03 02:24:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-03 02:24:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_format [2022-11-03 02:24:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_format [2022-11-03 02:24:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:24:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:24:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure raid_io_hints [2022-11-03 02:24:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_io_hints [2022-11-03 02:24:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure raid_message [2022-11-03 02:24:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_message [2022-11-03 02:24:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:24:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:24:43,321 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:24:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:24:43,321 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_copies [2022-11-03 02:24:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_copies [2022-11-03 02:24:43,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:24:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:24:43,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:24:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:24:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure context_free [2022-11-03 02:24:43,322 INFO L138 BoogieDeclarations]: Found implementation of procedure context_free [2022-11-03 02:24:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:24:43,322 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:24:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-03 02:24:43,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-03 02:24:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure super_validate [2022-11-03 02:24:43,323 INFO L138 BoogieDeclarations]: Found implementation of procedure super_validate [2022-11-03 02:24:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure do_table_event [2022-11-03 02:24:43,323 INFO L138 BoogieDeclarations]: Found implementation of procedure do_table_event [2022-11-03 02:24:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:24:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:24:43,324 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:24:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:24:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure sync_page_io [2022-11-03 02:24:43,324 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_page_io [2022-11-03 02:24:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:24:43,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:24:43,325 INFO L130 BoogieDeclarations]: Found specification of procedure to_sector [2022-11-03 02:24:43,325 INFO L138 BoogieDeclarations]: Found implementation of procedure to_sector [2022-11-03 02:24:43,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:24:43,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:24:43,327 INFO L130 BoogieDeclarations]: Found specification of procedure raid_iterate_devices [2022-11-03 02:24:43,327 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_iterate_devices [2022-11-03 02:24:43,328 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2022-11-03 02:24:43,328 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2022-11-03 02:24:43,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2022-11-03 02:24:43,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2022-11-03 02:24:43,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:24:43,329 INFO L130 BoogieDeclarations]: Found specification of procedure mddev_suspend [2022-11-03 02:24:43,329 INFO L138 BoogieDeclarations]: Found implementation of procedure mddev_suspend [2022-11-03 02:24:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:24:43,330 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:24:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure super_sync [2022-11-03 02:24:43,330 INFO L138 BoogieDeclarations]: Found implementation of procedure super_sync [2022-11-03 02:24:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:24:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_power_of_2 [2022-11-03 02:24:43,330 INFO L138 BoogieDeclarations]: Found implementation of procedure is_power_of_2 [2022-11-03 02:24:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2022-11-03 02:24:43,331 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2022-11-03 02:24:43,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:24:43,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:24:43,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:24:43,331 INFO L130 BoogieDeclarations]: Found specification of procedure raid_merge [2022-11-03 02:24:43,332 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_merge [2022-11-03 02:24:43,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:24:43,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:24:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure raid_map [2022-11-03 02:24:43,333 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_map [2022-11-03 02:24:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:24:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:24:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-11-03 02:24:43,333 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2022-11-03 02:24:43,334 INFO L130 BoogieDeclarations]: Found specification of procedure md_stop [2022-11-03 02:24:43,334 INFO L138 BoogieDeclarations]: Found implementation of procedure md_stop [2022-11-03 02:24:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure raid_status [2022-11-03 02:24:43,335 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_status [2022-11-03 02:24:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2022-11-03 02:24:43,335 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2022-11-03 02:24:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:24:43,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:24:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:24:43,336 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:24:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:24:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure raid_dtr [2022-11-03 02:24:43,338 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_dtr [2022-11-03 02:24:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2022-11-03 02:24:43,338 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2022-11-03 02:24:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:24:43,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:24:43,339 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 02:24:43,339 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 02:24:44,000 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:24:44,003 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:24:44,507 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:24:48,528 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:24:49,773 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:24:49,773 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:24:49,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:49 BoogieIcfgContainer [2022-11-03 02:24:49,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:24:49,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:24:49,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:24:49,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:24:49,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:24:39" (1/3) ... [2022-11-03 02:24:49,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bc9fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:49, skipping insertion in model container [2022-11-03 02:24:49,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:42" (2/3) ... [2022-11-03 02:24:49,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bc9fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:49, skipping insertion in model container [2022-11-03 02:24:49,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:49" (3/3) ... [2022-11-03 02:24:49,796 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-03 02:24:49,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:24:49,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:24:49,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:24:49,932 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=FINITE_AUTOMATA, 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;@23d7d40e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:24:49,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:24:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 874 states, 613 states have (on average 1.468189233278956) internal successors, (900), 634 states have internal predecessors, (900), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-03 02:24:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-03 02:24:50,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:50,033 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:50,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash -861204368, now seen corresponding path program 1 times [2022-11-03 02:24:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083786896] [2022-11-03 02:24:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:50,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-03 02:24:51,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:51,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083786896] [2022-11-03 02:24:51,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083786896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:51,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:24:51,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:24:51,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041453839] [2022-11-03 02:24:51,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:51,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:24:51,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:24:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:24:51,332 INFO L87 Difference]: Start difference. First operand has 874 states, 613 states have (on average 1.468189233278956) internal successors, (900), 634 states have internal predecessors, (900), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:24:53,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:24:59,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:24:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:59,317 INFO L93 Difference]: Finished difference Result 2528 states and 3855 transitions. [2022-11-03 02:24:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:24:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 170 [2022-11-03 02:24:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:59,361 INFO L225 Difference]: With dead ends: 2528 [2022-11-03 02:24:59,362 INFO L226 Difference]: Without dead ends: 1675 [2022-11-03 02:24:59,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:24:59,379 INFO L413 NwaCegarLoop]: 1378 mSDtfsCounter, 1237 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:59,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 2560 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 02:24:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-11-03 02:24:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1672. [2022-11-03 02:24:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1190 states have (on average 1.464705882352941) internal successors, (1743), 1216 states have internal predecessors, (1743), 400 states have call successors, (400), 82 states have call predecessors, (400), 81 states have return successors, (395), 387 states have call predecessors, (395), 395 states have call successors, (395) [2022-11-03 02:24:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2538 transitions. [2022-11-03 02:24:59,569 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2538 transitions. Word has length 170 [2022-11-03 02:24:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:59,573 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 2538 transitions. [2022-11-03 02:24:59,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:24:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2538 transitions. [2022-11-03 02:24:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 02:24:59,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:59,590 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:59,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:24:59,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash 4786961, now seen corresponding path program 1 times [2022-11-03 02:24:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625726825] [2022-11-03 02:24:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-03 02:25:00,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:00,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625726825] [2022-11-03 02:25:00,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625726825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:00,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:00,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:00,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874638125] [2022-11-03 02:25:00,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:00,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:00,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:00,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:00,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:00,011 INFO L87 Difference]: Start difference. First operand 1672 states and 2538 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:04,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:25:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:04,602 INFO L93 Difference]: Finished difference Result 1674 states and 2539 transitions. [2022-11-03 02:25:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 173 [2022-11-03 02:25:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:04,615 INFO L225 Difference]: With dead ends: 1674 [2022-11-03 02:25:04,615 INFO L226 Difference]: Without dead ends: 1671 [2022-11-03 02:25:04,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:04,618 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 1266 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:04,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 1174 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:25:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-11-03 02:25:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1671. [2022-11-03 02:25:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1190 states have (on average 1.4638655462184873) internal successors, (1742), 1215 states have internal predecessors, (1742), 399 states have call successors, (399), 82 states have call predecessors, (399), 81 states have return successors, (395), 387 states have call predecessors, (395), 395 states have call successors, (395) [2022-11-03 02:25:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2536 transitions. [2022-11-03 02:25:04,718 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2536 transitions. Word has length 173 [2022-11-03 02:25:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:04,719 INFO L495 AbstractCegarLoop]: Abstraction has 1671 states and 2536 transitions. [2022-11-03 02:25:04,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2536 transitions. [2022-11-03 02:25:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:25:04,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:04,723 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:04,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:25:04,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 148093262, now seen corresponding path program 1 times [2022-11-03 02:25:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400961970] [2022-11-03 02:25:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-03 02:25:05,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:05,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400961970] [2022-11-03 02:25:05,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400961970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:05,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:05,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794464494] [2022-11-03 02:25:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:05,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:05,127 INFO L87 Difference]: Start difference. First operand 1671 states and 2536 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:08,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:25:11,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:11,964 INFO L93 Difference]: Finished difference Result 3291 states and 4996 transitions. [2022-11-03 02:25:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 174 [2022-11-03 02:25:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:11,988 INFO L225 Difference]: With dead ends: 3291 [2022-11-03 02:25:11,988 INFO L226 Difference]: Without dead ends: 3288 [2022-11-03 02:25:11,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:11,992 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 1251 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:11,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 2487 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 02:25:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-11-03 02:25:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3285. [2022-11-03 02:25:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 2347 states have (on average 1.4669791222837665) internal successors, (3443), 2394 states have internal predecessors, (3443), 776 states have call successors, (776), 162 states have call predecessors, (776), 161 states have return successors, (772), 756 states have call predecessors, (772), 772 states have call successors, (772) [2022-11-03 02:25:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 4991 transitions. [2022-11-03 02:25:12,206 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 4991 transitions. Word has length 174 [2022-11-03 02:25:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:12,208 INFO L495 AbstractCegarLoop]: Abstraction has 3285 states and 4991 transitions. [2022-11-03 02:25:12,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 4991 transitions. [2022-11-03 02:25:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-03 02:25:12,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:12,214 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:25:12,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 295626164, now seen corresponding path program 1 times [2022-11-03 02:25:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20495922] [2022-11-03 02:25:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-03 02:25:12,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20495922] [2022-11-03 02:25:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20495922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:12,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:12,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372167863] [2022-11-03 02:25:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:12,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:12,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:12,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:12,617 INFO L87 Difference]: Start difference. First operand 3285 states and 4991 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:14,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:16,873 INFO L93 Difference]: Finished difference Result 3287 states and 4992 transitions. [2022-11-03 02:25:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2022-11-03 02:25:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:16,897 INFO L225 Difference]: With dead ends: 3287 [2022-11-03 02:25:16,898 INFO L226 Difference]: Without dead ends: 3284 [2022-11-03 02:25:16,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:16,902 INFO L413 NwaCegarLoop]: 1172 mSDtfsCounter, 1262 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:16,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 1172 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:25:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2022-11-03 02:25:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3284. [2022-11-03 02:25:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2347 states have (on average 1.4665530464422667) internal successors, (3442), 2393 states have internal predecessors, (3442), 775 states have call successors, (775), 162 states have call predecessors, (775), 161 states have return successors, (772), 756 states have call predecessors, (772), 772 states have call successors, (772) [2022-11-03 02:25:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4989 transitions. [2022-11-03 02:25:17,124 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4989 transitions. Word has length 175 [2022-11-03 02:25:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:17,125 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 4989 transitions. [2022-11-03 02:25:17,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4989 transitions. [2022-11-03 02:25:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 02:25:17,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:17,129 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:25:17,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash 574183697, now seen corresponding path program 1 times [2022-11-03 02:25:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248900989] [2022-11-03 02:25:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:17,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-03 02:25:17,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:17,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248900989] [2022-11-03 02:25:17,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248900989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:17,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:17,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:17,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194611729] [2022-11-03 02:25:17,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:17,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:17,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:17,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:17,578 INFO L87 Difference]: Start difference. First operand 3284 states and 4989 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:21,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:23,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:25:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:23,910 INFO L93 Difference]: Finished difference Result 4882 states and 7421 transitions. [2022-11-03 02:25:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 176 [2022-11-03 02:25:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:23,938 INFO L225 Difference]: With dead ends: 4882 [2022-11-03 02:25:23,938 INFO L226 Difference]: Without dead ends: 4873 [2022-11-03 02:25:23,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:23,943 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 1227 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:23,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 2486 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 02:25:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2022-11-03 02:25:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4873. [2022-11-03 02:25:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 3489 states have (on average 1.4671825738033821) internal successors, (5119), 3555 states have internal predecessors, (5119), 1146 states have call successors, (1146), 240 states have call predecessors, (1146), 237 states have return successors, (1143), 1117 states have call predecessors, (1143), 1143 states have call successors, (1143) [2022-11-03 02:25:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7408 transitions. [2022-11-03 02:25:24,263 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7408 transitions. Word has length 176 [2022-11-03 02:25:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:24,263 INFO L495 AbstractCegarLoop]: Abstraction has 4873 states and 7408 transitions. [2022-11-03 02:25:24,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:25:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7408 transitions. [2022-11-03 02:25:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-03 02:25:24,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:24,275 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:24,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:25:24,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:24,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1813531555, now seen corresponding path program 1 times [2022-11-03 02:25:24,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:24,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227263189] [2022-11-03 02:25:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:24,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:24,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227263189] [2022-11-03 02:25:24,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:25:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267250283] [2022-11-03 02:25:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:24,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:24,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:24,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:24,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:25:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 3553 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-11-03 02:25:25,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:25,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267250283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:25,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:25,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:25,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31026416] [2022-11-03 02:25:25,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:25,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:25,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:25,754 INFO L87 Difference]: Start difference. First operand 4873 states and 7408 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:25:27,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:30,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:33,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:25:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:33,303 INFO L93 Difference]: Finished difference Result 10245 states and 15709 transitions. [2022-11-03 02:25:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:33,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 250 [2022-11-03 02:25:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:33,337 INFO L225 Difference]: With dead ends: 10245 [2022-11-03 02:25:33,337 INFO L226 Difference]: Without dead ends: 5407 [2022-11-03 02:25:33,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:33,359 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 123 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:33,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2215 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-03 02:25:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2022-11-03 02:25:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5395. [2022-11-03 02:25:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5395 states, 3981 states have (on average 1.4534036674202462) internal successors, (5786), 4047 states have internal predecessors, (5786), 1170 states have call successors, (1170), 246 states have call predecessors, (1170), 243 states have return successors, (1167), 1141 states have call predecessors, (1167), 1167 states have call successors, (1167) [2022-11-03 02:25:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 8123 transitions. [2022-11-03 02:25:33,699 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 8123 transitions. Word has length 250 [2022-11-03 02:25:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:33,700 INFO L495 AbstractCegarLoop]: Abstraction has 5395 states and 8123 transitions. [2022-11-03 02:25:33,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:25:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 8123 transitions. [2022-11-03 02:25:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-03 02:25:33,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:33,715 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-03 02:25:33,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:33,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:33,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2138919815, now seen corresponding path program 1 times [2022-11-03 02:25:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:33,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289677098] [2022-11-03 02:25:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:34,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:34,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550270007] [2022-11-03 02:25:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:34,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:34,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:34,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:34,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:25:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 3667 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:25:35,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:25:35,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:35,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289677098] [2022-11-03 02:25:35,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:35,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550270007] [2022-11-03 02:25:35,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550270007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:35,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:35,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:25:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46689824] [2022-11-03 02:25:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:35,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:25:35,486 INFO L87 Difference]: Start difference. First operand 5395 states and 8123 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:25:37,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:39,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:44,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:25:47,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:47,237 INFO L93 Difference]: Finished difference Result 15317 states and 23387 transitions. [2022-11-03 02:25:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:25:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 271 [2022-11-03 02:25:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:47,322 INFO L225 Difference]: With dead ends: 15317 [2022-11-03 02:25:47,322 INFO L226 Difference]: Without dead ends: 9957 [2022-11-03 02:25:47,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:25:47,343 INFO L413 NwaCegarLoop]: 1663 mSDtfsCounter, 881 mSDsluCounter, 3267 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 124 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 4644 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:47,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 4644 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 460 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2022-11-03 02:25:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2022-11-03 02:25:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 5407. [2022-11-03 02:25:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 3993 states have (on average 1.4520410718757826) internal successors, (5798), 4059 states have internal predecessors, (5798), 1170 states have call successors, (1170), 246 states have call predecessors, (1170), 243 states have return successors, (1167), 1141 states have call predecessors, (1167), 1167 states have call successors, (1167) [2022-11-03 02:25:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 8135 transitions. [2022-11-03 02:25:47,818 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 8135 transitions. Word has length 271 [2022-11-03 02:25:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:47,820 INFO L495 AbstractCegarLoop]: Abstraction has 5407 states and 8135 transitions. [2022-11-03 02:25:47,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:25:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 8135 transitions. [2022-11-03 02:25:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-03 02:25:47,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:47,833 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-03 02:25:47,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:25:48,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:48,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1389505489, now seen corresponding path program 1 times [2022-11-03 02:25:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590233253] [2022-11-03 02:25:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:48,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:48,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683962445] [2022-11-03 02:25:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:48,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:48,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:48,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:48,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:25:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 3823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:25:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:25:49,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:49,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590233253] [2022-11-03 02:25:49,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683962445] [2022-11-03 02:25:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683962445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:49,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:49,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:25:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161428607] [2022-11-03 02:25:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:49,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:25:49,471 INFO L87 Difference]: Start difference. First operand 5407 states and 8135 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:25:51,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:53,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:55,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:25:58,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:26:01,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:01,353 INFO L93 Difference]: Finished difference Result 14867 states and 22724 transitions. [2022-11-03 02:26:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:01,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 284 [2022-11-03 02:26:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:01,396 INFO L225 Difference]: With dead ends: 14867 [2022-11-03 02:26:01,396 INFO L226 Difference]: Without dead ends: 9495 [2022-11-03 02:26:01,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:01,421 INFO L413 NwaCegarLoop]: 1697 mSDtfsCounter, 859 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 115 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 4578 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:01,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 4578 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 445 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2022-11-03 02:26:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9495 states. [2022-11-03 02:26:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9495 to 5419. [2022-11-03 02:26:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 4005 states have (on average 1.4506866416978776) internal successors, (5810), 4071 states have internal predecessors, (5810), 1170 states have call successors, (1170), 246 states have call predecessors, (1170), 243 states have return successors, (1167), 1141 states have call predecessors, (1167), 1167 states have call successors, (1167) [2022-11-03 02:26:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 8147 transitions. [2022-11-03 02:26:01,915 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 8147 transitions. Word has length 284 [2022-11-03 02:26:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:01,916 INFO L495 AbstractCegarLoop]: Abstraction has 5419 states and 8147 transitions. [2022-11-03 02:26:01,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 8147 transitions. [2022-11-03 02:26:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-03 02:26:01,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:01,930 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-03 02:26:01,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:02,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:02,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash -338892400, now seen corresponding path program 1 times [2022-11-03 02:26:02,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:02,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193287154] [2022-11-03 02:26:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:02,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:02,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:26:02,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034813885] [2022-11-03 02:26:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:02,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:02,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:02,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:26:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 3818 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:26:03,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:03,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193287154] [2022-11-03 02:26:03,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:26:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034813885] [2022-11-03 02:26:03,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034813885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:03,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:03,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142059126] [2022-11-03 02:26:03,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:03,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:03,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:03,692 INFO L87 Difference]: Start difference. First operand 5419 states and 8147 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:05,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:07,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:09,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:15,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:26:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:16,983 INFO L93 Difference]: Finished difference Result 16013 states and 24515 transitions. [2022-11-03 02:26:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 284 [2022-11-03 02:26:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:17,022 INFO L225 Difference]: With dead ends: 16013 [2022-11-03 02:26:17,022 INFO L226 Difference]: Without dead ends: 10629 [2022-11-03 02:26:17,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:17,040 INFO L413 NwaCegarLoop]: 1824 mSDtfsCounter, 1009 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 103 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 5004 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:17,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 5004 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 501 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2022-11-03 02:26:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10629 states. [2022-11-03 02:26:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10629 to 5431. [2022-11-03 02:26:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 4017 states have (on average 1.4493403037092358) internal successors, (5822), 4083 states have internal predecessors, (5822), 1170 states have call successors, (1170), 246 states have call predecessors, (1170), 243 states have return successors, (1167), 1141 states have call predecessors, (1167), 1167 states have call successors, (1167) [2022-11-03 02:26:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 8159 transitions. [2022-11-03 02:26:17,540 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 8159 transitions. Word has length 284 [2022-11-03 02:26:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:17,541 INFO L495 AbstractCegarLoop]: Abstraction has 5431 states and 8159 transitions. [2022-11-03 02:26:17,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 8159 transitions. [2022-11-03 02:26:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-03 02:26:17,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:17,554 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-03 02:26:17,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:26:17,764 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1190193967, now seen corresponding path program 1 times [2022-11-03 02:26:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629109134] [2022-11-03 02:26:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:17,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:17,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:26:17,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099734736] [2022-11-03 02:26:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:17,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:17,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:17,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:17,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:26:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:19,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 3834 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:26:19,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:19,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:19,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629109134] [2022-11-03 02:26:19,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:26:19,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099734736] [2022-11-03 02:26:19,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099734736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:19,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:19,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624178439] [2022-11-03 02:26:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:19,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:19,188 INFO L87 Difference]: Start difference. First operand 5431 states and 8159 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:21,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:26,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:26:29,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:29,195 INFO L93 Difference]: Finished difference Result 14126 states and 21551 transitions. [2022-11-03 02:26:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:29,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 284 [2022-11-03 02:26:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:29,228 INFO L225 Difference]: With dead ends: 14126 [2022-11-03 02:26:29,228 INFO L226 Difference]: Without dead ends: 8730 [2022-11-03 02:26:29,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:29,248 INFO L413 NwaCegarLoop]: 1705 mSDtfsCounter, 542 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:29,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 2953 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2022-11-03 02:26:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2022-11-03 02:26:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 5545. [2022-11-03 02:26:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 4107 states have (on average 1.4497199902605309) internal successors, (5954), 4173 states have internal predecessors, (5954), 1194 states have call successors, (1194), 246 states have call predecessors, (1194), 243 states have return successors, (1191), 1165 states have call predecessors, (1191), 1191 states have call successors, (1191) [2022-11-03 02:26:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 8339 transitions. [2022-11-03 02:26:29,800 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 8339 transitions. Word has length 284 [2022-11-03 02:26:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:29,800 INFO L495 AbstractCegarLoop]: Abstraction has 5545 states and 8339 transitions. [2022-11-03 02:26:29,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 8339 transitions. [2022-11-03 02:26:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-11-03 02:26:29,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:29,812 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-03 02:26:29,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:30,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash 589136355, now seen corresponding path program 1 times [2022-11-03 02:26:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:30,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53939050] [2022-11-03 02:26:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:30,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:26:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477094128] [2022-11-03 02:26:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:30,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:30,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:30,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:26:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 3806 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:26:31,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:31,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:31,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53939050] [2022-11-03 02:26:31,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:26:31,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477094128] [2022-11-03 02:26:31,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477094128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:31,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:31,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:31,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154324186] [2022-11-03 02:26:31,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:31,446 INFO L87 Difference]: Start difference. First operand 5545 states and 8339 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:33,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:36,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:40,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:26:43,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:43,769 INFO L93 Difference]: Finished difference Result 14796 states and 22693 transitions. [2022-11-03 02:26:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 285 [2022-11-03 02:26:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:43,803 INFO L225 Difference]: With dead ends: 14796 [2022-11-03 02:26:43,803 INFO L226 Difference]: Without dead ends: 11049 [2022-11-03 02:26:43,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:43,817 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 1072 mSDsluCounter, 3514 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 103 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 5039 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:43,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 5039 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 499 Invalid, 4 Unknown, 0 Unchecked, 11.6s Time] [2022-11-03 02:26:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2022-11-03 02:26:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 5557. [2022-11-03 02:26:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5557 states, 4119 states have (on average 1.4484098082058752) internal successors, (5966), 4185 states have internal predecessors, (5966), 1194 states have call successors, (1194), 246 states have call predecessors, (1194), 243 states have return successors, (1191), 1165 states have call predecessors, (1191), 1191 states have call successors, (1191) [2022-11-03 02:26:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5557 states to 5557 states and 8351 transitions. [2022-11-03 02:26:44,403 INFO L78 Accepts]: Start accepts. Automaton has 5557 states and 8351 transitions. Word has length 285 [2022-11-03 02:26:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:44,404 INFO L495 AbstractCegarLoop]: Abstraction has 5557 states and 8351 transitions. [2022-11-03 02:26:44,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:26:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5557 states and 8351 transitions. [2022-11-03 02:26:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-03 02:26:44,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:44,415 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-03 02:26:44,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:44,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:44,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1703352346, now seen corresponding path program 1 times [2022-11-03 02:26:44,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:44,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943614862] [2022-11-03 02:26:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:26:45,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943614862] [2022-11-03 02:26:45,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943614862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783220770] [2022-11-03 02:26:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:45,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:45,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:26:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 3852 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:26:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-11-03 02:26:47,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:47,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783220770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:47,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:47,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-03 02:26:47,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237348478] [2022-11-03 02:26:47,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:47,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:47,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:26:47,473 INFO L87 Difference]: Start difference. First operand 5557 states and 8351 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 02:26:48,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:50,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:52,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:00,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:05,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:27:08,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:27:11,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:11,381 INFO L93 Difference]: Finished difference Result 16974 states and 25661 transitions. [2022-11-03 02:27:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:27:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 286 [2022-11-03 02:27:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:11,433 INFO L225 Difference]: With dead ends: 16974 [2022-11-03 02:27:11,433 INFO L226 Difference]: Without dead ends: 16962 [2022-11-03 02:27:11,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:27:11,440 INFO L413 NwaCegarLoop]: 2485 mSDtfsCounter, 3147 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 342 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 6023 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:11,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3196 Valid, 6023 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2252 Invalid, 5 Unknown, 0 Unchecked, 22.7s Time] [2022-11-03 02:27:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16962 states. [2022-11-03 02:27:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16962 to 14716. [2022-11-03 02:27:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14716 states, 10911 states have (on average 1.4511960406928788) internal successors, (15834), 11113 states have internal predecessors, (15834), 3155 states have call successors, (3155), 654 states have call predecessors, (3155), 649 states have return successors, (3152), 3056 states have call predecessors, (3152), 3152 states have call successors, (3152) [2022-11-03 02:27:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14716 states to 14716 states and 22141 transitions. [2022-11-03 02:27:12,708 INFO L78 Accepts]: Start accepts. Automaton has 14716 states and 22141 transitions. Word has length 286 [2022-11-03 02:27:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:12,709 INFO L495 AbstractCegarLoop]: Abstraction has 14716 states and 22141 transitions. [2022-11-03 02:27:12,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 02:27:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 14716 states and 22141 transitions. [2022-11-03 02:27:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-11-03 02:27:12,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:12,726 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-03 02:27:12,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:12,952 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1575587505, now seen corresponding path program 1 times [2022-11-03 02:27:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:12,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474467732] [2022-11-03 02:27:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:27:13,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:13,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474467732] [2022-11-03 02:27:13,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474467732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:13,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:13,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:13,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940279646] [2022-11-03 02:27:13,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:13,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:13,660 INFO L87 Difference]: Start difference. First operand 14716 states and 22141 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:27:15,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:20,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:27:23,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:23,734 INFO L93 Difference]: Finished difference Result 38575 states and 58945 transitions. [2022-11-03 02:27:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 287 [2022-11-03 02:27:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:23,819 INFO L225 Difference]: With dead ends: 38575 [2022-11-03 02:27:23,819 INFO L226 Difference]: Without dead ends: 23894 [2022-11-03 02:27:23,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:23,867 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 550 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:23,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 2748 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 275 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 02:27:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23894 states. [2022-11-03 02:27:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23894 to 14732. [2022-11-03 02:27:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 10927 states have (on average 1.4505353710991122) internal successors, (15850), 11129 states have internal predecessors, (15850), 3155 states have call successors, (3155), 654 states have call predecessors, (3155), 649 states have return successors, (3152), 3056 states have call predecessors, (3152), 3152 states have call successors, (3152) [2022-11-03 02:27:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 22157 transitions. [2022-11-03 02:27:25,446 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 22157 transitions. Word has length 287 [2022-11-03 02:27:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:25,447 INFO L495 AbstractCegarLoop]: Abstraction has 14732 states and 22157 transitions. [2022-11-03 02:27:25,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:27:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 22157 transitions. [2022-11-03 02:27:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-03 02:27:25,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:25,471 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-03 02:27:25,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:27:25,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:25,472 INFO L85 PathProgramCache]: Analyzing trace with hash 843414405, now seen corresponding path program 1 times [2022-11-03 02:27:25,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361646667] [2022-11-03 02:27:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:25,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:27:30,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:30,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361646667] [2022-11-03 02:27:30,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361646667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:30,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:30,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 02:27:30,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568269882] [2022-11-03 02:27:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:27:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:27:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:27:30,372 INFO L87 Difference]: Start difference. First operand 14732 states and 22157 transitions. Second operand has 12 states, 7 states have (on average 16.714285714285715) internal successors, (117), 9 states have internal predecessors, (117), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-03 02:27:32,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:35,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:40,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:42,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:50,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:27:54,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:54,565 INFO L93 Difference]: Finished difference Result 38377 states and 58402 transitions. [2022-11-03 02:27:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:27:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 16.714285714285715) internal successors, (117), 9 states have internal predecessors, (117), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) Word has length 288 [2022-11-03 02:27:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:54,641 INFO L225 Difference]: With dead ends: 38377 [2022-11-03 02:27:54,641 INFO L226 Difference]: Without dead ends: 23680 [2022-11-03 02:27:54,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:27:54,683 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 880 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 152 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 16764 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:54,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 16764 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1710 Invalid, 3 Unknown, 0 Unchecked, 21.6s Time] [2022-11-03 02:27:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23680 states. [2022-11-03 02:27:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23680 to 14796. [2022-11-03 02:27:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14796 states, 10975 states have (on average 1.4485649202733486) internal successors, (15898), 11177 states have internal predecessors, (15898), 3171 states have call successors, (3171), 654 states have call predecessors, (3171), 649 states have return successors, (3168), 3072 states have call predecessors, (3168), 3168 states have call successors, (3168) [2022-11-03 02:27:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14796 states to 14796 states and 22237 transitions. [2022-11-03 02:27:56,438 INFO L78 Accepts]: Start accepts. Automaton has 14796 states and 22237 transitions. Word has length 288 [2022-11-03 02:27:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:56,439 INFO L495 AbstractCegarLoop]: Abstraction has 14796 states and 22237 transitions. [2022-11-03 02:27:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 16.714285714285715) internal successors, (117), 9 states have internal predecessors, (117), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-03 02:27:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 14796 states and 22237 transitions. [2022-11-03 02:27:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-11-03 02:27:56,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:56,465 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-03 02:27:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:27:56,466 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1639066039, now seen corresponding path program 1 times [2022-11-03 02:27:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:56,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398686] [2022-11-03 02:27:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:56,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:27:58,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:58,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398686] [2022-11-03 02:27:58,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:58,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:58,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:27:58,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660434445] [2022-11-03 02:27:58,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:58,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:27:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:58,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:27:58,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:58,821 INFO L87 Difference]: Start difference. First operand 14796 states and 22237 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:28:00,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:04,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:10,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:12,286 INFO L93 Difference]: Finished difference Result 38703 states and 59105 transitions. [2022-11-03 02:28:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:28:12,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 292 [2022-11-03 02:28:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:12,352 INFO L225 Difference]: With dead ends: 38703 [2022-11-03 02:28:12,353 INFO L226 Difference]: Without dead ends: 23942 [2022-11-03 02:28:12,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:28:12,383 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 545 mSDsluCounter, 4746 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 5891 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:12,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 5891 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 574 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2022-11-03 02:28:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23942 states. [2022-11-03 02:28:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23942 to 14860. [2022-11-03 02:28:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14860 states, 11023 states have (on average 1.4466116302277057) internal successors, (15946), 11225 states have internal predecessors, (15946), 3171 states have call successors, (3171), 654 states have call predecessors, (3171), 665 states have return successors, (3216), 3088 states have call predecessors, (3216), 3168 states have call successors, (3216) [2022-11-03 02:28:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14860 states to 14860 states and 22333 transitions. [2022-11-03 02:28:14,134 INFO L78 Accepts]: Start accepts. Automaton has 14860 states and 22333 transitions. Word has length 292 [2022-11-03 02:28:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:14,135 INFO L495 AbstractCegarLoop]: Abstraction has 14860 states and 22333 transitions. [2022-11-03 02:28:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:28:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 14860 states and 22333 transitions. [2022-11-03 02:28:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-03 02:28:14,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:14,153 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-03 02:28:14,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:28:14,153 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 923461111, now seen corresponding path program 1 times [2022-11-03 02:28:14,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:14,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776734325] [2022-11-03 02:28:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:14,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-03 02:28:17,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:17,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776734325] [2022-11-03 02:28:17,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776734325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:17,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:17,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 02:28:17,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402520100] [2022-11-03 02:28:17,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:17,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:28:17,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:28:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:28:17,886 INFO L87 Difference]: Start difference. First operand 14860 states and 22333 transitions. Second operand has 12 states, 7 states have (on average 17.428571428571427) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-03 02:28:19,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:22,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:31,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:35,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:36,416 INFO L93 Difference]: Finished difference Result 38633 states and 58754 transitions. [2022-11-03 02:28:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:28:36,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 17.428571428571427) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) Word has length 295 [2022-11-03 02:28:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:36,479 INFO L225 Difference]: With dead ends: 38633 [2022-11-03 02:28:36,479 INFO L226 Difference]: Without dead ends: 23808 [2022-11-03 02:28:36,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:28:36,508 INFO L413 NwaCegarLoop]: 1584 mSDtfsCounter, 874 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 152 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 16846 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:36,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 16846 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1723 Invalid, 3 Unknown, 0 Unchecked, 15.8s Time] [2022-11-03 02:28:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23808 states. [2022-11-03 02:28:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23808 to 14860. [2022-11-03 02:28:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14860 states, 11023 states have (on average 1.4466116302277057) internal successors, (15946), 11225 states have internal predecessors, (15946), 3171 states have call successors, (3171), 654 states have call predecessors, (3171), 665 states have return successors, (3216), 3088 states have call predecessors, (3216), 3168 states have call successors, (3216) [2022-11-03 02:28:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14860 states to 14860 states and 22333 transitions. [2022-11-03 02:28:38,357 INFO L78 Accepts]: Start accepts. Automaton has 14860 states and 22333 transitions. Word has length 295 [2022-11-03 02:28:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:38,358 INFO L495 AbstractCegarLoop]: Abstraction has 14860 states and 22333 transitions. [2022-11-03 02:28:38,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 17.428571428571427) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-03 02:28:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14860 states and 22333 transitions. [2022-11-03 02:28:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-03 02:28:38,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:38,374 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:28:38,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash -330637040, now seen corresponding path program 1 times [2022-11-03 02:28:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:38,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233935965] [2022-11-03 02:28:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-11-03 02:28:40,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233935965] [2022-11-03 02:28:40,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233935965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:40,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:40,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907686068] [2022-11-03 02:28:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:40,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:28:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:28:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:40,890 INFO L87 Difference]: Start difference. First operand 14860 states and 22333 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-03 02:28:42,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:45,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:49,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:52,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:53,598 INFO L93 Difference]: Finished difference Result 38511 states and 58753 transitions. [2022-11-03 02:28:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:28:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 306 [2022-11-03 02:28:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:53,651 INFO L225 Difference]: With dead ends: 38511 [2022-11-03 02:28:53,651 INFO L226 Difference]: Without dead ends: 23686 [2022-11-03 02:28:53,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:53,679 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 543 mSDsluCounter, 2904 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 4194 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:53,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 4194 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 527 Invalid, 4 Unknown, 0 Unchecked, 10.1s Time] [2022-11-03 02:28:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23686 states. [2022-11-03 02:28:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23686 to 14876. [2022-11-03 02:28:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14876 states, 11039 states have (on average 1.4459643083612645) internal successors, (15962), 11241 states have internal predecessors, (15962), 3171 states have call successors, (3171), 654 states have call predecessors, (3171), 665 states have return successors, (3216), 3088 states have call predecessors, (3216), 3168 states have call successors, (3216) [2022-11-03 02:28:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14876 states to 14876 states and 22349 transitions. [2022-11-03 02:28:55,728 INFO L78 Accepts]: Start accepts. Automaton has 14876 states and 22349 transitions. Word has length 306 [2022-11-03 02:28:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:55,729 INFO L495 AbstractCegarLoop]: Abstraction has 14876 states and 22349 transitions. [2022-11-03 02:28:55,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-03 02:28:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 14876 states and 22349 transitions. [2022-11-03 02:28:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-11-03 02:28:55,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:55,745 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:28:55,745 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1103764927, now seen corresponding path program 1 times [2022-11-03 02:28:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:55,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959107210] [2022-11-03 02:28:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2022-11-03 02:28:57,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959107210] [2022-11-03 02:28:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959107210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271305127] [2022-11-03 02:28:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:57,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:57,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:57,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:28:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:59,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 4087 conjuncts, 456 conjunts are in the unsatisfiable core [2022-11-03 02:28:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:00,199 INFO L356 Elim1Store]: treesize reduction 539, result has 6.3 percent of original size [2022-11-03 02:29:00,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 30 treesize of output 44 [2022-11-03 02:29:00,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:29:00,393 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:29:00,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:29:00,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:29:02,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:02,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:29:02,394 INFO L356 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-03 02:29:02,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-03 02:29:02,446 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-03 02:29:02,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:29:02,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:02,699 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:02,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 02:29:02,720 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:29:02,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:29:02,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:04,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:05,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:05,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:06,077 INFO L356 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-03 02:29:06,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 02:29:06,097 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:29:06,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-03 02:29:08,357 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:08,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 02:29:08,379 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:29:08,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:29:08,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:08,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:08,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:08,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:08,759 INFO L356 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2022-11-03 02:29:08,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 32 treesize of output 57 [2022-11-03 02:29:08,779 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:29:08,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2022-11-03 02:29:13,094 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:13,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-11-03 02:29:13,115 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:29:13,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 16 [2022-11-03 02:29:13,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:13,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:13,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:13,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:13,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:13,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:13,431 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:29:13,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 46 [2022-11-03 02:29:13,586 INFO L356 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2022-11-03 02:29:13,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 37 treesize of output 69 [2022-11-03 02:29:18,066 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:18,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-03 02:29:18,096 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:29:18,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:29:18,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:18,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:18,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:18,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:18,588 INFO L356 Elim1Store]: treesize reduction 132, result has 29.4 percent of original size [2022-11-03 02:29:18,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 42 treesize of output 81 [2022-11-03 02:29:18,618 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:29:18,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 55 [2022-11-03 02:29:23,328 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:23,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2022-11-03 02:29:23,361 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:29:23,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 22 [2022-11-03 02:29:23,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:24,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:29:25,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:25,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:29:25,402 INFO L356 Elim1Store]: treesize reduction 86, result has 33.3 percent of original size [2022-11-03 02:29:25,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 47 treesize of output 76 [2022-11-03 02:29:25,536 INFO L356 Elim1Store]: treesize reduction 122, result has 22.8 percent of original size [2022-11-03 02:29:25,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 62 [2022-11-03 02:29:25,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:29:39,478 WARN L234 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 106 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:29:40,209 INFO L356 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2022-11-03 02:29:40,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 48 [2022-11-03 02:29:40,259 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-03 02:29:40,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 25 [2022-11-03 02:29:40,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:40,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:40,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:40,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:40,648 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-11-03 02:29:40,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 25 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 73 [2022-11-03 02:29:40,874 INFO L356 Elim1Store]: treesize reduction 224, result has 24.6 percent of original size [2022-11-03 02:29:40,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 18 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 26 case distinctions, treesize of input 52 treesize of output 105 [2022-11-03 02:29:51,653 INFO L356 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2022-11-03 02:29:51,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 26 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 52 [2022-11-03 02:29:51,705 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-03 02:29:51,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 28 [2022-11-03 02:29:51,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:29:51,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:51,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:29:51,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,111 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-11-03 02:29:52,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 34 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 82 [2022-11-03 02:29:52,369 INFO L356 Elim1Store]: treesize reduction 242, result has 25.3 percent of original size [2022-11-03 02:29:52,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 57 treesize of output 117 [2022-11-03 02:30:06,416 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:30:06,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 02:30:06,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-03 02:30:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010145565] [2022-11-03 02:30:06,445 INFO L159 IcfgInterpreter]: Started Sifa with 163 locations of interest [2022-11-03 02:30:06,446 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:06,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:06,456 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:06,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:07,189 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:274) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-03 02:30:07,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:07,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2022-11-03 02:30:07,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439539336] [2022-11-03 02:30:07,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:07,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=585, Unknown=10, NotChecked=0, Total=702 [2022-11-03 02:30:07,192 INFO L87 Difference]: Start difference. First operand 14876 states and 22349 transitions. Second operand has 6 states, 4 states have (on average 30.75) internal successors, (123), 6 states have internal predecessors, (123), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-11-03 02:30:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:30:07,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=107, Invalid=585, Unknown=10, NotChecked=0, Total=702 [2022-11-03 02:30:07,195 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:07,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:07,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:07,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:07,412 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@195ca20a at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:30:07,414 INFO L158 Benchmark]: Toolchain (without parser) took 327526.43ms. Allocated memory was 90.2MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 57.5MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-11-03 02:30:07,414 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 62.8MB in the beginning and 62.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:07,414 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2790.68ms. Allocated memory was 90.2MB in the beginning and 188.7MB in the end (delta: 98.6MB). Free memory was 57.3MB in the beginning and 100.4MB in the end (delta: -43.2MB). Peak memory consumption was 55.2MB. Max. memory is 16.1GB. [2022-11-03 02:30:07,414 INFO L158 Benchmark]: Boogie Procedure Inliner took 292.82ms. Allocated memory is still 188.7MB. Free memory was 100.4MB in the beginning and 119.1MB in the end (delta: -18.6MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2022-11-03 02:30:07,415 INFO L158 Benchmark]: Boogie Preprocessor took 250.20ms. Allocated memory is still 188.7MB. Free memory was 119.1MB in the beginning and 97.1MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-03 02:30:07,415 INFO L158 Benchmark]: RCFGBuilder took 6554.15ms. Allocated memory was 188.7MB in the beginning and 295.7MB in the end (delta: 107.0MB). Free memory was 97.1MB in the beginning and 83.0MB in the end (delta: 14.0MB). Peak memory consumption was 130.4MB. Max. memory is 16.1GB. [2022-11-03 02:30:07,415 INFO L158 Benchmark]: TraceAbstraction took 317629.85ms. Allocated memory was 295.7MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 82.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 966.7MB. Max. memory is 16.1GB. [2022-11-03 02:30:07,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 62.8MB in the beginning and 62.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2790.68ms. Allocated memory was 90.2MB in the beginning and 188.7MB in the end (delta: 98.6MB). Free memory was 57.3MB in the beginning and 100.4MB in the end (delta: -43.2MB). Peak memory consumption was 55.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 292.82ms. Allocated memory is still 188.7MB. Free memory was 100.4MB in the beginning and 119.1MB in the end (delta: -18.6MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 250.20ms. Allocated memory is still 188.7MB. Free memory was 119.1MB in the beginning and 97.1MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * RCFGBuilder took 6554.15ms. Allocated memory was 188.7MB in the beginning and 295.7MB in the end (delta: 107.0MB). Free memory was 97.1MB in the beginning and 83.0MB in the end (delta: 14.0MB). Peak memory consumption was 130.4MB. Max. memory is 16.1GB. * TraceAbstraction took 317629.85ms. Allocated memory was 295.7MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 82.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 966.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@195ca20a de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@195ca20a: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- 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 [2022-11-03 02:30:09,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:30:09,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:30:09,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:30:09,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:30:09,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:30:09,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:30:09,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:30:09,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:30:09,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:30:09,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:30:09,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:30:09,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:30:09,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:30:09,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:30:09,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:30:09,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:30:09,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:30:09,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:30:09,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:30:09,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:30:09,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:30:09,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:30:09,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:30:09,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:30:09,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:30:09,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:30:09,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:30:09,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:30:09,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:30:09,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:30:09,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:30:09,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:30:09,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:30:09,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:30:09,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:30:09,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:30:09,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:30:09,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:30:09,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:30:09,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:30:09,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:30:09,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:30:09,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:30:09,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:30:09,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:30:09,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:30:09,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:30:09,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:30:09,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:30:09,819 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:30:09,819 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:30:09,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:30:09,821 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:30:09,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:30:09,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:30:09,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:30:09,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:30:09,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:30:09,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:30:09,823 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:30:09,824 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:30:09,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:30:09,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:30:09,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:30:09,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:30:09,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:30:09,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:30:09,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:09,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:30:09,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:30:09,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:30:09,826 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:30:09,826 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:09,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:30:09,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:30:09,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:30:09,827 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2022-11-03 02:30:10,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:30:10,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:30:10,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:30:10,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:30:10,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:30:10,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-03 02:30:10,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/1bc67a673/f4a0767e899342d283d77ff0f10a18ef/FLAG21e45cf6e [2022-11-03 02:30:11,218 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:30:11,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-03 02:30:11,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/1bc67a673/f4a0767e899342d283d77ff0f10a18ef/FLAG21e45cf6e [2022-11-03 02:30:11,705 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/data/1bc67a673/f4a0767e899342d283d77ff0f10a18ef [2022-11-03 02:30:11,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:30:11,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:30:11,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:11,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:30:11,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:30:11,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:11" (1/1) ... [2022-11-03 02:30:11,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b33ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:11, skipping insertion in model container [2022-11-03 02:30:11,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:11" (1/1) ... [2022-11-03 02:30:11,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:30:11,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:13,461 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-03 02:30:13,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:13,673 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:30:13,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:14,090 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-03 02:30:14,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:14,126 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:30:14,522 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_7c35f90d-7217-474d-bbfc-4033b5024c3f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-03 02:30:14,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:14,644 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:30:14,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14 WrapperNode [2022-11-03 02:30:14,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:14,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:14,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:30:14,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:30:14,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:14,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,027 INFO L138 Inliner]: procedures = 229, calls = 1591, calls flagged for inlining = 84, calls inlined = 76, statements flattened = 4304 [2022-11-03 02:30:15,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:15,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:30:15,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:30:15,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:30:15,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:30:15,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:30:15,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:30:15,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:30:15,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (1/1) ... [2022-11-03 02:30:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:15,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:15,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:30:15,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:30:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_get_mode [2022-11-03 02:30:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_get_mode [2022-11-03 02:30:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:30:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2022-11-03 02:30:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2022-11-03 02:30:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 02:30:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:30:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-03 02:30:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:30:15,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:30:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:30:15,331 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:30:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-03 02:30:15,331 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-03 02:30:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_format [2022-11-03 02:30:15,332 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_format [2022-11-03 02:30:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:30:15,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:30:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure raid_io_hints [2022-11-03 02:30:15,333 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_io_hints [2022-11-03 02:30:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure raid_message [2022-11-03 02:30:15,333 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_message [2022-11-03 02:30:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:30:15,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:30:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:30:15,334 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:30:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_copies [2022-11-03 02:30:15,335 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_copies [2022-11-03 02:30:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:30:15,335 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:30:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:30:15,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:30:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure context_free [2022-11-03 02:30:15,336 INFO L138 BoogieDeclarations]: Found implementation of procedure context_free [2022-11-03 02:30:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:30:15,337 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:30:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-03 02:30:15,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-03 02:30:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure super_validate [2022-11-03 02:30:15,338 INFO L138 BoogieDeclarations]: Found implementation of procedure super_validate [2022-11-03 02:30:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure do_table_event [2022-11-03 02:30:15,338 INFO L138 BoogieDeclarations]: Found implementation of procedure do_table_event [2022-11-03 02:30:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:30:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:30:15,339 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:30:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:30:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure sync_page_io [2022-11-03 02:30:15,340 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_page_io [2022-11-03 02:30:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:30:15,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:30:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure to_sector [2022-11-03 02:30:15,343 INFO L138 BoogieDeclarations]: Found implementation of procedure to_sector [2022-11-03 02:30:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 02:30:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-03 02:30:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:30:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:30:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:30:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:30:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-03 02:30:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-03 02:30:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure raid_iterate_devices [2022-11-03 02:30:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_iterate_devices [2022-11-03 02:30:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2022-11-03 02:30:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2022-11-03 02:30:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2022-11-03 02:30:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2022-11-03 02:30:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure mddev_suspend [2022-11-03 02:30:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure mddev_suspend [2022-11-03 02:30:15,349 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:30:15,349 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:30:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure super_sync [2022-11-03 02:30:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure super_sync [2022-11-03 02:30:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure is_power_of_2 [2022-11-03 02:30:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure is_power_of_2 [2022-11-03 02:30:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-03 02:30:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-03 02:30:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2022-11-03 02:30:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2022-11-03 02:30:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:30:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:30:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:30:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure raid_merge [2022-11-03 02:30:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_merge [2022-11-03 02:30:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:30:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:30:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure raid_map [2022-11-03 02:30:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_map [2022-11-03 02:30:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:30:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:30:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-11-03 02:30:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2022-11-03 02:30:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure md_stop [2022-11-03 02:30:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure md_stop [2022-11-03 02:30:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure raid_status [2022-11-03 02:30:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_status [2022-11-03 02:30:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2022-11-03 02:30:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2022-11-03 02:30:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:30:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:30:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure raid_dtr [2022-11-03 02:30:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_dtr [2022-11-03 02:30:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2022-11-03 02:30:15,359 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2022-11-03 02:30:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:30:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:30:15,360 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 02:30:15,360 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 02:30:16,155 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:30:16,160 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:30:18,117 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:30:44,525 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:30:44,551 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:30:44,564 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:30:44,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:44 BoogieIcfgContainer [2022-11-03 02:30:44,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:30:44,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:30:44,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:30:44,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:30:44,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:30:11" (1/3) ... [2022-11-03 02:30:44,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7d908e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:44, skipping insertion in model container [2022-11-03 02:30:44,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:14" (2/3) ... [2022-11-03 02:30:44,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7d908e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:44, skipping insertion in model container [2022-11-03 02:30:44,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:44" (3/3) ... [2022-11-03 02:30:44,583 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-03 02:30:44,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:30:44,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:30:44,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:30:44,704 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=FINITE_AUTOMATA, 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;@574632a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:30:44,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:30:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 1134 states, 873 states have (on average 1.4421534936998854) internal successors, (1259), 894 states have internal predecessors, (1259), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-03 02:30:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-03 02:30:44,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:44,730 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:44,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1014089832, now seen corresponding path program 1 times [2022-11-03 02:30:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:44,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893363031] [2022-11-03 02:30:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:44,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:44,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:30:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:30:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-11-03 02:30:46,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:46,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:46,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893363031] [2022-11-03 02:30:46,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893363031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:46,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:46,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:30:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831923940] [2022-11-03 02:30:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:46,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:30:46,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:30:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:30:46,252 INFO L87 Difference]: Start difference. First operand has 1134 states, 873 states have (on average 1.4421534936998854) internal successors, (1259), 894 states have internal predecessors, (1259), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:30:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:46,422 INFO L93 Difference]: Finished difference Result 2263 states and 3384 transitions. [2022-11-03 02:30:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:30:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 221 [2022-11-03 02:30:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:46,452 INFO L225 Difference]: With dead ends: 2263 [2022-11-03 02:30:46,452 INFO L226 Difference]: Without dead ends: 1122 [2022-11-03 02:30:46,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:30:46,475 INFO L413 NwaCegarLoop]: 1679 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:46,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-03 02:30:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2022-11-03 02:30:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 867 states have (on average 1.4359861591695502) internal successors, (1245), 882 states have internal predecessors, (1245), 212 states have call successors, (212), 43 states have call predecessors, (212), 42 states have return successors, (207), 203 states have call predecessors, (207), 207 states have call successors, (207) [2022-11-03 02:30:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1664 transitions. [2022-11-03 02:30:46,708 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1664 transitions. Word has length 221 [2022-11-03 02:30:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:46,709 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1664 transitions. [2022-11-03 02:30:46,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:30:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1664 transitions. [2022-11-03 02:30:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-03 02:30:46,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:46,729 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:46,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:46,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:46,945 INFO L85 PathProgramCache]: Analyzing trace with hash -814978680, now seen corresponding path program 1 times [2022-11-03 02:30:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:46,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723316510] [2022-11-03 02:30:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:46,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:46,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:46,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:47,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:30:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:48,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:30:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-11-03 02:30:48,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:48,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723316510] [2022-11-03 02:30:48,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723316510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:48,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:48,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:30:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068884730] [2022-11-03 02:30:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:48,435 INFO L87 Difference]: Start difference. First operand 1122 states and 1664 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:30:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:49,028 INFO L93 Difference]: Finished difference Result 2230 states and 3313 transitions. [2022-11-03 02:30:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 221 [2022-11-03 02:30:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:49,045 INFO L225 Difference]: With dead ends: 2230 [2022-11-03 02:30:49,046 INFO L226 Difference]: Without dead ends: 1125 [2022-11-03 02:30:49,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:30:49,053 INFO L413 NwaCegarLoop]: 1653 mSDtfsCounter, 6 mSDsluCounter, 6588 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8241 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:49,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 8241 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:30:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-03 02:30:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1125. [2022-11-03 02:30:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 869 states have (on average 1.4361334867663982) internal successors, (1248), 885 states have internal predecessors, (1248), 212 states have call successors, (212), 43 states have call predecessors, (212), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2022-11-03 02:30:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1668 transitions. [2022-11-03 02:30:49,144 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1668 transitions. Word has length 221 [2022-11-03 02:30:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:49,146 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1668 transitions. [2022-11-03 02:30:49,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:30:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1668 transitions. [2022-11-03 02:30:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-03 02:30:49,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:49,151 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:49,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:49,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:49,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1060024339, now seen corresponding path program 1 times [2022-11-03 02:30:49,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:49,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677060450] [2022-11-03 02:30:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:49,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:49,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:30:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:50,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-03 02:30:50,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-03 02:30:51,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677060450] [2022-11-03 02:30:51,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677060450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:51,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1976900868] [2022-11-03 02:30:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:51,805 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:51,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:51,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:30:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-03 02:30:54,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1976900868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:54,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:54,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 7] total 12 [2022-11-03 02:30:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058595229] [2022-11-03 02:30:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:54,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:30:54,453 INFO L87 Difference]: Start difference. First operand 1125 states and 1668 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:30:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:54,535 INFO L93 Difference]: Finished difference Result 1127 states and 1669 transitions. [2022-11-03 02:30:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 228 [2022-11-03 02:30:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:54,544 INFO L225 Difference]: With dead ends: 1127 [2022-11-03 02:30:54,544 INFO L226 Difference]: Without dead ends: 1124 [2022-11-03 02:30:54,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 671 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:30:54,546 INFO L413 NwaCegarLoop]: 1661 mSDtfsCounter, 1582 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:54,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 1661 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-03 02:30:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2022-11-03 02:30:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 869 states have (on average 1.4349827387802072) internal successors, (1247), 884 states have internal predecessors, (1247), 211 states have call successors, (211), 43 states have call predecessors, (211), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2022-11-03 02:30:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1666 transitions. [2022-11-03 02:30:54,614 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1666 transitions. Word has length 228 [2022-11-03 02:30:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:54,616 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1666 transitions. [2022-11-03 02:30:54,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:30:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1666 transitions. [2022-11-03 02:30:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-11-03 02:30:54,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:54,623 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:54,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:54,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:55,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:55,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:55,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1498681330, now seen corresponding path program 1 times [2022-11-03 02:30:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:55,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708092289] [2022-11-03 02:30:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:55,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:55,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:55,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:30:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:56,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:56,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-03 02:30:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-03 02:30:57,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:57,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708092289] [2022-11-03 02:30:57,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708092289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:57,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814178115] [2022-11-03 02:30:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:57,213 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:57,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:57,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:57,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:30:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-03 02:30:59,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:59,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814178115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:59,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:59,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 7] total 12 [2022-11-03 02:30:59,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912187561] [2022-11-03 02:30:59,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:59,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:59,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:30:59,673 INFO L87 Difference]: Start difference. First operand 1124 states and 1666 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:30:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:59,746 INFO L93 Difference]: Finished difference Result 1126 states and 1667 transitions. [2022-11-03 02:30:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 229 [2022-11-03 02:30:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:59,754 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 02:30:59,754 INFO L226 Difference]: Without dead ends: 1123 [2022-11-03 02:30:59,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:30:59,756 INFO L413 NwaCegarLoop]: 1659 mSDtfsCounter, 1579 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:59,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1579 Valid, 1659 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-11-03 02:30:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2022-11-03 02:30:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 869 states have (on average 1.433831990794016) internal successors, (1246), 883 states have internal predecessors, (1246), 210 states have call successors, (210), 43 states have call predecessors, (210), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2022-11-03 02:30:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1664 transitions. [2022-11-03 02:30:59,828 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1664 transitions. Word has length 229 [2022-11-03 02:30:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:59,830 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1664 transitions. [2022-11-03 02:30:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:30:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1664 transitions. [2022-11-03 02:30:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 02:30:59,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:59,836 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:59,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-03 02:31:00,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:00,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:00,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash -785816688, now seen corresponding path program 1 times [2022-11-03 02:31:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:00,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241138728] [2022-11-03 02:31:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:00,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:00,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:31:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:01,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-03 02:31:01,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-03 02:31:02,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:02,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241138728] [2022-11-03 02:31:02,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241138728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:02,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1886176326] [2022-11-03 02:31:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:02,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:02,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:02,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:31:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:03,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:31:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-03 02:31:05,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:05,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1886176326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:05,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:05,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 7] total 12 [2022-11-03 02:31:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908367039] [2022-11-03 02:31:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:05,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:05,158 INFO L87 Difference]: Start difference. First operand 1123 states and 1664 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:31:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:05,243 INFO L93 Difference]: Finished difference Result 1125 states and 1665 transitions. [2022-11-03 02:31:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 230 [2022-11-03 02:31:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:05,251 INFO L225 Difference]: With dead ends: 1125 [2022-11-03 02:31:05,251 INFO L226 Difference]: Without dead ends: 1122 [2022-11-03 02:31:05,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 677 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:05,254 INFO L413 NwaCegarLoop]: 1657 mSDtfsCounter, 1576 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:05,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1576 Valid, 1657 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-03 02:31:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2022-11-03 02:31:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 869 states have (on average 1.432681242807825) internal successors, (1245), 882 states have internal predecessors, (1245), 209 states have call successors, (209), 43 states have call predecessors, (209), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2022-11-03 02:31:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1662 transitions. [2022-11-03 02:31:05,338 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1662 transitions. Word has length 230 [2022-11-03 02:31:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:05,343 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1662 transitions. [2022-11-03 02:31:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:31:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1662 transitions. [2022-11-03 02:31:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-03 02:31:05,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:05,348 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:05,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:05,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:05,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:05,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1409193653, now seen corresponding path program 1 times [2022-11-03 02:31:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109139846] [2022-11-03 02:31:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:05,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:05,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:05,770 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:05,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:31:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:07,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-03 02:31:07,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-03 02:31:07,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109139846] [2022-11-03 02:31:07,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109139846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1308263420] [2022-11-03 02:31:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:07,966 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:07,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:07,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:31:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:31:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-03 02:31:10,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:10,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1308263420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:10,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:10,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 7] total 12 [2022-11-03 02:31:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785556848] [2022-11-03 02:31:10,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:10,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:10,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:10,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:10,291 INFO L87 Difference]: Start difference. First operand 1122 states and 1662 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:31:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:10,473 INFO L93 Difference]: Finished difference Result 2188 states and 3250 transitions. [2022-11-03 02:31:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 231 [2022-11-03 02:31:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:10,491 INFO L225 Difference]: With dead ends: 2188 [2022-11-03 02:31:10,492 INFO L226 Difference]: Without dead ends: 2177 [2022-11-03 02:31:10,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:10,496 INFO L413 NwaCegarLoop]: 1846 mSDtfsCounter, 1549 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:10,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 3447 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-11-03 02:31:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 2174. [2022-11-03 02:31:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1694 states have (on average 1.4403778040141677) internal successors, (2440), 1717 states have internal predecessors, (2440), 397 states have call successors, (397), 83 states have call predecessors, (397), 82 states have return successors, (396), 386 states have call predecessors, (396), 395 states have call successors, (396) [2022-11-03 02:31:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3233 transitions. [2022-11-03 02:31:10,739 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3233 transitions. Word has length 231 [2022-11-03 02:31:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:10,740 INFO L495 AbstractCegarLoop]: Abstraction has 2174 states and 3233 transitions. [2022-11-03 02:31:10,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 02:31:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3233 transitions. [2022-11-03 02:31:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-11-03 02:31:10,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:10,753 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-03 02:31:10,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:10,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:11,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:11,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1674706325, now seen corresponding path program 1 times [2022-11-03 02:31:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:11,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20710192] [2022-11-03 02:31:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:11,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:11,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:11,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:31:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2402 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:13,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2022-11-03 02:31:13,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2022-11-03 02:31:14,128 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20710192] [2022-11-03 02:31:14,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20710192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135257872] [2022-11-03 02:31:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:14,129 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:14,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:14,132 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:14,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:31:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2402 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:31:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2022-11-03 02:31:15,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:15,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135257872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:15,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:15,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 12 [2022-11-03 02:31:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27944266] [2022-11-03 02:31:15,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:15,889 INFO L87 Difference]: Start difference. First operand 2174 states and 3233 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:31:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:16,668 INFO L93 Difference]: Finished difference Result 4424 states and 6569 transitions. [2022-11-03 02:31:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:16,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 337 [2022-11-03 02:31:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:16,681 INFO L225 Difference]: With dead ends: 4424 [2022-11-03 02:31:16,681 INFO L226 Difference]: Without dead ends: 2287 [2022-11-03 02:31:16,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:16,691 INFO L413 NwaCegarLoop]: 1674 mSDtfsCounter, 137 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:16,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 3161 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:31:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-03 02:31:16,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2274. [2022-11-03 02:31:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 1779 states have (on average 1.4395727937043283) internal successors, (2561), 1801 states have internal predecessors, (2561), 407 states have call successors, (407), 89 states have call predecessors, (407), 87 states have return successors, (405), 396 states have call predecessors, (405), 405 states have call successors, (405) [2022-11-03 02:31:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3373 transitions. [2022-11-03 02:31:16,897 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3373 transitions. Word has length 337 [2022-11-03 02:31:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:16,898 INFO L495 AbstractCegarLoop]: Abstraction has 2274 states and 3373 transitions. [2022-11-03 02:31:16,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:31:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3373 transitions. [2022-11-03 02:31:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-03 02:31:16,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:16,911 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:31:16,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:17,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:17,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:17,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:17,332 INFO L85 PathProgramCache]: Analyzing trace with hash 316387060, now seen corresponding path program 1 times [2022-11-03 02:31:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:17,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153968688] [2022-11-03 02:31:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:17,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:17,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:17,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:17,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:31:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:31:19,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:31:19,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153968688] [2022-11-03 02:31:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153968688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388575065] [2022-11-03 02:31:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:19,908 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:19,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:19,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:31:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:31:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-11-03 02:31:21,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:21,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1388575065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:21,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:21,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 12 [2022-11-03 02:31:21,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727258380] [2022-11-03 02:31:21,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:21,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:21,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:21,665 INFO L87 Difference]: Start difference. First operand 2274 states and 3373 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:21,872 INFO L93 Difference]: Finished difference Result 4492 states and 6678 transitions. [2022-11-03 02:31:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:21,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 365 [2022-11-03 02:31:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:21,888 INFO L225 Difference]: With dead ends: 4492 [2022-11-03 02:31:21,888 INFO L226 Difference]: Without dead ends: 2276 [2022-11-03 02:31:21,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:21,898 INFO L413 NwaCegarLoop]: 1657 mSDtfsCounter, 0 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:21,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3309 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2022-11-03 02:31:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2276. [2022-11-03 02:31:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 1781 states have (on average 1.4390791690061764) internal successors, (2563), 1803 states have internal predecessors, (2563), 407 states have call successors, (407), 89 states have call predecessors, (407), 87 states have return successors, (405), 396 states have call predecessors, (405), 405 states have call successors, (405) [2022-11-03 02:31:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3375 transitions. [2022-11-03 02:31:22,097 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3375 transitions. Word has length 365 [2022-11-03 02:31:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:22,098 INFO L495 AbstractCegarLoop]: Abstraction has 2276 states and 3375 transitions. [2022-11-03 02:31:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3375 transitions. [2022-11-03 02:31:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-03 02:31:22,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:22,111 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:31:22,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:22,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:22,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash -740344142, now seen corresponding path program 1 times [2022-11-03 02:31:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:22,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30286008] [2022-11-03 02:31:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:22,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:22,540 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:22,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:31:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:24,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:31:24,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:31:25,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30286008] [2022-11-03 02:31:25,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30286008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:25,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1772441831] [2022-11-03 02:31:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:25,283 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:25,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:25,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:25,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:31:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:26,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:31:27,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:31:27,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1772441831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:27,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:27,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 12 [2022-11-03 02:31:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202278601] [2022-11-03 02:31:27,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:27,119 INFO L87 Difference]: Start difference. First operand 2276 states and 3375 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:28,174 INFO L93 Difference]: Finished difference Result 5705 states and 8620 transitions. [2022-11-03 02:31:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:28,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 365 [2022-11-03 02:31:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:28,218 INFO L225 Difference]: With dead ends: 5705 [2022-11-03 02:31:28,218 INFO L226 Difference]: Without dead ends: 3487 [2022-11-03 02:31:28,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:28,231 INFO L413 NwaCegarLoop]: 2297 mSDtfsCounter, 695 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 4026 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:28,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 4026 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:31:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-11-03 02:31:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2346. [2022-11-03 02:31:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 1837 states have (on average 1.437670114316821) internal successors, (2641), 1859 states have internal predecessors, (2641), 421 states have call successors, (421), 89 states have call predecessors, (421), 87 states have return successors, (419), 410 states have call predecessors, (419), 419 states have call successors, (419) [2022-11-03 02:31:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3481 transitions. [2022-11-03 02:31:28,478 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3481 transitions. Word has length 365 [2022-11-03 02:31:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:28,479 INFO L495 AbstractCegarLoop]: Abstraction has 2346 states and 3481 transitions. [2022-11-03 02:31:28,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3481 transitions. [2022-11-03 02:31:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-03 02:31:28,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:28,491 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:31:28,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:28,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:28,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:28,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1439590795, now seen corresponding path program 1 times [2022-11-03 02:31:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:28,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222089086] [2022-11-03 02:31:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:28,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:28,911 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:28,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:31:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2439 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:31:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:31:31,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222089086] [2022-11-03 02:31:31,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222089086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [679263378] [2022-11-03 02:31:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:31,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:31,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:31,803 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:31,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:31:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 2439 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:31:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:31:34,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [679263378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:34,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:34,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 13 [2022-11-03 02:31:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593450697] [2022-11-03 02:31:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:34,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:31:34,075 INFO L87 Difference]: Start difference. First operand 2346 states and 3481 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:34,592 INFO L93 Difference]: Finished difference Result 5921 states and 8950 transitions. [2022-11-03 02:31:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 366 [2022-11-03 02:31:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:34,620 INFO L225 Difference]: With dead ends: 5921 [2022-11-03 02:31:34,621 INFO L226 Difference]: Without dead ends: 3633 [2022-11-03 02:31:34,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1084 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:31:34,633 INFO L413 NwaCegarLoop]: 2288 mSDtfsCounter, 694 mSDsluCounter, 4017 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 6305 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:34,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 6305 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2022-11-03 02:31:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2490. [2022-11-03 02:31:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1953 states have (on average 1.4352278545826933) internal successors, (2803), 1975 states have internal predecessors, (2803), 449 states have call successors, (449), 89 states have call predecessors, (449), 87 states have return successors, (447), 438 states have call predecessors, (447), 447 states have call successors, (447) [2022-11-03 02:31:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3699 transitions. [2022-11-03 02:31:34,941 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3699 transitions. Word has length 366 [2022-11-03 02:31:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:34,942 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3699 transitions. [2022-11-03 02:31:34,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3699 transitions. [2022-11-03 02:31:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-11-03 02:31:34,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:34,956 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:31:35,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:35,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:35,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash -847738022, now seen corresponding path program 1 times [2022-11-03 02:31:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:35,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808338879] [2022-11-03 02:31:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:35,384 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:35,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:31:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:31:37,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:31:38,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808338879] [2022-11-03 02:31:38,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808338879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2088991837] [2022-11-03 02:31:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:38,299 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:38,300 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:38,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:31:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:31:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:31:40,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:40,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2088991837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:40,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:40,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 13 [2022-11-03 02:31:40,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937493451] [2022-11-03 02:31:40,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:40,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:40,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:31:40,731 INFO L87 Difference]: Start difference. First operand 2490 states and 3699 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:42,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:43,807 INFO L93 Difference]: Finished difference Result 6245 states and 9459 transitions. [2022-11-03 02:31:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 367 [2022-11-03 02:31:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:43,834 INFO L225 Difference]: With dead ends: 6245 [2022-11-03 02:31:43,835 INFO L226 Difference]: Without dead ends: 3813 [2022-11-03 02:31:43,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1088 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:31:43,900 INFO L413 NwaCegarLoop]: 2219 mSDtfsCounter, 975 mSDsluCounter, 4040 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 124 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 6259 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:43,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 6259 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 22 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:31:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-11-03 02:31:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2494. [2022-11-03 02:31:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1957 states have (on average 1.4343382728666325) internal successors, (2807), 1979 states have internal predecessors, (2807), 449 states have call successors, (449), 89 states have call predecessors, (449), 87 states have return successors, (447), 438 states have call predecessors, (447), 447 states have call successors, (447) [2022-11-03 02:31:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3703 transitions. [2022-11-03 02:31:44,177 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3703 transitions. Word has length 367 [2022-11-03 02:31:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:44,178 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3703 transitions. [2022-11-03 02:31:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3703 transitions. [2022-11-03 02:31:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-03 02:31:44,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:44,190 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:31:44,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:44,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:44,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:44,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2016280764, now seen corresponding path program 1 times [2022-11-03 02:31:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:44,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728827592] [2022-11-03 02:31:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:44,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:44,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:44,615 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:44,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:31:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:46,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:31:46,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:31:47,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728827592] [2022-11-03 02:31:47,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728827592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526166488] [2022-11-03 02:31:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:47,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:47,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:31:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:31:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:31:50,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:50,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526166488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:50,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:50,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 12 [2022-11-03 02:31:50,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790176427] [2022-11-03 02:31:50,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:50,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:50,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:50,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:50,286 INFO L87 Difference]: Start difference. First operand 2494 states and 3703 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:50,782 INFO L93 Difference]: Finished difference Result 4932 states and 7338 transitions. [2022-11-03 02:31:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 386 [2022-11-03 02:31:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:50,798 INFO L225 Difference]: With dead ends: 4932 [2022-11-03 02:31:50,799 INFO L226 Difference]: Without dead ends: 2496 [2022-11-03 02:31:50,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 1145 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:50,811 INFO L413 NwaCegarLoop]: 1657 mSDtfsCounter, 0 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:50,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3309 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:31:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-11-03 02:31:51,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2022-11-03 02:31:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 1959 states have (on average 1.4338948443083206) internal successors, (2809), 1981 states have internal predecessors, (2809), 449 states have call successors, (449), 89 states have call predecessors, (449), 87 states have return successors, (447), 438 states have call predecessors, (447), 447 states have call successors, (447) [2022-11-03 02:31:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3705 transitions. [2022-11-03 02:31:51,144 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3705 transitions. Word has length 386 [2022-11-03 02:31:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:51,145 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 3705 transitions. [2022-11-03 02:31:51,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:31:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3705 transitions. [2022-11-03 02:31:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-03 02:31:51,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:51,157 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:31:51,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:51,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:51,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:51,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1939379966, now seen corresponding path program 1 times [2022-11-03 02:31:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761961560] [2022-11-03 02:31:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:51,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:51,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:51,589 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:51,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:31:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:54,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:31:54,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:31:55,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761961560] [2022-11-03 02:31:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761961560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1808952190] [2022-11-03 02:31:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:55,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:55,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:31:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:57,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:31:57,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:31:57,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:57,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1808952190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:57,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:57,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 13 [2022-11-03 02:31:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896910801] [2022-11-03 02:31:57,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:31:57,610 INFO L87 Difference]: Start difference. First operand 2496 states and 3705 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-03 02:31:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:59,453 INFO L93 Difference]: Finished difference Result 9117 states and 13968 transitions. [2022-11-03 02:31:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 386 [2022-11-03 02:31:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:59,507 INFO L225 Difference]: With dead ends: 9117 [2022-11-03 02:31:59,507 INFO L226 Difference]: Without dead ends: 6679 [2022-11-03 02:31:59,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 1145 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:31:59,524 INFO L413 NwaCegarLoop]: 2733 mSDtfsCounter, 2350 mSDsluCounter, 4605 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 7338 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:59,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2570 Valid, 7338 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:31:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6679 states. [2022-11-03 02:31:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6679 to 2634. [2022-11-03 02:31:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2067 states have (on average 1.4441219158200291) internal successors, (2985), 2089 states have internal predecessors, (2985), 479 states have call successors, (479), 89 states have call predecessors, (479), 87 states have return successors, (477), 468 states have call predecessors, (477), 477 states have call successors, (477) [2022-11-03 02:31:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3941 transitions. [2022-11-03 02:31:59,957 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3941 transitions. Word has length 386 [2022-11-03 02:31:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:59,958 INFO L495 AbstractCegarLoop]: Abstraction has 2634 states and 3941 transitions. [2022-11-03 02:31:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-03 02:31:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3941 transitions. [2022-11-03 02:31:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-03 02:31:59,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:59,974 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:32:00,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:00,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:00,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:00,388 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1960807295, now seen corresponding path program 1 times [2022-11-03 02:32:00,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:00,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413270024] [2022-11-03 02:32:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:00,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:00,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:00,393 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:00,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:32:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:32:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:32:03,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:32:03,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413270024] [2022-11-03 02:32:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413270024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348089083] [2022-11-03 02:32:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:03,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:03,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:03,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:32:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:32:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:32:06,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:32:06,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [348089083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:06,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:32:06,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 13 [2022-11-03 02:32:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034721516] [2022-11-03 02:32:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:32:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:32:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:32:06,780 INFO L87 Difference]: Start difference. First operand 2634 states and 3941 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:32:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:07,805 INFO L93 Difference]: Finished difference Result 6204 states and 9420 transitions. [2022-11-03 02:32:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:32:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 387 [2022-11-03 02:32:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:07,823 INFO L225 Difference]: With dead ends: 6204 [2022-11-03 02:32:07,824 INFO L226 Difference]: Without dead ends: 3628 [2022-11-03 02:32:07,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 1148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:32:07,836 INFO L413 NwaCegarLoop]: 2084 mSDtfsCounter, 700 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 5787 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:07,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 5787 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:32:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2022-11-03 02:32:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 2638. [2022-11-03 02:32:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2071 states have (on average 1.4432641236117818) internal successors, (2989), 2093 states have internal predecessors, (2989), 479 states have call successors, (479), 89 states have call predecessors, (479), 87 states have return successors, (477), 468 states have call predecessors, (477), 477 states have call successors, (477) [2022-11-03 02:32:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3945 transitions. [2022-11-03 02:32:08,283 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3945 transitions. Word has length 387 [2022-11-03 02:32:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:08,284 INFO L495 AbstractCegarLoop]: Abstraction has 2638 states and 3945 transitions. [2022-11-03 02:32:08,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 02:32:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3945 transitions. [2022-11-03 02:32:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-03 02:32:08,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:08,295 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:32:08,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:08,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:32:08,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:32:08,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1927993282, now seen corresponding path program 1 times [2022-11-03 02:32:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163928320] [2022-11-03 02:32:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:08,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:08,735 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:08,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:32:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:11,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:32:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-03 02:32:11,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2022-11-03 02:32:12,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:12,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163928320] [2022-11-03 02:32:12,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163928320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:12,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1510853232] [2022-11-03 02:32:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:12,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:12,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:12,205 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:12,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 02:32:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:14,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-11-03 02:32:15,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:32:16,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1510853232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140672622] [2022-11-03 02:32:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:16,923 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:16,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 02:32:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:19,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-11-03 02:32:19,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-11-03 02:32:20,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140672622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:20,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:20,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 4, 4, 4] total 15 [2022-11-03 02:32:20,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845437383] [2022-11-03 02:32:20,745 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:20,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:32:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:32:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:32:20,749 INFO L87 Difference]: Start difference. First operand 2638 states and 3945 transitions. Second operand has 15 states, 13 states have (on average 34.53846153846154) internal successors, (449), 15 states have internal predecessors, (449), 6 states have call successors, (81), 3 states have call predecessors, (81), 6 states have return successors, (82), 6 states have call predecessors, (82), 6 states have call successors, (82) [2022-11-03 02:32:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:37,948 INFO L93 Difference]: Finished difference Result 18215 states and 27318 transitions. [2022-11-03 02:32:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:32:37,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 34.53846153846154) internal successors, (449), 15 states have internal predecessors, (449), 6 states have call successors, (81), 3 states have call predecessors, (81), 6 states have return successors, (82), 6 states have call predecessors, (82), 6 states have call successors, (82) Word has length 389 [2022-11-03 02:32:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:38,017 INFO L225 Difference]: With dead ends: 18215 [2022-11-03 02:32:38,017 INFO L226 Difference]: Without dead ends: 15606 [2022-11-03 02:32:38,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2356 GetRequests, 2316 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:32:38,035 INFO L413 NwaCegarLoop]: 3995 mSDtfsCounter, 12044 mSDsluCounter, 25181 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 2007 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12059 SdHoareTripleChecker+Valid, 29176 SdHoareTripleChecker+Invalid, 4500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2007 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:38,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12059 Valid, 29176 Invalid, 4500 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2007 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-11-03 02:32:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2022-11-03 02:32:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15473. [2022-11-03 02:32:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15473 states, 12199 states have (on average 1.450610705795557) internal successors, (17696), 12342 states have internal predecessors, (17696), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2703 states have call predecessors, (2773), 2773 states have call successors, (2773) [2022-11-03 02:32:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15473 states to 15473 states and 23244 transitions. [2022-11-03 02:32:39,983 INFO L78 Accepts]: Start accepts. Automaton has 15473 states and 23244 transitions. Word has length 389 [2022-11-03 02:32:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:39,984 INFO L495 AbstractCegarLoop]: Abstraction has 15473 states and 23244 transitions. [2022-11-03 02:32:39,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 34.53846153846154) internal successors, (449), 15 states have internal predecessors, (449), 6 states have call successors, (81), 3 states have call predecessors, (81), 6 states have return successors, (82), 6 states have call predecessors, (82), 6 states have call successors, (82) [2022-11-03 02:32:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 15473 states and 23244 transitions. [2022-11-03 02:32:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-11-03 02:32:40,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:40,023 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:32:40,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:40,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:40,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:40,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:40,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:40,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1836471525, now seen corresponding path program 1 times [2022-11-03 02:32:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:40,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979029317] [2022-11-03 02:32:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:40,659 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:40,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:32:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:32:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-03 02:32:43,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 02:32:44,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979029317] [2022-11-03 02:32:44,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979029317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80375707] [2022-11-03 02:32:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:44,647 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:44,649 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:44,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:32:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2022-11-03 02:32:47,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:32:47,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80375707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:47,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:32:47,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 15 [2022-11-03 02:32:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702044012] [2022-11-03 02:32:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:47,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:32:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:32:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:32:47,266 INFO L87 Difference]: Start difference. First operand 15473 states and 23244 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2022-11-03 02:32:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:50,702 INFO L93 Difference]: Finished difference Result 40095 states and 60434 transitions. [2022-11-03 02:32:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:32:50,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) Word has length 396 [2022-11-03 02:32:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:50,829 INFO L225 Difference]: With dead ends: 40095 [2022-11-03 02:32:50,830 INFO L226 Difference]: Without dead ends: 32334 [2022-11-03 02:32:50,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1187 GetRequests, 1173 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:32:50,861 INFO L413 NwaCegarLoop]: 2145 mSDtfsCounter, 1953 mSDsluCounter, 3498 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:50,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1953 Valid, 5643 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:32:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32334 states. [2022-11-03 02:32:53,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32334 to 15479. [2022-11-03 02:32:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15479 states, 12205 states have (on average 1.450389184760344) internal successors, (17702), 12350 states have internal predecessors, (17702), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2701 states have call predecessors, (2773), 2773 states have call successors, (2773) [2022-11-03 02:32:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15479 states to 15479 states and 23250 transitions. [2022-11-03 02:32:53,260 INFO L78 Accepts]: Start accepts. Automaton has 15479 states and 23250 transitions. Word has length 396 [2022-11-03 02:32:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:53,261 INFO L495 AbstractCegarLoop]: Abstraction has 15479 states and 23250 transitions. [2022-11-03 02:32:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2022-11-03 02:32:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 15479 states and 23250 transitions. [2022-11-03 02:32:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-11-03 02:32:53,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:53,297 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:32:53,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:53,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:32:53,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash -722094474, now seen corresponding path program 1 times [2022-11-03 02:32:53,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:53,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692546272] [2022-11-03 02:32:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:53,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:53,730 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:53,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:32:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:56,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:32:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-03 02:32:57,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 02:32:58,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:58,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692546272] [2022-11-03 02:32:58,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692546272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:58,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252500287] [2022-11-03 02:32:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:58,341 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:58,342 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:58,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:33:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:33:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-03 02:33:04,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 02:33:04,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252500287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777846625] [2022-11-03 02:33:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:04,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:04,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:04,737 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:04,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:33:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:07,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-03 02:33:07,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 02:33:08,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777846625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:08,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:08,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 02:33:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82596078] [2022-11-03 02:33:08,783 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:08,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:33:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:33:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:33:08,788 INFO L87 Difference]: Start difference. First operand 15479 states and 23250 transitions. Second operand has 20 states, 17 states have (on average 13.294117647058824) internal successors, (226), 20 states have internal predecessors, (226), 5 states have call successors, (53), 2 states have call predecessors, (53), 7 states have return successors, (55), 5 states have call predecessors, (55), 5 states have call successors, (55) [2022-11-03 02:33:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:12,646 INFO L93 Difference]: Finished difference Result 31041 states and 46618 transitions. [2022-11-03 02:33:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:33:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 13.294117647058824) internal successors, (226), 20 states have internal predecessors, (226), 5 states have call successors, (53), 2 states have call predecessors, (53), 7 states have return successors, (55), 5 states have call predecessors, (55), 5 states have call successors, (55) Word has length 397 [2022-11-03 02:33:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:12,698 INFO L225 Difference]: With dead ends: 31041 [2022-11-03 02:33:12,698 INFO L226 Difference]: Without dead ends: 15588 [2022-11-03 02:33:12,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2381 GetRequests, 2358 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:33:12,738 INFO L413 NwaCegarLoop]: 1650 mSDtfsCounter, 36 mSDsluCounter, 16448 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18098 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:12,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 18098 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:33:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15588 states. [2022-11-03 02:33:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15588 to 15480. [2022-11-03 02:33:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15480 states, 12206 states have (on average 1.450352285761101) internal successors, (17703), 12351 states have internal predecessors, (17703), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2701 states have call predecessors, (2773), 2773 states have call successors, (2773) [2022-11-03 02:33:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15480 states to 15480 states and 23251 transitions. [2022-11-03 02:33:14,295 INFO L78 Accepts]: Start accepts. Automaton has 15480 states and 23251 transitions. Word has length 397 [2022-11-03 02:33:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:14,295 INFO L495 AbstractCegarLoop]: Abstraction has 15480 states and 23251 transitions. [2022-11-03 02:33:14,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 13.294117647058824) internal successors, (226), 20 states have internal predecessors, (226), 5 states have call successors, (53), 2 states have call predecessors, (53), 7 states have return successors, (55), 5 states have call predecessors, (55), 5 states have call successors, (55) [2022-11-03 02:33:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 15480 states and 23251 transitions. [2022-11-03 02:33:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-03 02:33:14,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:14,315 INFO L195 NwaCegarLoop]: trace histogram [21, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:33:14,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:14,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:14,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-03 02:33:14,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:14,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 664039643, now seen corresponding path program 2 times [2022-11-03 02:33:14,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:14,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47763815] [2022-11-03 02:33:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:33:14,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:14,920 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:14,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:33:30,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:33:30,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:33:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:30,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 256 proven. 6 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2022-11-03 02:33:30,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-11-03 02:33:32,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47763815] [2022-11-03 02:33:32,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47763815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982866803] [2022-11-03 02:33:32,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:33:32,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:32,358 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:32,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:35:06,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:35:06,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:35:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:35:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 256 proven. 6 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2022-11-03 02:35:07,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-11-03 02:35:08,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982866803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362510039] [2022-11-03 02:35:08,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:35:08,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:08,009 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:08,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:36:33,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:33,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:33,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 374 proven. 6 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-03 02:36:34,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 22 proven. 116 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-11-03 02:36:36,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362510039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:36,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:36,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 24 [2022-11-03 02:36:36,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425741231] [2022-11-03 02:36:36,059 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:36,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:36:36,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:36,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:36:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:36:36,062 INFO L87 Difference]: Start difference. First operand 15480 states and 23251 transitions. Second operand has 24 states, 21 states have (on average 11.047619047619047) internal successors, (232), 24 states have internal predecessors, (232), 5 states have call successors, (54), 2 states have call predecessors, (54), 8 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) [2022-11-03 02:36:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:41,794 INFO L93 Difference]: Finished difference Result 31079 states and 46668 transitions. [2022-11-03 02:36:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:36:41,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 11.047619047619047) internal successors, (232), 24 states have internal predecessors, (232), 5 states have call successors, (54), 2 states have call predecessors, (54), 8 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) Word has length 404 [2022-11-03 02:36:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:41,856 INFO L225 Difference]: With dead ends: 31079 [2022-11-03 02:36:41,857 INFO L226 Difference]: Without dead ends: 15625 [2022-11-03 02:36:41,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 2396 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:36:41,903 INFO L413 NwaCegarLoop]: 1650 mSDtfsCounter, 48 mSDsluCounter, 24652 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 26302 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:41,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 26302 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:36:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15625 states. [2022-11-03 02:36:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15625 to 15481. [2022-11-03 02:36:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15481 states, 12207 states have (on average 1.4503153928074055) internal successors, (17704), 12352 states have internal predecessors, (17704), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2701 states have call predecessors, (2773), 2773 states have call successors, (2773) [2022-11-03 02:36:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15481 states to 15481 states and 23252 transitions. [2022-11-03 02:36:44,014 INFO L78 Accepts]: Start accepts. Automaton has 15481 states and 23252 transitions. Word has length 404 [2022-11-03 02:36:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:44,015 INFO L495 AbstractCegarLoop]: Abstraction has 15481 states and 23252 transitions. [2022-11-03 02:36:44,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 11.047619047619047) internal successors, (232), 24 states have internal predecessors, (232), 5 states have call successors, (54), 2 states have call predecessors, (54), 8 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) [2022-11-03 02:36:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15481 states and 23252 transitions. [2022-11-03 02:36:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-03 02:36:44,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:44,140 INFO L195 NwaCegarLoop]: trace histogram [28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2022-11-03 02:36:44,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:44,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:44,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:44,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:44,741 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1123628758, now seen corresponding path program 3 times [2022-11-03 02:36:44,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:44,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171815947] [2022-11-03 02:36:44,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:36:44,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:44,747 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c35f90d-7217-474d-bbfc-4033b5024c3f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process