./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0 --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 1e103c401871989cc14d279d58bbc5c5cf6c927e71f95ee371c76ee69c6b1150 --- 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-e04fb08 [2022-11-16 19:33:15,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:33:15,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:33:15,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:33:15,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:33:15,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:33:15,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:33:16,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:33:16,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:33:16,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:33:16,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:33:16,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:33:16,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:33:16,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:33:16,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:33:16,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:33:16,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:33:16,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:33:16,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:33:16,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:33:16,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:33:16,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:33:16,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:33:16,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:33:16,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:33:16,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:33:16,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:33:16,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:33:16,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:33:16,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:33:16,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:33:16,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:33:16,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:33:16,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:33:16,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:33:16,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:33:16,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:33:16,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:33:16,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:33:16,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:33:16,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:33:16,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:33:16,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:33:16,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:33:16,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:33:16,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:33:16,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:33:16,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:33:16,091 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:33:16,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:33:16,091 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:33:16,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:33:16,091 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:33:16,092 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:33:16,092 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:33:16,092 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:33:16,092 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:33:16,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:33:16,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:33:16,093 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:33:16,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:33:16,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:33:16,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:33:16,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:33:16,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:33:16,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:33:16,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:33:16,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:33:16,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:33:16,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:33:16,096 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:33:16,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:33:16,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:33:16,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:33:16,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:33:16,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:33:16,097 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:33:16,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:33:16,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:33:16,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:33:16,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:33:16,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:33:16,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:33:16,099 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_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e103c401871989cc14d279d58bbc5c5cf6c927e71f95ee371c76ee69c6b1150 [2022-11-16 19:33:16,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:33:16,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:33:16,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:33:16,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:33:16,432 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:33:16,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/reducercommutativity/sum60-2.i [2022-11-16 19:33:16,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/data/487e3bf2b/de18812cfc0b4d7dacc1903a0bb0b02e/FLAGe57e7d50d [2022-11-16 19:33:17,031 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:33:17,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/sv-benchmarks/c/reducercommutativity/sum60-2.i [2022-11-16 19:33:17,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/data/487e3bf2b/de18812cfc0b4d7dacc1903a0bb0b02e/FLAGe57e7d50d [2022-11-16 19:33:17,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/data/487e3bf2b/de18812cfc0b4d7dacc1903a0bb0b02e [2022-11-16 19:33:17,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:33:17,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:33:17,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:33:17,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:33:17,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:33:17,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b1c85ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17, skipping insertion in model container [2022-11-16 19:33:17,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:33:17,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:33:17,653 WARN L229 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_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/sv-benchmarks/c/reducercommutativity/sum60-2.i[1277,1290] [2022-11-16 19:33:17,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:33:17,664 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:33:17,684 WARN L229 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_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/sv-benchmarks/c/reducercommutativity/sum60-2.i[1277,1290] [2022-11-16 19:33:17,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:33:17,697 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:33:17,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17 WrapperNode [2022-11-16 19:33:17,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:33:17,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:33:17,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:33:17,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:33:17,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,739 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-16 19:33:17,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:33:17,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:33:17,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:33:17,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:33:17,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:33:17,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:33:17,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:33:17,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:33:17,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (1/1) ... [2022-11-16 19:33:17,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:33:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:17,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:33:17,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:33:17,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:33:17,846 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-11-16 19:33:17,846 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-11-16 19:33:17,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:33:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:33:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:33:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:33:17,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:33:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:33:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:33:17,939 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:33:17,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:33:18,187 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:33:18,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:33:18,273 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 19:33:18,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:33:18 BoogieIcfgContainer [2022-11-16 19:33:18,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:33:18,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:33:18,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:33:18,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:33:18,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:33:17" (1/3) ... [2022-11-16 19:33:18,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4141b77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:33:18, skipping insertion in model container [2022-11-16 19:33:18,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:17" (2/3) ... [2022-11-16 19:33:18,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4141b77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:33:18, skipping insertion in model container [2022-11-16 19:33:18,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:33:18" (3/3) ... [2022-11-16 19:33:18,300 INFO L112 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2022-11-16 19:33:18,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:33:18,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:33:18,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:33:18,407 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;@7ace827b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:33:18,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:33:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:33:18,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:18,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:18,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -93755173, now seen corresponding path program 1 times [2022-11-16 19:33:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:18,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228991666] [2022-11-16 19:33:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:33:18,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:18,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228991666] [2022-11-16 19:33:18,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228991666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:18,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:33:18,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:33:18,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961198238] [2022-11-16 19:33:18,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:33:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:33:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:33:18,777 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:33:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:18,858 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-16 19:33:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:33:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-16 19:33:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:18,870 INFO L225 Difference]: With dead ends: 33 [2022-11-16 19:33:18,871 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:33:18,874 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 [2022-11-16 19:33:18,878 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:18,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:33:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 19:33:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 19:33:18,923 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-16 19:33:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:18,923 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 19:33:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:33:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 19:33:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 19:33:18,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:18,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:33:18,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash 3079074, now seen corresponding path program 1 times [2022-11-16 19:33:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:18,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943446416] [2022-11-16 19:33:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:18,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:33:19,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943446416] [2022-11-16 19:33:19,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943446416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848523921] [2022-11-16 19:33:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:19,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:19,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:19,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:19,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:33:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:33:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:33:19,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:33:19,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848523921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:19,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:33:19,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 19:33:19,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503699826] [2022-11-16 19:33:19,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:19,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:33:19,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:19,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:33:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:19,283 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:33:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:19,317 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-16 19:33:19,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:33:19,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-16 19:33:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:19,324 INFO L225 Difference]: With dead ends: 29 [2022-11-16 19:33:19,325 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 19:33:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:19,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:19,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:33:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 19:33:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 19:33:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-16 19:33:19,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-16 19:33:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:19,341 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-16 19:33:19,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:33:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-16 19:33:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:33:19,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:19,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:19,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:19,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1452369158, now seen corresponding path program 1 times [2022-11-16 19:33:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108385347] [2022-11-16 19:33:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:33:19,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108385347] [2022-11-16 19:33:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108385347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:19,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051766239] [2022-11-16 19:33:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:19,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:19,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:19,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:33:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:33:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:33:19,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:33:19,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051766239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:19,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:33:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 19:33:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713248054] [2022-11-16 19:33:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:33:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:33:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:19,875 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:33:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:19,893 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-16 19:33:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:33:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-16 19:33:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:19,895 INFO L225 Difference]: With dead ends: 27 [2022-11-16 19:33:19,895 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 19:33:19,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:19,896 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:19,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:33:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 19:33:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-16 19:33:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-16 19:33:19,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-16 19:33:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:19,902 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-16 19:33:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:33:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-16 19:33:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 19:33:19,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:19,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:19,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:20,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:20,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:20,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1362806936, now seen corresponding path program 1 times [2022-11-16 19:33:20,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:20,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217017780] [2022-11-16 19:33:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:20,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:33:20,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217017780] [2022-11-16 19:33:20,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217017780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675937881] [2022-11-16 19:33:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:20,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:20,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:20,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:33:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:33:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:33:20,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:33:20,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675937881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:20,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113616384] [2022-11-16 19:33:20,360 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:33:20,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:20,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:20,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:20,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:20,491 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:33:20,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:33:20,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:20,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:33:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:20,554 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-11-16 19:33:20,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:20,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:20,710 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:33:20,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:33:20,871 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:33:20,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:20,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:33:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:21,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:33:21,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:21,230 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:33:21,230 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:33:21,340 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:33:21,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:21,503 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:33:21,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:26,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_sum_~ret~0_BEFORE_RETURN_6 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) (+ (mod v_sum_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:26,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:26,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:26,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-16 19:33:26,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267521462] [2022-11-16 19:33:26,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:26,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:33:26,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:33:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:33:26,571 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:33:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:26,614 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-16 19:33:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:33:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-16 19:33:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:26,616 INFO L225 Difference]: With dead ends: 36 [2022-11-16 19:33:26,616 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 19:33:26,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:33:26,619 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:26,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:33:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 19:33:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 19:33:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-16 19:33:26,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-16 19:33:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:26,628 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-16 19:33:26,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:33:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-16 19:33:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 19:33:26,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:26,629 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:26,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:26,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:26,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:26,835 INFO L85 PathProgramCache]: Analyzing trace with hash -289862895, now seen corresponding path program 2 times [2022-11-16 19:33:26,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:26,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256410727] [2022-11-16 19:33:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:26,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:33:26,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256410727] [2022-11-16 19:33:26,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256410727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334867014] [2022-11-16 19:33:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:26,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:26,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:26,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:33:27,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:33:27,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:33:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:33:27,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:33:27,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334867014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179807936] [2022-11-16 19:33:27,067 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:33:27,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:27,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:27,068 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:27,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,098 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:33:27,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:33:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:33:27,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,128 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:33:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,207 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:33:27,208 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:33:27,257 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:33:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:33:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:27,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:33:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:27,487 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:33:27,487 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:33:27,518 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:33:27,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:27,672 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:33:27,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:34,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (exists ((v_sum_~ret~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_11 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_11 4294967296) (+ (mod v_sum_~ret~0_BEFORE_RETURN_11 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:34,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:34,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:34,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 19:33:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193344996] [2022-11-16 19:33:34,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:34,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:33:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:33:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:33:34,784 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:33:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:34,823 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-16 19:33:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:33:34,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-16 19:33:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:34,825 INFO L225 Difference]: With dead ends: 38 [2022-11-16 19:33:34,825 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 19:33:34,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:33:34,826 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:34,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:33:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 19:33:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-16 19:33:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-16 19:33:34,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-16 19:33:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:34,832 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-16 19:33:34,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:33:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-16 19:33:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 19:33:34,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:34,833 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:34,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:35,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:35,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash 635166223, now seen corresponding path program 3 times [2022-11-16 19:33:35,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:35,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996197726] [2022-11-16 19:33:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:35,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-16 19:33:35,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:35,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996197726] [2022-11-16 19:33:35,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996197726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709975028] [2022-11-16 19:33:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:33:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:35,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:35,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:33:35,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:33:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:33:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 19:33:35,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 19:33:35,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709975028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518102245] [2022-11-16 19:33:35,404 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:33:35,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:35,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:35,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:35,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,429 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:33:35,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:33:35,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,473 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:33:35,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:33:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,494 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-11-16 19:33:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:35,565 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:33:35,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:33:35,633 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:33:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:33:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:35,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:33:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:35,861 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:33:35,861 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:33:35,890 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:33:35,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:36,021 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:33:36,054 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:39,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (exists ((v_sum_~ret~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_18 4294967296) (+ (- 4294967296) (mod v_sum_~ret~0_BEFORE_RETURN_18 4294967296))))) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:39,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:39,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:39,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-16 19:33:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229199382] [2022-11-16 19:33:39,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:39,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:33:39,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:39,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:33:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:33:39,053 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:33:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:39,130 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-16 19:33:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:33:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-16 19:33:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:39,132 INFO L225 Difference]: With dead ends: 49 [2022-11-16 19:33:39,132 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 19:33:39,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:33:39,134 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:39,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 19:33:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-16 19:33:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-16 19:33:39,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-16 19:33:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:39,139 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-16 19:33:39,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:33:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-16 19:33:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 19:33:39,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:39,141 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:39,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:39,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:39,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:39,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1872322245, now seen corresponding path program 4 times [2022-11-16 19:33:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:39,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539737367] [2022-11-16 19:33:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 19:33:39,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:39,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539737367] [2022-11-16 19:33:39,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539737367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:39,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475417287] [2022-11-16 19:33:39,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:33:39,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:39,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:39,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:33:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:33:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 19:33:39,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 19:33:40,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475417287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:40,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958856819] [2022-11-16 19:33:40,040 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:33:40,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:40,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:40,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:40,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,068 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:33:40,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:33:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,098 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:33:40,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:33:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,117 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:33:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,190 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:33:40,190 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:33:40,230 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:33:40,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:33:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:40,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:33:40,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:40,409 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:33:40,409 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:33:40,431 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:33:40,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:40,542 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:33:40,588 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:45,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_sum_~ret~0_BEFORE_RETURN_23 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_23 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_23 4294967296) (+ (- 4294967296) (mod v_sum_~ret~0_BEFORE_RETURN_23 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:45,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:45,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:45,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-16 19:33:45,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807249542] [2022-11-16 19:33:45,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:45,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 19:33:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 19:33:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 19:33:45,682 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:33:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:45,746 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-16 19:33:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:33:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-16 19:33:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:45,748 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:33:45,748 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 19:33:45,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 19:33:45,750 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:45,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:33:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 19:33:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-16 19:33:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-16 19:33:45,757 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-16 19:33:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:45,757 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-16 19:33:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:33:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-16 19:33:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 19:33:45,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:45,759 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:45,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 19:33:45,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:45,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash 946876027, now seen corresponding path program 5 times [2022-11-16 19:33:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:45,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198322804] [2022-11-16 19:33:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 19:33:46,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198322804] [2022-11-16 19:33:46,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198322804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566250397] [2022-11-16 19:33:46,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:46,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:46,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:46,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:33:46,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:33:46,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:46,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:33:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-16 19:33:47,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-16 19:33:47,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566250397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98269491] [2022-11-16 19:33:47,166 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:33:47,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:47,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:47,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:47,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,200 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:33:47,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:33:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,227 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:33:47,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:33:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,247 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:33:47,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,300 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:33:47,301 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:33:47,339 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:33:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:33:47,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:33:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,518 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:33:47,518 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:33:47,563 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:33:47,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:47,689 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:33:47,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:50,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (exists ((v_sum_~ret~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_29 4294967296) (+ (- 4294967296) (mod v_sum_~ret~0_BEFORE_RETURN_29 4294967296))))) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:50,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:50,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:50,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-16 19:33:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701130459] [2022-11-16 19:33:50,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 19:33:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:50,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 19:33:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 19:33:50,988 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:33:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:51,115 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-16 19:33:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 19:33:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-16 19:33:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:51,121 INFO L225 Difference]: With dead ends: 69 [2022-11-16 19:33:51,121 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 19:33:51,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 19:33:51,123 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:51,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 19:33:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 19:33:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-16 19:33:51,140 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-16 19:33:51,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:51,141 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-16 19:33:51,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:33:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-16 19:33:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 19:33:51,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:51,143 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:51,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:51,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash -738492862, now seen corresponding path program 6 times [2022-11-16 19:33:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:51,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947896803] [2022-11-16 19:33:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:51,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:33:52,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947896803] [2022-11-16 19:33:52,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947896803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417122103] [2022-11-16 19:33:52,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:33:52,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:52,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:52,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:52,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:33:52,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:33:52,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:33:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:33:52,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:33:53,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417122103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:53,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52248412] [2022-11-16 19:33:53,535 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:33:53,535 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:53,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:53,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:53,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:53,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,566 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:33:53,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:33:53,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,592 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:33:53,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:33:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,612 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:33:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,672 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:33:53,673 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:33:53,714 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:33:53,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:33:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:33:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,918 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-16 19:33:53,919 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-16 19:33:53,962 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:33:53,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:54,110 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:33:54,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:57,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (exists ((v_sum_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_36 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_36 4294967296) (+ (mod v_sum_~ret~0_BEFORE_RETURN_36 4294967296) (- 4294967296))))) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:57,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:57,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:57,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-16 19:33:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275656336] [2022-11-16 19:33:57,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:57,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 19:33:57,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 19:33:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 19:33:57,576 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:33:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:57,708 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-16 19:33:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 19:33:57,709 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-16 19:33:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:57,712 INFO L225 Difference]: With dead ends: 100 [2022-11-16 19:33:57,712 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 19:33:57,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 19:33:57,716 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:57,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 19:33:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-16 19:33:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:33:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-16 19:33:57,740 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-16 19:33:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:57,741 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-16 19:33:57,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:33:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-16 19:33:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-16 19:33:57,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:57,746 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:57,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 19:33:57,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:57,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash 527651355, now seen corresponding path program 7 times [2022-11-16 19:33:57,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:57,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428548289] [2022-11-16 19:33:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:57,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:34:00,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428548289] [2022-11-16 19:34:00,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428548289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165756732] [2022-11-16 19:34:00,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:34:00,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:00,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:00,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:00,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:34:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:00,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 19:34:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:34:00,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:34:02,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165756732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:02,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812853962] [2022-11-16 19:34:02,835 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:02,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:02,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:02,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:02,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,862 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:34:02,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:34:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,890 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:02,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,915 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-11-16 19:34:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:02,973 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:34:02,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:34:03,054 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:03,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:03,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:03,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:03,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:34:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:03,241 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:34:03,242 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:34:03,276 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:03,396 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:03,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:08,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3859#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:08,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:08,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:08,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 63 [2022-11-16 19:34:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973859374] [2022-11-16 19:34:08,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-16 19:34:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-16 19:34:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2012, Invalid=3687, Unknown=1, NotChecked=0, Total=5700 [2022-11-16 19:34:08,946 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:34:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:09,062 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2022-11-16 19:34:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 19:34:09,063 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-16 19:34:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:09,064 INFO L225 Difference]: With dead ends: 112 [2022-11-16 19:34:09,064 INFO L226 Difference]: Without dead ends: 87 [2022-11-16 19:34:09,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 38 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2012, Invalid=3687, Unknown=1, NotChecked=0, Total=5700 [2022-11-16 19:34:09,066 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:09,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-16 19:34:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-16 19:34:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-11-16 19:34:09,074 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 100 [2022-11-16 19:34:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:09,075 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-11-16 19:34:09,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:34:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-11-16 19:34:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 19:34:09,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:09,077 INFO L195 NwaCegarLoop]: trace histogram [60, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:09,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:09,283 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash 108273499, now seen corresponding path program 8 times [2022-11-16 19:34:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:09,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760746744] [2022-11-16 19:34:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2022-11-16 19:34:09,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:09,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760746744] [2022-11-16 19:34:09,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760746744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:09,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664065980] [2022-11-16 19:34:09,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:34:09,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:09,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:09,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:34:09,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:34:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:34:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-11-16 19:34:10,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2022-11-16 19:34:10,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664065980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:10,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667686167] [2022-11-16 19:34:10,074 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:10,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:10,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:10,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:10,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,105 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:10,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:34:10,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,131 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:34:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,183 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:34:10,183 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:34:10,238 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:10,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:34:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:10,406 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:34:10,407 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:34:10,428 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:10,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:10,536 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:10,565 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:11,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4932#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (exists ((v_sum_~ret~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_48 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_48 4294967296) (+ (mod v_sum_~ret~0_BEFORE_RETURN_48 4294967296) (- 4294967296))))) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:11,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:11,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:11,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-16 19:34:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800452323] [2022-11-16 19:34:11,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:11,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 19:34:11,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 19:34:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-16 19:34:11,672 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:34:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:11,745 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2022-11-16 19:34:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 19:34:11,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2022-11-16 19:34:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:11,747 INFO L225 Difference]: With dead ends: 116 [2022-11-16 19:34:11,747 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 19:34:11,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-16 19:34:11,749 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:11,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 19:34:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-16 19:34:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-11-16 19:34:11,769 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 112 [2022-11-16 19:34:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:11,769 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-11-16 19:34:11,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:34:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-11-16 19:34:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 19:34:11,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:11,773 INFO L195 NwaCegarLoop]: trace histogram [60, 33, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:11,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 19:34:11,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1456972973, now seen corresponding path program 9 times [2022-11-16 19:34:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633726651] [2022-11-16 19:34:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-16 19:34:12,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:12,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633726651] [2022-11-16 19:34:12,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633726651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:12,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964905953] [2022-11-16 19:34:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:34:12,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:12,507 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:34:12,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:34:12,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:34:12,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 290 proven. 66 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-16 19:34:12,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-16 19:34:13,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964905953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:13,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58028923] [2022-11-16 19:34:13,104 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:13,104 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:13,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:13,105 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:13,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,136 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:13,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:13,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:34:13,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,161 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:34:13,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,215 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:34:13,216 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:34:13,256 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:13,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:34:13,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:13,451 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:34:13,452 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:34:13,489 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:13,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:13,594 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:13,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:18,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6073#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_sum_~ret~0_BEFORE_RETURN_53 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_53 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_53 4294967296) (+ (mod v_sum_~ret~0_BEFORE_RETURN_53 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:18,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:18,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:18,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-16 19:34:18,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966345636] [2022-11-16 19:34:18,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:18,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 19:34:18,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 19:34:18,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 19:34:18,727 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:34:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:18,803 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2022-11-16 19:34:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:34:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 119 [2022-11-16 19:34:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:18,805 INFO L225 Difference]: With dead ends: 134 [2022-11-16 19:34:18,805 INFO L226 Difference]: Without dead ends: 105 [2022-11-16 19:34:18,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 19:34:18,806 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:18,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-16 19:34:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-16 19:34:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-11-16 19:34:18,814 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 119 [2022-11-16 19:34:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:18,815 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-11-16 19:34:18,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:34:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-11-16 19:34:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-16 19:34:18,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:18,817 INFO L195 NwaCegarLoop]: trace histogram [72, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:18,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 19:34:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:19,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1191888795, now seen corresponding path program 10 times [2022-11-16 19:34:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367119424] [2022-11-16 19:34:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-11-16 19:34:20,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367119424] [2022-11-16 19:34:20,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367119424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066817085] [2022-11-16 19:34:20,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:34:20,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:20,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:20,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:20,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:34:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:20,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 19:34:20,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 1252 proven. 300 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-11-16 19:34:20,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-11-16 19:34:21,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066817085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:21,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50311534] [2022-11-16 19:34:21,641 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:21,641 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:21,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:21,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:21,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,663 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:34:21,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:34:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,685 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:21,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:21,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,709 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:34:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,779 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:34:21,780 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:34:21,817 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:21,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:21,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:34:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:22,012 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:34:22,013 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:34:22,038 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:22,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:22,161 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:22,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:25,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7536#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:25,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:25,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:25,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-16 19:34:25,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733525697] [2022-11-16 19:34:25,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:25,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 19:34:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 19:34:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=2852, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 19:34:25,477 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:34:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:25,577 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2022-11-16 19:34:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 19:34:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 158 [2022-11-16 19:34:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:25,581 INFO L225 Difference]: With dead ends: 173 [2022-11-16 19:34:25,581 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 19:34:25,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1438, Invalid=2852, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 19:34:25,586 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:25,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 19:34:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-16 19:34:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-11-16 19:34:25,595 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 158 [2022-11-16 19:34:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:25,596 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-11-16 19:34:25,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:34:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-11-16 19:34:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-16 19:34:25,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:25,599 INFO L195 NwaCegarLoop]: trace histogram [150, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:25,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 19:34:25,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:25,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1092809563, now seen corresponding path program 11 times [2022-11-16 19:34:25,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:25,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380504936] [2022-11-16 19:34:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 6479 refuted. 0 times theorem prover too weak. 7006 trivial. 0 not checked. [2022-11-16 19:34:29,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:29,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380504936] [2022-11-16 19:34:29,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380504936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:29,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642216987] [2022-11-16 19:34:29,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:34:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:29,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:34:29,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 19:34:29,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:34:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 5206 proven. 21 refuted. 0 times theorem prover too weak. 8258 trivial. 0 not checked. [2022-11-16 19:34:29,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13464 trivial. 0 not checked. [2022-11-16 19:34:30,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642216987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61747614] [2022-11-16 19:34:30,288 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:30,289 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:30,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:30,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:30,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:30,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,324 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:34:30,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:34:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,347 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:30,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,364 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:34:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,419 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:34:30,420 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:34:30,457 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:30,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:30,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:34:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:30,643 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:34:30,643 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2022-11-16 19:34:30,663 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:30,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:30,779 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:30,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:34,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9611#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:34,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:34,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:34,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2022-11-16 19:34:34,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814490475] [2022-11-16 19:34:34,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:34,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 19:34:34,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:34,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 19:34:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=4763, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:34:34,456 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:34:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:34,599 INFO L93 Difference]: Finished difference Result 208 states and 226 transitions. [2022-11-16 19:34:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-16 19:34:34,600 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 236 [2022-11-16 19:34:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:34,601 INFO L225 Difference]: With dead ends: 208 [2022-11-16 19:34:34,601 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 19:34:34,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1557, Invalid=4763, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:34:34,603 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:34,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 19:34:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-11-16 19:34:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-11-16 19:34:34,613 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 236 [2022-11-16 19:34:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:34,613 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-11-16 19:34:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:34:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-11-16 19:34:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-16 19:34:34,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:34,617 INFO L195 NwaCegarLoop]: trace histogram [153, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:34,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:34,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 19:34:34,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -929458259, now seen corresponding path program 12 times [2022-11-16 19:34:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804308271] [2022-11-16 19:34:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2022-11-16 19:34:38,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804308271] [2022-11-16 19:34:38,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804308271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831908816] [2022-11-16 19:34:38,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:34:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:38,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:38,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:34:38,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:34:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 19:34:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 5410 proven. 1326 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2022-11-16 19:34:38,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2022-11-16 19:34:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831908816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228382291] [2022-11-16 19:34:40,525 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:40,525 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:40,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:40,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:40,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,558 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:34:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,588 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:34:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,652 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:34:40,653 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:34:40,702 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:40,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:34:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:40,894 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:34:40,894 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:34:40,927 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:40,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:41,032 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:41,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:48,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11836#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:48,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:48,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:48,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 63 [2022-11-16 19:34:48,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767673610] [2022-11-16 19:34:48,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:48,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-16 19:34:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-16 19:34:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2012, Invalid=3687, Unknown=1, NotChecked=0, Total=5700 [2022-11-16 19:34:48,635 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:34:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:48,767 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2022-11-16 19:34:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 19:34:48,767 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 247 [2022-11-16 19:34:48,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:48,769 INFO L225 Difference]: With dead ends: 226 [2022-11-16 19:34:48,769 INFO L226 Difference]: Without dead ends: 149 [2022-11-16 19:34:48,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 675 SyntacticMatches, 44 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2012, Invalid=3687, Unknown=1, NotChecked=0, Total=5700 [2022-11-16 19:34:48,774 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:48,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-16 19:34:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-16 19:34:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-11-16 19:34:48,784 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 247 [2022-11-16 19:34:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:48,785 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-11-16 19:34:48,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:34:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-11-16 19:34:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-16 19:34:48,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:48,790 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:48,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:48,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 19:34:48,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:48,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2002406629, now seen corresponding path program 13 times [2022-11-16 19:34:48,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:48,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813772028] [2022-11-16 19:34:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:48,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2022-11-16 19:34:49,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813772028] [2022-11-16 19:34:49,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813772028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025951339] [2022-11-16 19:34:49,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:34:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:49,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:50,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:34:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:50,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:34:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 7446 proven. 105 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2022-11-16 19:34:50,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2022-11-16 19:34:50,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025951339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:50,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1990300241] [2022-11-16 19:34:50,948 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:34:50,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:50,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:50,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:50,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:50,975 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:34:50,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:34:50,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:50,997 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:34:50,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:34:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:51,014 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:34:51,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:51,076 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:34:51,077 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:34:51,113 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:34:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:51,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:34:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:51,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:34:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:51,296 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:34:51,298 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:34:51,340 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:34:51,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:51,442 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:34:51,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:58,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14247#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_sum_~ret~0_BEFORE_RETURN_77 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sum_~ret~0_BEFORE_RETURN_77 4294967296) 2147483647) (mod v_sum_~ret~0_BEFORE_RETURN_77 4294967296) (+ (mod v_sum_~ret~0_BEFORE_RETURN_77 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:58,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:58,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:58,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-16 19:34:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748201350] [2022-11-16 19:34:58,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 19:34:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 19:34:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:34:58,553 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:34:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:58,633 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2022-11-16 19:34:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 19:34:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 274 [2022-11-16 19:34:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:58,635 INFO L225 Difference]: With dead ends: 233 [2022-11-16 19:34:58,635 INFO L226 Difference]: Without dead ends: 165 [2022-11-16 19:34:58,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:34:58,653 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:58,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-16 19:34:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-16 19:34:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:34:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-11-16 19:34:58,663 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 274 [2022-11-16 19:34:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:58,664 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-11-16 19:34:58,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:34:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-11-16 19:34:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-16 19:34:58,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:58,666 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:58,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:58,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 726542107, now seen corresponding path program 14 times [2022-11-16 19:34:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325290765] [2022-11-16 19:34:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2022-11-16 19:35:00,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:35:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325290765] [2022-11-16 19:35:00,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325290765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:35:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216650590] [2022-11-16 19:35:00,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:35:00,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:00,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:00,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:00,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:35:15,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-16 19:35:15,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 19:35:15,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 7506 proven. 465 refuted. 0 times theorem prover too weak. 10983 trivial. 0 not checked. [2022-11-16 19:35:15,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2022-11-16 19:35:17,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216650590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:17,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533216462] [2022-11-16 19:35:17,213 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:35:17,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:35:17,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:35:17,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:35:17,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:35:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,245 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:35:17,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:35:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,276 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:35:17,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:35:17,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,293 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-11-16 19:35:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,340 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:35:17,341 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:35:17,377 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:35:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:35:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:35:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:17,547 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:35:17,547 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:35:17,595 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 24 [2022-11-16 19:35:17,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:35:17,702 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 12 for LOIs [2022-11-16 19:35:17,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:35:25,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16832#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 60 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:35:25,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:35:25,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:35:25,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 33] total 63 [2022-11-16 19:35:25,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530887782] [2022-11-16 19:35:25,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:25,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-16 19:35:25,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:35:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-16 19:35:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1952, Invalid=3747, Unknown=1, NotChecked=0, Total=5700 [2022-11-16 19:35:25,035 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:35:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:26,995 INFO L93 Difference]: Finished difference Result 262 states and 295 transitions. [2022-11-16 19:35:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 19:35:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 290 [2022-11-16 19:35:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:26,997 INFO L225 Difference]: With dead ends: 262 [2022-11-16 19:35:26,997 INFO L226 Difference]: Without dead ends: 194 [2022-11-16 19:35:27,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 824 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=5611, Invalid=12478, Unknown=1, NotChecked=0, Total=18090 [2022-11-16 19:35:27,001 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:27,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 60 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:35:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-16 19:35:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-11-16 19:35:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:35:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-11-16 19:35:27,013 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 290 [2022-11-16 19:35:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:27,014 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-11-16 19:35:27,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:35:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-11-16 19:35:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-16 19:35:27,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:27,023 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:27,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:27,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce79dc0-ba0f-4c04-8559-d8811d3d638e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 19:35:27,240 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash -199337457, now seen corresponding path program 15 times [2022-11-16 19:35:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:35:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912706749] [2022-11-16 19:35:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:36:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat