./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/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_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/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 32bit --witnessprinter.graph.data.programhash efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 --- 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 02:53:23,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:53:23,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:53:23,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:53:23,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:53:23,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:53:23,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:53:23,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:53:23,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:53:23,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:53:23,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:53:23,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:53:23,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:53:23,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:53:23,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:53:23,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:53:23,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:53:23,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:53:23,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:53:23,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:53:23,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:53:23,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:53:23,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:53:23,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:53:23,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:53:23,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:53:23,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:53:23,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:53:23,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:53:23,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:53:23,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:53:23,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:53:23,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:53:23,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:53:23,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:53:23,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:53:23,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:53:23,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:53:23,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:53:23,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:53:23,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:53:23,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:53:24,021 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:53:24,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:53:24,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:53:24,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:53:24,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:53:24,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:53:24,023 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:53:24,024 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:53:24,024 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:53:24,024 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:53:24,025 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:53:24,026 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:53:24,026 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:53:24,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:53:24,026 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:53:24,027 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:53:24,027 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:53:24,027 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:53:24,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:53:24,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:53:24,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:53:24,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:53:24,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:53:24,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:53:24,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:53:24,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:53:24,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:53:24,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:53:24,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:53:24,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:53:24,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:53:24,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:53:24,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:24,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:53:24,032 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:53:24,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:53:24,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:53:24,032 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:53:24,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:53:24,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:53:24,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:53:24,033 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_ee098900-ed8a-4844-90c5-abff77605efe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 [2022-11-03 02:53:24,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:53:24,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:53:24,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:53:24,379 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:53:24,380 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:53:24,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2022-11-03 02:53:24,470 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/51350b8ec/0bac92ccbe0c4a9ab1bd1263eb5bdc09/FLAGdcb1c1e50 [2022-11-03 02:53:25,165 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:53:25,165 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2022-11-03 02:53:25,184 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/51350b8ec/0bac92ccbe0c4a9ab1bd1263eb5bdc09/FLAGdcb1c1e50 [2022-11-03 02:53:25,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/51350b8ec/0bac92ccbe0c4a9ab1bd1263eb5bdc09 [2022-11-03 02:53:25,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:53:25,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:53:25,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:25,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:53:25,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:53:25,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:25" (1/1) ... [2022-11-03 02:53:25,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12859705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:25, skipping insertion in model container [2022-11-03 02:53:25,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:25" (1/1) ... [2022-11-03 02:53:25,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:53:25,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:53:25,876 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_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2022-11-03 02:53:26,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:26,076 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:53:26,120 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_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2022-11-03 02:53:26,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:26,287 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:53:26,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26 WrapperNode [2022-11-03 02:53:26,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:26,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:26,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:53:26,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:53:26,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,429 INFO L138 Inliner]: procedures = 177, calls = 448, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1445 [2022-11-03 02:53:26,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:26,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:53:26,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:53:26,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:53:26,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,577 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:53:26,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:53:26,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:53:26,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:53:26,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:26,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:53:26,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:53:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:53:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:53:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:53:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:53:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:53:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:53:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:53:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:53:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:53:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:53:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:53:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:53:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:53:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:53:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:53:27,030 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:53:27,032 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:53:29,705 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:53:30,253 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:53:30,254 INFO L300 CfgBuilder]: Removed 77 assume(true) statements. [2022-11-03 02:53:30,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:30 BoogieIcfgContainer [2022-11-03 02:53:30,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:53:30,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:53:30,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:53:30,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:53:30,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:53:25" (1/3) ... [2022-11-03 02:53:30,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167602eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:30, skipping insertion in model container [2022-11-03 02:53:30,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (2/3) ... [2022-11-03 02:53:30,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167602eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:30, skipping insertion in model container [2022-11-03 02:53:30,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:30" (3/3) ... [2022-11-03 02:53:30,273 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-3.i [2022-11-03 02:53:30,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:53:30,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:53:30,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:53:30,350 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;@500ef250, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:53:30,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:53:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 133 states have (on average 1.7969924812030076) internal successors, (239), 144 states have internal predecessors, (239), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:53:30,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:30,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:30,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1783625313, now seen corresponding path program 1 times [2022-11-03 02:53:30,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:30,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429561963] [2022-11-03 02:53:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:30,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429561963] [2022-11-03 02:53:30,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429561963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:30,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:30,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:53:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255752908] [2022-11-03 02:53:30,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:30,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:30,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:30,616 INFO L87 Difference]: Start difference. First operand has 153 states, 133 states have (on average 1.7969924812030076) internal successors, (239), 144 states have internal predecessors, (239), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:33,257 INFO L93 Difference]: Finished difference Result 399 states and 722 transitions. [2022-11-03 02:53:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:53:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:33,281 INFO L225 Difference]: With dead ends: 399 [2022-11-03 02:53:33,281 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:53:33,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:53:33,289 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 97 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:33,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 347 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:53:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:53:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 127. [2022-11-03 02:53:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.212962962962963) internal successors, (131), 118 states have internal predecessors, (131), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-03 02:53:33,371 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 8 [2022-11-03 02:53:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:33,372 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-03 02:53:33,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-03 02:53:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:53:33,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:33,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:33,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:53:33,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1011489585, now seen corresponding path program 1 times [2022-11-03 02:53:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:33,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134973941] [2022-11-03 02:53:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:33,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:33,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:53:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638739632] [2022-11-03 02:53:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:33,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:33,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:33,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:33,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:53:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:35,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:35,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134973941] [2022-11-03 02:53:35,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:53:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638739632] [2022-11-03 02:53:35,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638739632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014588436] [2022-11-03 02:53:35,417 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 02:53:35,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:35,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:35,427 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:35,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:35,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:35,606 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:53:35,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:53:35,664 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:53:35,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 02:53:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:35,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:35,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:35,788 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:53:35,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:53:36,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:36,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:36,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:53:36,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:53:36,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:36,329 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:53:36,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 02:53:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:36,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:36,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:36,376 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:53:36,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:53:36,426 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:53:36,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:53:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:36,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:37,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:37,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:37,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:53:37,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:53:37,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:37,601 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:38,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2014588436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:38,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:53:38,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 02:53:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056259693] [2022-11-03 02:53:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:38,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:53:38,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:53:38,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:53:38,506 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:45,896 INFO L93 Difference]: Finished difference Result 271 states and 347 transitions. [2022-11-03 02:53:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:53:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:53:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:45,898 INFO L225 Difference]: With dead ends: 271 [2022-11-03 02:53:45,898 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:53:45,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:53:45,900 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 12 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:45,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 558 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 02:53:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:53:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-11-03 02:53:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 118 states have (on average 1.194915254237288) internal successors, (141), 128 states have internal predecessors, (141), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-11-03 02:53:45,920 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 52 [2022-11-03 02:53:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:45,921 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-11-03 02:53:45,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-11-03 02:53:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:53:45,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:45,924 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:53:45,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:46,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1235485580, now seen corresponding path program 1 times [2022-11-03 02:53:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:46,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302290243] [2022-11-03 02:53:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:46,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:53:46,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603607847] [2022-11-03 02:53:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:46,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:46,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:46,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:53:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:53:47,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:53:47,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302290243] [2022-11-03 02:53:47,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:53:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603607847] [2022-11-03 02:53:47,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603607847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:47,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376774530] [2022-11-03 02:53:47,735 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 02:53:47,735 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:47,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:47,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:47,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:47,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:47,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:47,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:47,978 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:53:47,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 02:53:47,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,019 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:53:48,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:53:48,074 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:53:48,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:53:48,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:48,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:53:48,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:53:48,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:48,386 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 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:53:48,395 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:53:48,396 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 38 treesize of output 25 [2022-11-03 02:53:48,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:53:48,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:53:48,453 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 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:53:48,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:53:48,491 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 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:53:48,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:53:48,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:53:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,649 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:53:48,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:53:48,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:48,712 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:53:48,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:53:48,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:53:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:53:49,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:49,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:53:49,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:53:49,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:53:49,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:53:49,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:53:49,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:53:49,182 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 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:53:49,204 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 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:53:49,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:53:49,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:53:49,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:53:49,383 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 02:53:49,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:50,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1376774530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:50,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:53:50,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 02:53:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177059422] [2022-11-03 02:53:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:53:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:53:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:53:50,811 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:53:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:58,231 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2022-11-03 02:53:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:53:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-11-03 02:53:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:58,233 INFO L225 Difference]: With dead ends: 273 [2022-11-03 02:53:58,233 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 02:53:58,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:53:58,234 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 15 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:58,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 634 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 235 Invalid, 0 Unknown, 88 Unchecked, 5.7s Time] [2022-11-03 02:53:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 02:53:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-11-03 02:53:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 132 states have internal predecessors, (145), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:53:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-03 02:53:58,256 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 65 [2022-11-03 02:53:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:58,256 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-03 02:53:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:53:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-03 02:53:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:53:58,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:58,259 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:53:58,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:53:58,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:58,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -662703022, now seen corresponding path program 1 times [2022-11-03 02:53:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:58,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933813818] [2022-11-03 02:53:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:58,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:53:58,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869190379] [2022-11-03 02:53:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:58,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:58,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:58,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:53:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:53:59,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:54:00,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933813818] [2022-11-03 02:54:00,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:54:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869190379] [2022-11-03 02:54:00,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869190379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190899690] [2022-11-03 02:54:00,176 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 02:54:00,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:54:00,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:54:00,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:54:00,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:54:00,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:00,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:54:00,337 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:54:00,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 02:54:00,378 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:54:00,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:54:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:00,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:54:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:00,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:00,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:54:00,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:54:00,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:54:00,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:54:00,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:54:00,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:54:00,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:54:00,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:54:00,775 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 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:54:00,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:54:00,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:54:00,808 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 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:54:00,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:54:00,872 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 13 treesize of output 9 [2022-11-03 02:54:00,876 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 11 treesize of output 7 [2022-11-03 02:54:00,882 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 11 treesize of output 7 [2022-11-03 02:54:00,930 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:54:00,931 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 51 treesize of output 54 [2022-11-03 02:54:00,967 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 02:54:00,968 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 49 treesize of output 52 [2022-11-03 02:54:00,997 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:54:00,998 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 43 treesize of output 46 [2022-11-03 02:54:01,033 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 14 treesize of output 10 [2022-11-03 02:54:01,039 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 16 treesize of output 12 [2022-11-03 02:54:01,045 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 14 treesize of output 10 [2022-11-03 02:54:01,090 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:54:01,105 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:54:01,124 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:54:01,196 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:54:01,215 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:54:01,230 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:54:13,673 WARN L234 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 67 DAG size of output: 32 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:54:13,673 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 02:54:13,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:13,875 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_664| input size 140 context size 140 output size 140 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) 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) [2022-11-03 02:54:13,878 INFO L158 Benchmark]: Toolchain (without parser) took 48502.30ms. Allocated memory was 100.7MB in the beginning and 274.7MB in the end (delta: 174.1MB). Free memory was 64.7MB in the beginning and 53.3MB in the end (delta: 11.4MB). Peak memory consumption was 185.2MB. Max. memory is 16.1GB. [2022-11-03 02:54:13,879 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 77.6MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:54:13,879 INFO L158 Benchmark]: CACSL2BoogieTranslator took 909.95ms. Allocated memory is still 100.7MB. Free memory was 64.5MB in the beginning and 48.2MB in the end (delta: 16.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:54:13,879 INFO L158 Benchmark]: Boogie Procedure Inliner took 140.81ms. Allocated memory is still 100.7MB. Free memory was 48.2MB in the beginning and 37.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:54:13,879 INFO L158 Benchmark]: Boogie Preprocessor took 184.99ms. Allocated memory is still 100.7MB. Free memory was 37.7MB in the beginning and 63.8MB in the end (delta: -26.1MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2022-11-03 02:54:13,880 INFO L158 Benchmark]: RCFGBuilder took 3641.60ms. Allocated memory was 100.7MB in the beginning and 134.2MB in the end (delta: 33.6MB). Free memory was 63.3MB in the beginning and 65.2MB in the end (delta: -2.0MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2022-11-03 02:54:13,880 INFO L158 Benchmark]: TraceAbstraction took 43618.68ms. Allocated memory was 134.2MB in the beginning and 274.7MB in the end (delta: 140.5MB). Free memory was 64.2MB in the beginning and 53.3MB in the end (delta: 10.9MB). Peak memory consumption was 152.0MB. Max. memory is 16.1GB. [2022-11-03 02:54:13,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 77.6MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 909.95ms. Allocated memory is still 100.7MB. Free memory was 64.5MB in the beginning and 48.2MB in the end (delta: 16.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 140.81ms. Allocated memory is still 100.7MB. Free memory was 48.2MB in the beginning and 37.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 184.99ms. Allocated memory is still 100.7MB. Free memory was 37.7MB in the beginning and 63.8MB in the end (delta: -26.1MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * RCFGBuilder took 3641.60ms. Allocated memory was 100.7MB in the beginning and 134.2MB in the end (delta: 33.6MB). Free memory was 63.3MB in the beginning and 65.2MB in the end (delta: -2.0MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. * TraceAbstraction took 43618.68ms. Allocated memory was 134.2MB in the beginning and 274.7MB in the end (delta: 140.5MB). Free memory was 64.2MB in the beginning and 53.3MB in the end (delta: 10.9MB). Peak memory consumption was 152.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_664| input size 140 context size 140 output size 140 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_664| input size 140 context size 140 output size 140: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:54:13,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/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_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/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 32bit --witnessprinter.graph.data.programhash efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 --- 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 02:54:16,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:54:16,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:54:16,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:54:16,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:54:16,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:54:16,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:54:16,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:54:16,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:54:16,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:54:16,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:54:16,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:54:16,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:54:16,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:54:16,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:54:16,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:54:16,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:54:16,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:54:16,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:54:16,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:54:16,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:54:16,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:54:16,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:54:16,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:54:16,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:54:16,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:54:16,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:54:16,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:54:16,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:54:16,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:54:16,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:54:16,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:54:16,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:54:16,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:54:16,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:54:16,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:54:16,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:54:16,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:54:16,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:54:16,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:54:16,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:54:16,445 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:54:16,492 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:54:16,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:54:16,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:54:16,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:54:16,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:54:16,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:54:16,500 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:54:16,500 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:54:16,500 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:54:16,501 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:54:16,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:54:16,501 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:54:16,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:54:16,502 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:54:16,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:54:16,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:54:16,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:54:16,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:54:16,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:54:16,504 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:54:16,504 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:54:16,505 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:54:16,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:54:16,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:54:16,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:54:16,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:54:16,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:54:16,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:54:16,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:54:16,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:54:16,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:54:16,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:54:16,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:54:16,508 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:54:16,508 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:16,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:54:16,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:54:16,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:54:16,509 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_ee098900-ed8a-4844-90c5-abff77605efe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 [2022-11-03 02:54:16,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:54:16,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:54:16,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:54:16,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:54:16,895 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:54:16,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2022-11-03 02:54:16,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/1c5d2422c/9280297b7e754cdfb2853a0b377f9a8a/FLAG7e6d96299 [2022-11-03 02:54:17,744 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:54:17,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2022-11-03 02:54:17,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/1c5d2422c/9280297b7e754cdfb2853a0b377f9a8a/FLAG7e6d96299 [2022-11-03 02:54:17,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/data/1c5d2422c/9280297b7e754cdfb2853a0b377f9a8a [2022-11-03 02:54:17,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:54:17,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:54:17,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:54:17,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:54:17,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:54:17,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:54:17" (1/1) ... [2022-11-03 02:54:17,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af79c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:17, skipping insertion in model container [2022-11-03 02:54:17,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:54:17" (1/1) ... [2022-11-03 02:54:17,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:54:18,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:54:18,524 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_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2022-11-03 02:54:18,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:54:18,765 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:54:18,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:54:18,795 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_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2022-11-03 02:54:18,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:54:18,875 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:54:18,899 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_ee098900-ed8a-4844-90c5-abff77605efe/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2022-11-03 02:54:18,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:54:19,009 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:54:19,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19 WrapperNode [2022-11-03 02:54:19,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:54:19,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:54:19,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:54:19,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:54:19,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,195 INFO L138 Inliner]: procedures = 180, calls = 448, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1446 [2022-11-03 02:54:19,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:54:19,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:54:19,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:54:19,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:54:19,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,314 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:54:19,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:54:19,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:54:19,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:54:19,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (1/1) ... [2022-11-03 02:54:19,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:54:19,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:19,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:54:19,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:54:19,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:54:19,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:54:19,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:54:19,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:54:19,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:54:19,439 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:54:19,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:54:19,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:54:19,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:54:19,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:54:19,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:54:19,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:54:19,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:54:19,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:54:19,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:54:19,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:54:19,713 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:54:19,715 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:54:31,123 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:54:31,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:54:31,133 INFO L300 CfgBuilder]: Removed 77 assume(true) statements. [2022-11-03 02:54:31,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:54:31 BoogieIcfgContainer [2022-11-03 02:54:31,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:54:31,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:54:31,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:54:31,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:54:31,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:54:17" (1/3) ... [2022-11-03 02:54:31,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d42bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:54:31, skipping insertion in model container [2022-11-03 02:54:31,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:54:19" (2/3) ... [2022-11-03 02:54:31,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d42bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:54:31, skipping insertion in model container [2022-11-03 02:54:31,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:54:31" (3/3) ... [2022-11-03 02:54:31,146 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-3.i [2022-11-03 02:54:31,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:54:31,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:54:31,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:54:31,265 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;@1a27f2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:54:31,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:54:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:54:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:54:31,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:31,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:31,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1523630084, now seen corresponding path program 1 times [2022-11-03 02:54:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:31,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250562683] [2022-11-03 02:54:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:31,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:31,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:31,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:31,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:54:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:54:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:31,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:31,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250562683] [2022-11-03 02:54:31,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250562683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:31,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:31,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:54:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726681000] [2022-11-03 02:54:31,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:31,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:54:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:54:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:31,708 INFO L87 Difference]: Start difference. First operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:32,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:32,064 INFO L93 Difference]: Finished difference Result 690 states and 1177 transitions. [2022-11-03 02:54:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:54:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:54:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:32,087 INFO L225 Difference]: With dead ends: 690 [2022-11-03 02:54:32,087 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 02:54:32,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 02:54:32,095 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 211 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:32,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 771 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:54:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 02:54:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-11-03 02:54:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:54:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-11-03 02:54:32,158 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-11-03 02:54:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:32,159 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-11-03 02:54:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-11-03 02:54:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:54:32,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:32,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:32,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:32,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:32,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1954115269, now seen corresponding path program 1 times [2022-11-03 02:54:32,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:32,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973622135] [2022-11-03 02:54:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:32,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:32,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:54:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:54:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:34,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:34,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973622135] [2022-11-03 02:54:34,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973622135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:34,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:34,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:54:34,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428843068] [2022-11-03 02:54:34,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:34,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:54:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:54:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:54:34,676 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:34,843 INFO L93 Difference]: Finished difference Result 422 states and 573 transitions. [2022-11-03 02:54:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:54:34,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 02:54:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:34,846 INFO L225 Difference]: With dead ends: 422 [2022-11-03 02:54:34,846 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 02:54:34,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 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 02:54:34,849 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:34,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 02:54:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2022-11-03 02:54:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 202 states have internal predecessors, (245), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:54:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-11-03 02:54:34,871 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 108 [2022-11-03 02:54:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:34,872 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-11-03 02:54:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-11-03 02:54:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:54:34,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:34,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:34,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:35,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:35,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2113724743, now seen corresponding path program 1 times [2022-11-03 02:54:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:35,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923863477] [2022-11-03 02:54:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:35,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:35,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:35,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:54:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:54:37,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:37,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:37,719 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923863477] [2022-11-03 02:54:37,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923863477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:37,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:37,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:54:37,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684112572] [2022-11-03 02:54:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:54:37,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:54:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:37,723 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:38,306 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2022-11-03 02:54:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:54:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 02:54:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:38,319 INFO L225 Difference]: With dead ends: 460 [2022-11-03 02:54:38,319 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 02:54:38,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 02:54:38,323 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:38,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:54:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 02:54:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-11-03 02:54:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 233 states have (on average 1.2446351931330473) internal successors, (290), 243 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:54:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2022-11-03 02:54:38,345 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 108 [2022-11-03 02:54:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:38,346 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2022-11-03 02:54:38,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2022-11-03 02:54:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:54:38,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:38,349 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:54:38,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 02:54:38,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:38,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 471726362, now seen corresponding path program 1 times [2022-11-03 02:54:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179706333] [2022-11-03 02:54:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:38,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:38,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:54:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:54:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:40,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:40,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:40,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179706333] [2022-11-03 02:54:40,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179706333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:40,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:40,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:54:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158024036] [2022-11-03 02:54:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:54:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:54:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:54:40,439 INFO L87 Difference]: Start difference. First operand 252 states and 322 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:54:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:40,547 INFO L93 Difference]: Finished difference Result 463 states and 605 transitions. [2022-11-03 02:54:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:54:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-11-03 02:54:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:40,550 INFO L225 Difference]: With dead ends: 463 [2022-11-03 02:54:40,550 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 02:54:40,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 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 02:54:40,552 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:40,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 02:54:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-03 02:54:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 235 states have (on average 1.2468085106382978) internal successors, (293), 246 states have internal predecessors, (293), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 02:54:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 327 transitions. [2022-11-03 02:54:40,585 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 327 transitions. Word has length 123 [2022-11-03 02:54:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:40,586 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 327 transitions. [2022-11-03 02:54:40,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:54:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 327 transitions. [2022-11-03 02:54:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:54:40,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:40,589 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:54:40,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:40,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:40,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1171066620, now seen corresponding path program 1 times [2022-11-03 02:54:40,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:40,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158395694] [2022-11-03 02:54:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:40,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:40,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:54:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:42,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:54:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:42,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:54:43,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158395694] [2022-11-03 02:54:43,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158395694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1403908058] [2022-11-03 02:54:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:43,011 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:43,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:43,018 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:43,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:54:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:45,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:54:45,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:54:45,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:45,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1403908058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:45,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:54:45,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:54:45,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860962151] [2022-11-03 02:54:45,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:45,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:45,192 INFO L87 Difference]: Start difference. First operand 255 states and 327 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:54:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:45,349 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions. [2022-11-03 02:54:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:54:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 02:54:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:45,352 INFO L225 Difference]: With dead ends: 524 [2022-11-03 02:54:45,352 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 02:54:45,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:45,354 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 216 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:45,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 744 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 02:54:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2022-11-03 02:54:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 255 states have internal predecessors, (297), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 02:54:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-11-03 02:54:45,406 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 125 [2022-11-03 02:54:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:45,407 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-11-03 02:54:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:54:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-11-03 02:54:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:54:45,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:45,410 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:54:45,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:45,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-03 02:54:45,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:45,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1243453178, now seen corresponding path program 1 times [2022-11-03 02:54:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:45,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332877532] [2022-11-03 02:54:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:45,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:45,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:54:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:54:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:47,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:54:47,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:47,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332877532] [2022-11-03 02:54:47,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332877532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:47,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335495616] [2022-11-03 02:54:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:47,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:47,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:54:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:54:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:54:50,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:50,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1335495616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:50,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:54:50,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:54:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638582895] [2022-11-03 02:54:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:50,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:54:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:54:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:50,812 INFO L87 Difference]: Start difference. First operand 264 states and 331 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:54:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:51,226 INFO L93 Difference]: Finished difference Result 574 states and 727 transitions. [2022-11-03 02:54:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:54:51,236 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 02:54:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:51,238 INFO L225 Difference]: With dead ends: 574 [2022-11-03 02:54:51,238 INFO L226 Difference]: Without dead ends: 354 [2022-11-03 02:54:51,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:51,240 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:51,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:54:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-03 02:54:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-03 02:54:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 331 states have (on average 1.2145015105740182) internal successors, (402), 342 states have internal predecessors, (402), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 02:54:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 443 transitions. [2022-11-03 02:54:51,261 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 443 transitions. Word has length 125 [2022-11-03 02:54:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:51,262 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 443 transitions. [2022-11-03 02:54:51,262 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:54:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 443 transitions. [2022-11-03 02:54:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:54:51,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:51,266 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:51,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:51,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:51,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash -259988197, now seen corresponding path program 1 times [2022-11-03 02:54:51,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:51,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343522060] [2022-11-03 02:54:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:51,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:51,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:51,684 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:51,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:54:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:53,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:54:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:54:53,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:54:53,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343522060] [2022-11-03 02:54:53,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343522060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715623497] [2022-11-03 02:54:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:53,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:53,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:53,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:54:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:54:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:54:55,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715623497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:55,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:54:55,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:54:55,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495937903] [2022-11-03 02:54:55,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:55,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:55,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:55,884 INFO L87 Difference]: Start difference. First operand 354 states and 443 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:54:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:56,021 INFO L93 Difference]: Finished difference Result 577 states and 729 transitions. [2022-11-03 02:54:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:54:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-11-03 02:54:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:56,025 INFO L225 Difference]: With dead ends: 577 [2022-11-03 02:54:56,025 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 02:54:56,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:56,028 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 215 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:56,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 797 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 02:54:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-11-03 02:54:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 307 states have (on average 1.1856677524429968) internal successors, (364), 318 states have internal predecessors, (364), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 02:54:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 405 transitions. [2022-11-03 02:54:56,053 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 405 transitions. Word has length 142 [2022-11-03 02:54:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:56,054 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 405 transitions. [2022-11-03 02:54:56,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:54:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 405 transitions. [2022-11-03 02:54:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:54:56,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:56,058 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:56,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:56,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:56,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:56,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:56,477 INFO L85 PathProgramCache]: Analyzing trace with hash 309151503, now seen corresponding path program 1 times [2022-11-03 02:54:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:56,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219800026] [2022-11-03 02:54:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:56,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:56,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:56,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:54:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:54:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:54:58,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:54:58,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219800026] [2022-11-03 02:54:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219800026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1478862132] [2022-11-03 02:54:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:58,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:58,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:55:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:55:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:55:01,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:55:01,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1478862132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334034057] [2022-11-03 02:55:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:01,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:01,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:55:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:55:03,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:55:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:55:04,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334034057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:04,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:04,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 02:55:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487604464] [2022-11-03 02:55:04,330 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:55:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:55:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:55:04,332 INFO L87 Difference]: Start difference. First operand 330 states and 405 transitions. Second operand has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:55:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:06,399 INFO L93 Difference]: Finished difference Result 1011 states and 1282 transitions. [2022-11-03 02:55:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:55:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 142 [2022-11-03 02:55:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:06,405 INFO L225 Difference]: With dead ends: 1011 [2022-11-03 02:55:06,405 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 02:55:06,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:55:06,407 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 791 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:06,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 3631 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:55:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 02:55:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2022-11-03 02:55:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 687 states have (on average 1.1892285298398835) internal successors, (817), 698 states have internal predecessors, (817), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 02:55:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 893 transitions. [2022-11-03 02:55:06,484 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 893 transitions. Word has length 142 [2022-11-03 02:55:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:06,485 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 893 transitions. [2022-11-03 02:55:06,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:55:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 893 transitions. [2022-11-03 02:55:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-11-03 02:55:06,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:06,495 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:06,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:06,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:06,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:07,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:07,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:07,110 INFO L85 PathProgramCache]: Analyzing trace with hash -905024088, now seen corresponding path program 1 times [2022-11-03 02:55:07,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:07,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277850362] [2022-11-03 02:55:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:07,112 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:07,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:55:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:55:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:55:16,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:55:17,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277850362] [2022-11-03 02:55:17,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277850362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306196563] [2022-11-03 02:55:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:17,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:17,280 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:17,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:55:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:55:28,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:55:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:55:28,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1306196563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:28,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139138917] [2022-11-03 02:55:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:28,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:28,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:28,292 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:28,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:55:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:55:37,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 202 proven. 3 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-03 02:55:37,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 02:55:37,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139138917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:37,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:37,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 02:55:37,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634130467] [2022-11-03 02:55:37,785 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:55:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:55:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:55:37,788 INFO L87 Difference]: Start difference. First operand 726 states and 893 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:55:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:39,391 INFO L93 Difference]: Finished difference Result 1431 states and 1853 transitions. [2022-11-03 02:55:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:55:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 444 [2022-11-03 02:55:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:39,397 INFO L225 Difference]: With dead ends: 1431 [2022-11-03 02:55:39,397 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 02:55:39,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2683 GetRequests, 2640 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:55:39,400 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 149 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 2446 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:55:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 02:55:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 738. [2022-11-03 02:55:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 699 states have (on average 1.1917024320457796) internal successors, (833), 710 states have internal predecessors, (833), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 02:55:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 909 transitions. [2022-11-03 02:55:39,535 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 909 transitions. Word has length 444 [2022-11-03 02:55:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:39,536 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 909 transitions. [2022-11-03 02:55:39,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:55:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 909 transitions. [2022-11-03 02:55:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-03 02:55:39,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:39,547 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:39,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-03 02:55:39,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:40,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:40,176 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1092913320, now seen corresponding path program 2 times [2022-11-03 02:55:40,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:40,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719261414] [2022-11-03 02:55:40,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:55:40,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:40,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:40,180 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:40,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:55:50,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:50,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:55:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:55:51,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:55:51,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719261414] [2022-11-03 02:55:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719261414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501521681] [2022-11-03 02:55:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:55:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:51,972 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:51,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:56:04,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:56:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:56:04,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:56:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:56:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:56:05,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501521681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000751991] [2022-11-03 02:56:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:56:05,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:56:05,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:56:05,308 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:56:05,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:56:15,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:56:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:56:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:56:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:56:16,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:56:18,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000751991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:18,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:56:18,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 02:56:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658527783] [2022-11-03 02:56:18,411 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:56:18,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:56:18,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:56:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:56:18,415 INFO L87 Difference]: Start difference. First operand 738 states and 909 transitions. Second operand has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:56:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:38,465 INFO L93 Difference]: Finished difference Result 2486 states and 3329 transitions. [2022-11-03 02:56:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:56:38,466 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 468 [2022-11-03 02:56:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:38,474 INFO L225 Difference]: With dead ends: 2486 [2022-11-03 02:56:38,474 INFO L226 Difference]: Without dead ends: 1791 [2022-11-03 02:56:38,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2841 GetRequests, 2772 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:56:38,479 INFO L413 NwaCegarLoop]: 1053 mSDtfsCounter, 2974 mSDsluCounter, 17578 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 1018 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3126 SdHoareTripleChecker+Valid, 18631 SdHoareTripleChecker+Invalid, 5791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:38,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3126 Valid, 18631 Invalid, 5791 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1018 Valid, 4773 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-11-03 02:56:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-11-03 02:56:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1773. [2022-11-03 02:56:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1698 states have (on average 1.17962308598351) internal successors, (2003), 1709 states have internal predecessors, (2003), 70 states have call successors, (70), 3 states have call predecessors, (70), 4 states have return successors, (90), 61 states have call predecessors, (90), 70 states have call successors, (90) [2022-11-03 02:56:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2163 transitions. [2022-11-03 02:56:38,625 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2163 transitions. Word has length 468 [2022-11-03 02:56:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:38,626 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2163 transitions. [2022-11-03 02:56:38,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:56:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2163 transitions. [2022-11-03 02:56:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2022-11-03 02:56:38,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:38,652 INFO L195 NwaCegarLoop]: trace histogram [66, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:56:38,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:38,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:39,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-03 02:56:39,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:39,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:39,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1157686768, now seen corresponding path program 3 times [2022-11-03 02:56:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850616026] [2022-11-03 02:56:39,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:56:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:39,279 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:39,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee098900-ed8a-4844-90c5-abff77605efe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process