./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina3.c --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_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/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_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/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_b91a725d-a055-48f2-bf10-6a1e7c820e80/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 2aebf3cfbf85ca5d76e40b9ce94a108ab82985532ad1ea09b88a009b3e11ff5a --- 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 01:40:02,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:02,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:03,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:03,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:03,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:03,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:03,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:03,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:03,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:03,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:03,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:03,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:03,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:03,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:03,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:03,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:03,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:03,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:03,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:03,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:03,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:03,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:03,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:03,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:03,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:03,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:03,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:03,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:03,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:03,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:03,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:03,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:03,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:03,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:03,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:03,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:03,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:03,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:03,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:03,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:03,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:40:03,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:03,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:03,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:03,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:03,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:03,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:03,100 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:03,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:03,101 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:03,101 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:03,102 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:03,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:03,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:03,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:03,103 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:03,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:03,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:03,104 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:03,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:03,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:03,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:03,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:03,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:03,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:40:03,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:03,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:40:03,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:03,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:40:03,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:03,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:40:03,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:03,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:03,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:03,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:03,109 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:03,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:03,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:40:03,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:03,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:03,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:40:03,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:03,111 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_b91a725d-a055-48f2-bf10-6a1e7c820e80/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2aebf3cfbf85ca5d76e40b9ce94a108ab82985532ad1ea09b88a009b3e11ff5a [2022-11-03 01:40:03,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:03,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:03,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:03,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:03,465 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:03,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/sina3.c [2022-11-03 01:40:03,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/data/ed828b6d9/4528b734bf86427f8059c4e3a3dd4b40/FLAG532bbc300 [2022-11-03 01:40:04,099 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:04,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/sv-benchmarks/c/array-fpi/sina3.c [2022-11-03 01:40:04,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/data/ed828b6d9/4528b734bf86427f8059c4e3a3dd4b40/FLAG532bbc300 [2022-11-03 01:40:04,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/data/ed828b6d9/4528b734bf86427f8059c4e3a3dd4b40 [2022-11-03 01:40:04,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:04,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:04,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:04,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:04,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:04,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125bad47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04, skipping insertion in model container [2022-11-03 01:40:04,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:04,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:40:04,788 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_b91a725d-a055-48f2-bf10-6a1e7c820e80/sv-benchmarks/c/array-fpi/sina3.c[588,601] [2022-11-03 01:40:04,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:04,835 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:40:04,861 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_b91a725d-a055-48f2-bf10-6a1e7c820e80/sv-benchmarks/c/array-fpi/sina3.c[588,601] [2022-11-03 01:40:04,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:04,899 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:40:04,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04 WrapperNode [2022-11-03 01:40:04,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:04,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:04,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:40:04,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:40:04,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,941 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2022-11-03 01:40:04,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:04,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:40:04,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:40:04,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:40:04,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,968 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:40:04,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:40:04,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:40:04,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:40:04,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (1/1) ... [2022-11-03 01:40:04,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:05,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:05,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:40:05,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:40:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:40:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:40:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:40:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:40:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:40:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:40:05,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:40:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:40:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:40:05,133 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:40:05,135 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:40:05,432 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:40:05,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:40:05,499 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-03 01:40:05,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:05 BoogieIcfgContainer [2022-11-03 01:40:05,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:40:05,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:40:05,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:40:05,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:40:05,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:04" (1/3) ... [2022-11-03 01:40:05,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4c540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:05, skipping insertion in model container [2022-11-03 01:40:05,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:04" (2/3) ... [2022-11-03 01:40:05,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4c540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:05, skipping insertion in model container [2022-11-03 01:40:05,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:05" (3/3) ... [2022-11-03 01:40:05,510 INFO L112 eAbstractionObserver]: Analyzing ICFG sina3.c [2022-11-03 01:40:05,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:40:05,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:40:05,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:05,632 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;@7bc58318, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:05,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:40:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:40:05,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:05,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:05,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash -155408202, now seen corresponding path program 1 times [2022-11-03 01:40:05,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:05,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304115223] [2022-11-03 01:40:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:05,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:06,216 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 01:40:06,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:06,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304115223] [2022-11-03 01:40:06,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304115223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:06,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:06,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:06,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973861111] [2022-11-03 01:40:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:06,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:06,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:06,271 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:06,379 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-03 01:40:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:40:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:06,394 INFO L225 Difference]: With dead ends: 24 [2022-11-03 01:40:06,394 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 01:40:06,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:06,406 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:06,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 01:40:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 01:40:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-03 01:40:06,460 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2022-11-03 01:40:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:06,460 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-03 01:40:06,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-03 01:40:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:40:06,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:06,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:40:06,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1655315069, now seen corresponding path program 1 times [2022-11-03 01:40:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:06,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11391360] [2022-11-03 01:40:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:06,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11391360] [2022-11-03 01:40:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11391360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:06,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:06,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:40:06,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289562958] [2022-11-03 01:40:06,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:06,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:06,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:06,697 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:06,757 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-11-03 01:40:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:40:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:06,761 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:40:06,761 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:40:06,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:06,766 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:06,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:40:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-03 01:40:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-03 01:40:06,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-03 01:40:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:06,773 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-03 01:40:06,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-03 01:40:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:40:06,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:06,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:06,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:40:06,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash -165518152, now seen corresponding path program 1 times [2022-11-03 01:40:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:06,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518769469] [2022-11-03 01:40:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:06,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:08,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518769469] [2022-11-03 01:40:08,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518769469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512059727] [2022-11-03 01:40:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:08,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:08,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:40:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:40:08,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:08,830 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 01:40:08,856 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:40:08,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:40:08,924 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 19 treesize of output 18 [2022-11-03 01:40:09,014 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 26 treesize of output 28 [2022-11-03 01:40:09,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-11-03 01:40:09,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-03 01:40:09,734 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:40:09,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 38 [2022-11-03 01:40:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:09,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:10,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512059727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779427562] [2022-11-03 01:40:10,379 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:40:10,379 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:10,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:10,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:10,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,676 INFO L356 Elim1Store]: treesize reduction 142, result has 27.2 percent of original size [2022-11-03 01:40:10,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 76 [2022-11-03 01:40:10,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,890 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:40:10,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:40:10,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,925 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 26 treesize of output 28 [2022-11-03 01:40:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:10,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:40:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:11,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,299 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:40:11,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:40:11,477 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 01:40:11,505 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 01:40:11,567 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 68 treesize of output 67 [2022-11-03 01:40:11,626 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 01:40:11,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:11,679 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:40:11,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:40:11,793 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:40:11,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:40:11,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:11,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:11,927 INFO L356 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-03 01:40:11,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-11-03 01:40:12,058 INFO L356 Elim1Store]: treesize reduction 53, result has 55.5 percent of original size [2022-11-03 01:40:12,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 80 [2022-11-03 01:40:12,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:12,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem16#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:12,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:12,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:12,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-03 01:40:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263338160] [2022-11-03 01:40:12,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:12,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 01:40:12,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 01:40:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:40:12,813 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:15,336 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-11-03 01:40:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:40:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:40:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:15,339 INFO L225 Difference]: With dead ends: 31 [2022-11-03 01:40:15,339 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:40:15,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:40:15,341 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:15,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 195 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-11-03 01:40:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:40:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-03 01:40:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-11-03 01:40:15,362 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2022-11-03 01:40:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:15,363 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-11-03 01:40:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-03 01:40:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:40:15,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:15,365 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:15,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:40:15,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:15,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1789139528, now seen corresponding path program 2 times [2022-11-03 01:40:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798098878] [2022-11-03 01:40:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:15,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:15,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798098878] [2022-11-03 01:40:15,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798098878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697562317] [2022-11-03 01:40:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:40:15,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:15,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:15,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:40:15,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:40:15,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:40:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:15,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:15,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697562317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:15,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391550814] [2022-11-03 01:40:15,945 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:40:15,945 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:15,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:15,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:15,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:15,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:15,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,160 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:40:16,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:40:16,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 19 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:40:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,238 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 26 treesize of output 28 [2022-11-03 01:40:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:40:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:16,523 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:40:16,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:40:16,631 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 01:40:16,654 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 01:40:16,700 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:40:16,701 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 66 treesize of output 71 [2022-11-03 01:40:16,748 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 01:40:16,795 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:40:16,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:40:16,907 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:40:16,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:40:16,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:17,004 INFO L356 Elim1Store]: treesize reduction 33, result has 52.2 percent of original size [2022-11-03 01:40:17,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 50 [2022-11-03 01:40:17,139 INFO L356 Elim1Store]: treesize reduction 53, result has 55.5 percent of original size [2022-11-03 01:40:17,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 80 [2022-11-03 01:40:17,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:17,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '434#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem16#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:17,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:17,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:17,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:40:17,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695042462] [2022-11-03 01:40:17,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:17,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:40:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:40:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:40:17,672 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:17,838 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-11-03 01:40:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:40:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 01:40:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:17,840 INFO L225 Difference]: With dead ends: 63 [2022-11-03 01:40:17,840 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:40:17,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:40:17,841 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:17,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:40:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-11-03 01:40:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-03 01:40:17,849 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2022-11-03 01:40:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:17,849 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-03 01:40:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-03 01:40:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:40:17,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:17,866 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:17,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 01:40:18,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:18,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash -421291265, now seen corresponding path program 3 times [2022-11-03 01:40:18,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:18,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950023028] [2022-11-03 01:40:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:18,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950023028] [2022-11-03 01:40:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950023028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195147090] [2022-11-03 01:40:18,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:40:18,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:18,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:18,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:40:18,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:40:18,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:40:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:18,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:18,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195147090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:18,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153824372] [2022-11-03 01:40:18,434 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:40:18,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:18,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:18,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:18,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,657 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:40:18,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:40:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,685 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 26 treesize of output 28 [2022-11-03 01:40:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 19 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:40:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:40:18,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:18,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:19,003 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:40:19,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:40:19,117 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 01:40:19,135 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 01:40:19,189 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:40:19,189 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 66 treesize of output 71 [2022-11-03 01:40:19,229 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 01:40:19,270 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:40:19,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:40:19,361 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:40:19,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:40:19,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:19,482 INFO L356 Elim1Store]: treesize reduction 33, result has 52.2 percent of original size [2022-11-03 01:40:19,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 50 [2022-11-03 01:40:19,667 INFO L356 Elim1Store]: treesize reduction 53, result has 55.5 percent of original size [2022-11-03 01:40:19,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 80 [2022-11-03 01:40:19,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:20,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem16#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:20,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:20,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:20,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:40:20,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973016284] [2022-11-03 01:40:20,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:20,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:40:20,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:40:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:40:20,145 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:20,330 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-03 01:40:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:40:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 01:40:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:20,332 INFO L225 Difference]: With dead ends: 37 [2022-11-03 01:40:20,332 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:40:20,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:40:20,333 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:20,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:40:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-03 01:40:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-03 01:40:20,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-11-03 01:40:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:20,339 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-03 01:40:20,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-03 01:40:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:40:20,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:20,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:20,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:20,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:20,541 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1101372854, now seen corresponding path program 4 times [2022-11-03 01:40:20,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:20,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136708593] [2022-11-03 01:40:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:20,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:22,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136708593] [2022-11-03 01:40:22,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136708593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742813686] [2022-11-03 01:40:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:40:22,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:22,458 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:22,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:40:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:22,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 01:40:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:22,585 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 01:40:22,595 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:40:22,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:40:22,622 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 24 treesize of output 23 [2022-11-03 01:40:22,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:22,678 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 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-03 01:40:22,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:40:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:22,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 01:40:23,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-11-03 01:40:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:23,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:23,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-03 01:40:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:23,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-03 01:40:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:23,449 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-11-03 01:40:23,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 46 treesize of output 60 [2022-11-03 01:40:23,629 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:40:23,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 34 [2022-11-03 01:40:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:23,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:40,210 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int) (v_ArrVal_233 Int) (|v_ULTIMATE.start_main_~i~0#1_161| Int) (v_ArrVal_226 Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_157|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_161|)) (= (select (store (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (+ (* |v_ULTIMATE.start_main_~i~0#1_161| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_226)))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse0 (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse3))))) (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse1 .cse2 (select (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) .cse3))))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_157|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_233) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1)))) is different from false [2022-11-03 01:40:42,454 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse6 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_161| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_161|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_157|)) (forall ((v_ArrVal_233 Int) (v_ArrVal_226 Int)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) (select (store (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse8 (+ (* |v_ULTIMATE.start_main_~i~0#1_161| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_226)))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse3 (select (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse0 (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse3))))) (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse1 .cse2 (select (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) .cse3))))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_157|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_233) |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_161| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_161|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_157|)) (forall ((v_ArrVal_233 Int) (v_ArrVal_226 Int)) (< (select (store (let ((.cse13 (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse8 (+ (* |v_ULTIMATE.start_main_~i~0#1_161| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_226)))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse10 (select .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse12 (select (select .cse13 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse11 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse9 (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11 .cse12))))) (store (select .cse9 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse10 .cse11 (select (select .cse9 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) .cse12))))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_157|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_233) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ 3 |c_ULTIMATE.start_main_~i~0#1|)))))))))) is different from false [2022-11-03 01:40:44,525 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse15 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse15 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))) (let ((.cse6 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_161| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_161|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (forall ((v_ArrVal_233 Int) (v_ArrVal_226 Int)) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (select (store (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse8 (+ (* |v_ULTIMATE.start_main_~i~0#1_161| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_226)))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse0 (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse3))))) (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse1 (select (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) .cse2 .cse3))))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_157|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_233) |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_157|)))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_161| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_161|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (forall ((v_ArrVal_233 Int) (v_ArrVal_226 Int)) (< (select (store (let ((.cse13 (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse8 (+ (* |v_ULTIMATE.start_main_~i~0#1_161| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_226)))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse10 (select .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse11 (select (select .cse13 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse12 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse9 (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11 .cse12))))) (store (select .cse9 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse10 (select (select .cse9 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) .cse11 .cse12))))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_157|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_233) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ |c_ULTIMATE.start_main_~i~0#1| 4))) (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_157|))))))))) is different from false [2022-11-03 01:40:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-03 01:40:44,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742813686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:44,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559772406] [2022-11-03 01:40:44,585 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:40:44,586 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:44,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:44,586 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:44,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,795 INFO L356 Elim1Store]: treesize reduction 142, result has 27.2 percent of original size [2022-11-03 01:40:44,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 76 [2022-11-03 01:40:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,819 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 26 treesize of output 28 [2022-11-03 01:40:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,011 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:40:45,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:40:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:40:45,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,256 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:40:45,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:40:45,352 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 01:40:45,367 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 01:40:45,406 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:40:45,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-11-03 01:40:45,442 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 01:40:45,476 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:40:45,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:40:45,547 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:40:45,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:40:45,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:45,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:45,627 INFO L356 Elim1Store]: treesize reduction 33, result has 52.2 percent of original size [2022-11-03 01:40:45,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 50 [2022-11-03 01:40:45,745 INFO L356 Elim1Store]: treesize reduction 53, result has 55.5 percent of original size [2022-11-03 01:40:45,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 80 [2022-11-03 01:40:45,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:46,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '912#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem16#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:46,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:46,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:46,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-11-03 01:40:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549902996] [2022-11-03 01:40:46,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:46,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 01:40:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:46,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 01:40:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1471, Unknown=17, NotChecked=240, Total=1892 [2022-11-03 01:40:46,492 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:47,785 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-11-03 01:40:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:40:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 01:40:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:47,786 INFO L225 Difference]: With dead ends: 38 [2022-11-03 01:40:47,786 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:40:47,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=203, Invalid=1771, Unknown=18, NotChecked=264, Total=2256 [2022-11-03 01:40:47,788 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:47,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-11-03 01:40:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:40:47,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-11-03 01:40:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-11-03 01:40:47,798 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-11-03 01:40:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:47,799 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-11-03 01:40:47,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-11-03 01:40:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:40:47,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:47,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:47,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:48,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:40:48,002 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash -108509294, now seen corresponding path program 5 times [2022-11-03 01:40:48,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:48,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165016525] [2022-11-03 01:40:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:48,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:48,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165016525] [2022-11-03 01:40:48,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165016525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555477235] [2022-11-03 01:40:48,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:40:48,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:48,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:48,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:48,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:40:48,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:40:48,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:40:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:48,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:48,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555477235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:48,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461922152] [2022-11-03 01:40:48,422 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:40:48,422 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:48,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:48,423 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:48,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:48,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,444 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 26 treesize of output 28 [2022-11-03 01:40:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,606 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:40:48,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:40:48,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 19 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:40:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:40:48,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:48,839 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:40:48,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:40:48,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 01:40:48,942 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 01:40:48,978 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:40:48,979 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 66 treesize of output 71 [2022-11-03 01:40:49,010 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 01:40:49,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:49,045 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:40:49,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:40:49,115 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:40:49,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:40:49,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:49,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:49,191 INFO L356 Elim1Store]: treesize reduction 33, result has 52.2 percent of original size [2022-11-03 01:40:49,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 50 [2022-11-03 01:40:49,294 INFO L356 Elim1Store]: treesize reduction 53, result has 55.5 percent of original size [2022-11-03 01:40:49,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 80 [2022-11-03 01:40:49,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:49,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1167#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem16#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:49,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:49,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:49,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 01:40:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105468362] [2022-11-03 01:40:49,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:49,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:40:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:40:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:40:49,748 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:49,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:49,907 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-11-03 01:40:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:40:49,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 01:40:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:49,909 INFO L225 Difference]: With dead ends: 85 [2022-11-03 01:40:49,909 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 01:40:49,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:40:49,910 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:49,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 30 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 01:40:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-11-03 01:40:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-11-03 01:40:49,921 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-11-03 01:40:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:49,921 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-11-03 01:40:49,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-11-03 01:40:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:40:49,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:49,922 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:49,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 01:40:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:40:50,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -423339907, now seen corresponding path program 6 times [2022-11-03 01:40:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676514390] [2022-11-03 01:40:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:50,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676514390] [2022-11-03 01:40:50,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676514390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927751963] [2022-11-03 01:40:50,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:40:50,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:50,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:50,245 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:40:50,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:40:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:40:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:50,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:50,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927751963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:50,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690913879] [2022-11-03 01:40:50,482 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:40:50,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:50,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:50,482 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:50,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:50,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,509 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 26 treesize of output 28 [2022-11-03 01:40:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,708 INFO L356 Elim1Store]: treesize reduction 142, result has 27.2 percent of original size [2022-11-03 01:40:50,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 76 [2022-11-03 01:40:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,882 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:40:50,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:40:50,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:50,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:40:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:51,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:51,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:51,107 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:40:51,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:40:51,273 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 01:40:51,293 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 01:40:51,331 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:40:51,331 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 66 treesize of output 71 [2022-11-03 01:40:51,366 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 01:40:51,400 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:40:51,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:40:51,465 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:40:51,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:40:51,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:51,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:51,556 INFO L356 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-03 01:40:51,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-11-03 01:40:51,658 INFO L356 Elim1Store]: treesize reduction 53, result has 55.5 percent of original size [2022-11-03 01:40:51,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 80 [2022-11-03 01:40:51,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:52,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1510#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem16#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:52,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:52,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:52,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 01:40:52,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213698993] [2022-11-03 01:40:52,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:52,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:40:52,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:40:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:40:52,038 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:52,334 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-11-03 01:40:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:40:52,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 01:40:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:52,337 INFO L225 Difference]: With dead ends: 67 [2022-11-03 01:40:52,337 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 01:40:52,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:40:52,339 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:52,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 01:40:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-11-03 01:40:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-03 01:40:52,356 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2022-11-03 01:40:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:52,356 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-03 01:40:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-03 01:40:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:40:52,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:52,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:52,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:52,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:52,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1748691183, now seen corresponding path program 1 times [2022-11-03 01:40:52,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:52,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660791242] [2022-11-03 01:40:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:52,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:53,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660791242] [2022-11-03 01:40:53,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660791242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307948704] [2022-11-03 01:40:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:53,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:53,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:53,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91a725d-a055-48f2-bf10-6a1e7c820e80/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:40:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:54,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 01:40:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:54,085 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:40:54,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:40:54,236 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 16 treesize of output 12 [2022-11-03 01:40:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:54,316 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 21 treesize of output 20 [2022-11-03 01:40:54,407 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 23 treesize of output 23 [2022-11-03 01:40:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:54,449 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 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 01:40:54,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:40:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:54,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 49 [2022-11-03 01:40:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:54,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2022-11-03 01:40:55,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 42 [2022-11-03 01:40:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:40:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:57,915 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_414 Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_414)))) (let ((.cse0 (+ v_ArrVal_414 (select (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse1 (+ c_~N~0 1))) (or (not (= .cse0 .cse1)) (= (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)))) (+ (select (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) .cse1))))) is different from false [2022-11-03 01:40:57,927 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:40:57,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 85 [2022-11-03 01:41:00,265 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse0 (+ (select (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))) (.cse1 (+ c_~N~0 1))) (or (not (= .cse0 .cse1)) (= (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)))) (+ (select (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)))) .cse1))))) is different from false [2022-11-03 01:41:02,553 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse0 (+ (select (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))) (.cse1 (+ c_~N~0 1))) (or (not (= .cse0 .cse1)) (= (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)))) (+ (select (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)))) .cse1))))) is different from false [2022-11-03 01:41:02,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:41:02,600 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 225 treesize of output 110 [2022-11-03 01:41:02,653 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:41:02,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2259 treesize of output 2101 [2022-11-03 01:41:02,727 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:41:02,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 2848 treesize of output 2372