./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_compare_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_compare_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS --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 d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c --- 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-8393723 [2022-11-19 06:57:43,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:57:43,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:57:43,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:57:43,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:57:43,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:57:43,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:57:43,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:57:43,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:57:43,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:57:43,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:57:43,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:57:43,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:57:43,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:57:43,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:57:43,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:57:43,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:57:43,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:57:43,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:57:43,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:57:43,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:57:43,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:57:43,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:57:43,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:57:43,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:57:43,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:57:43,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:57:43,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:57:43,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:57:43,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:57:43,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:57:43,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:57:43,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:57:43,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:57:43,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:57:43,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:57:43,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:57:43,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:57:43,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:57:43,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:57:43,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:57:43,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:57:43,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:57:43,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:57:43,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:57:43,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:57:43,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:57:43,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:57:43,654 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:57:43,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:57:43,655 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:57:43,655 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:57:43,657 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:57:43,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:57:43,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:57:43,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:57:43,658 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:57:43,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:57:43,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:57:43,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:57:43,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:57:43,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:57:43,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:57:43,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:57:43,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:57:43,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:57:43,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:57:43,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:57:43,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:57:43,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:57:43,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:57:43,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:57:43,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:57:43,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:57:43,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:57:43,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:57:43,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:57:43,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:57:43,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:57:43,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:57:43,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:57:43,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:57:43,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:57:43,667 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_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c [2022-11-19 06:57:43,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:57:43,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:57:43,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:57:43,963 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:57:43,964 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:57:43,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-11-19 06:57:44,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/data/304950650/09b3e590cf664ea898ef4dbab643b752/FLAG5ed419771 [2022-11-19 06:57:44,592 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:57:44,593 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-11-19 06:57:44,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/data/304950650/09b3e590cf664ea898ef4dbab643b752/FLAG5ed419771 [2022-11-19 06:57:44,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/data/304950650/09b3e590cf664ea898ef4dbab643b752 [2022-11-19 06:57:44,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:57:44,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:57:44,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:57:44,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:57:44,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:57:44,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:57:44" (1/1) ... [2022-11-19 06:57:44,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bffe90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:44, skipping insertion in model container [2022-11-19 06:57:44,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:57:44" (1/1) ... [2022-11-19 06:57:44,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:57:44,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:57:45,139 WARN L234 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_ca1ef1f1-5375-4325-ac53-acff1e24023b/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-11-19 06:57:45,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:57:45,189 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:57:45,205 WARN L234 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_ca1ef1f1-5375-4325-ac53-acff1e24023b/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-11-19 06:57:45,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:57:45,246 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:57:45,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45 WrapperNode [2022-11-19 06:57:45,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:57:45,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:57:45,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:57:45,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:57:45,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,292 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-19 06:57:45,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:57:45,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:57:45,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:57:45,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:57:45,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:57:45,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:57:45,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:57:45,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:57:45,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (1/1) ... [2022-11-19 06:57:45,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:57:45,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:45,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:57:45,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:57:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:57:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:57:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:57:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:57:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:57:45,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:57:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:57:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:57:45,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:57:45,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:57:45,644 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:57:45,693 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:57:45,693 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 06:57:45,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:57:45 BoogieIcfgContainer [2022-11-19 06:57:45,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:57:45,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:57:45,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:57:45,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:57:45,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:57:44" (1/3) ... [2022-11-19 06:57:45,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd62399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:57:45, skipping insertion in model container [2022-11-19 06:57:45,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:45" (2/3) ... [2022-11-19 06:57:45,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd62399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:57:45, skipping insertion in model container [2022-11-19 06:57:45,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:57:45" (3/3) ... [2022-11-19 06:57:45,736 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2022-11-19 06:57:45,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:57:45,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:57:45,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:57:45,854 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;@70491be0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:57:45,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:57:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:57:45,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:45,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:45,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1742582732, now seen corresponding path program 1 times [2022-11-19 06:57:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:45,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982816448] [2022-11-19 06:57:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:46,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982816448] [2022-11-19 06:57:46,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982816448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:46,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:46,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:57:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134143613] [2022-11-19 06:57:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:46,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:46,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:46,189 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:46,231 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-11-19 06:57:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:57:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:46,242 INFO L225 Difference]: With dead ends: 21 [2022-11-19 06:57:46,242 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 06:57:46,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:46,249 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:46,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 06:57:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 06:57:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-19 06:57:46,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-19 06:57:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:46,327 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-19 06:57:46,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-19 06:57:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:57:46,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:46,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:57:46,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 707561901, now seen corresponding path program 1 times [2022-11-19 06:57:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181900065] [2022-11-19 06:57:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:46,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181900065] [2022-11-19 06:57:46,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181900065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126839194] [2022-11-19 06:57:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:46,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:46,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:57:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:57:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:57:46,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:46,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126839194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:46,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:57:46,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 06:57:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993414635] [2022-11-19 06:57:46,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:46,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:46,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:46,619 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:46,637 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2022-11-19 06:57:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:57:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:46,638 INFO L225 Difference]: With dead ends: 17 [2022-11-19 06:57:46,639 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 06:57:46,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:46,641 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 06:57:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-19 06:57:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-19 06:57:46,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-19 06:57:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:46,645 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-19 06:57:46,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-19 06:57:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:57:46,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:46,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:46,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:46,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash 468576439, now seen corresponding path program 1 times [2022-11-19 06:57:46,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027075966] [2022-11-19 06:57:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:57:46,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027075966] [2022-11-19 06:57:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027075966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753174480] [2022-11-19 06:57:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:46,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:46,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:46,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:46,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:57:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:57:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:57:47,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:57:47,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753174480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:47,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749486964] [2022-11-19 06:57:47,162 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:47,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:47,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:47,171 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:47,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:47,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,292 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:57:47,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:57:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,363 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:47,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:57:47,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:57:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:47,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:47,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:47,700 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:57:47,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 06:57:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:48,275 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:57:48,276 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:57:48,423 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:48,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:48,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:48,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:48,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:57:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060816919] [2022-11-19 06:57:48,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:57:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:57:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:57:48,678 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:48,710 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2022-11-19 06:57:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:57:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:57:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:48,711 INFO L225 Difference]: With dead ends: 22 [2022-11-19 06:57:48,711 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 06:57:48,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:57:48,713 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:48,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 06:57:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 06:57:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-19 06:57:48,717 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-11-19 06:57:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:48,717 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-19 06:57:48,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-19 06:57:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:57:48,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:48,718 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:48,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:48,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 06:57:48,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash 156444880, now seen corresponding path program 2 times [2022-11-19 06:57:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889119855] [2022-11-19 06:57:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:49,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889119855] [2022-11-19 06:57:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889119855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655324268] [2022-11-19 06:57:49,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:57:49,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:49,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:49,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:57:49,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:57:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:57:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:57:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:49,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:49,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655324268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421654121] [2022-11-19 06:57:49,169 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:49,169 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:49,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:49,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:49,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,233 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:57:49,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:57:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,292 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:49,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:57:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:57:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:49,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,473 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:57:49,474 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 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 06:57:49,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:49,601 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:57:49,601 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:57:49,706 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:49,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:49,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:49,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:49,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 06:57:49,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683742839] [2022-11-19 06:57:49,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:57:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:49,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:57:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:57:49,948 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:49,983 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-11-19 06:57:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:57:49,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 06:57:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:49,985 INFO L225 Difference]: With dead ends: 23 [2022-11-19 06:57:49,986 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 06:57:49,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:57:49,989 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:49,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 06:57:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 06:57:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-19 06:57:49,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-11-19 06:57:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:49,993 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-19 06:57:49,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-19 06:57:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:57:49,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:49,994 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:50,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:50,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:50,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash 950999412, now seen corresponding path program 3 times [2022-11-19 06:57:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892891957] [2022-11-19 06:57:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:50,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892891957] [2022-11-19 06:57:50,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892891957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:50,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857993185] [2022-11-19 06:57:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:57:50,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:50,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:50,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:57:50,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:57:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:57:50,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:57:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:50,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:50,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857993185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:50,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947148712] [2022-11-19 06:57:50,530 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:50,531 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:50,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:50,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:50,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,603 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:50,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:57:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 06:57:50,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:57:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:50,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:50,796 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:57:50,796 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 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 06:57:50,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:50,878 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:57:50,878 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:57:50,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:51,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '480#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:51,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:51,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:51,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 06:57:51,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785458654] [2022-11-19 06:57:51,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:51,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:57:51,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:51,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:57:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:57:51,214 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:51,249 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-11-19 06:57:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:57:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 06:57:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:51,250 INFO L225 Difference]: With dead ends: 34 [2022-11-19 06:57:51,250 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 06:57:51,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:57:51,251 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:51,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 06:57:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 06:57:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-19 06:57:51,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-11-19 06:57:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:51,257 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-19 06:57:51,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-19 06:57:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:57:51,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:51,258 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:51,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:51,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 189722324, now seen corresponding path program 4 times [2022-11-19 06:57:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:51,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108003342] [2022-11-19 06:57:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:51,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:51,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108003342] [2022-11-19 06:57:51,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108003342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958916967] [2022-11-19 06:57:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:57:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:51,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:51,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:57:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:57:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:52,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:52,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958916967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:52,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859888821] [2022-11-19 06:57:52,266 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:52,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:52,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:52,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:52,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:52,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,325 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:52,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:57:52,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 06:57:52,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:57:52,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:52,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:52,548 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:57:52,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 06:57:52,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:52,840 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:57:52,840 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:57:52,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:53,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '728#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:53,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:53,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:53,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 06:57:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973861401] [2022-11-19 06:57:53,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:57:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:57:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:57:53,187 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:53,251 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-11-19 06:57:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 06:57:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 06:57:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:53,252 INFO L225 Difference]: With dead ends: 46 [2022-11-19 06:57:53,252 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 06:57:53,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:57:53,253 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:53,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 06:57:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-19 06:57:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-19 06:57:53,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2022-11-19 06:57:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:53,262 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-19 06:57:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-19 06:57:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 06:57:53,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:53,263 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:53,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:53,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:53,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash -503578220, now seen corresponding path program 5 times [2022-11-19 06:57:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:53,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549171608] [2022-11-19 06:57:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:53,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:54,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:54,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549171608] [2022-11-19 06:57:54,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549171608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:54,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908846257] [2022-11-19 06:57:54,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:57:54,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:54,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:54,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:57:54,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:57:54,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:57:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:57:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:57:54,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:57:54,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908846257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757536478] [2022-11-19 06:57:54,632 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:54,632 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:54,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:54,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:54,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,696 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:54,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:57:54,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 06:57:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:57:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:54,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:54,844 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:57:54,845 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 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 06:57:54,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:54,910 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:57:54,911 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:57:55,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:55,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1106#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:55,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:55,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:55,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-19 06:57:55,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167710471] [2022-11-19 06:57:55,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:55,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 06:57:55,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 06:57:55,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 06:57:55,367 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:55,468 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-11-19 06:57:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 06:57:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-19 06:57:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:55,469 INFO L225 Difference]: With dead ends: 53 [2022-11-19 06:57:55,469 INFO L226 Difference]: Without dead ends: 42 [2022-11-19 06:57:55,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 06:57:55,470 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:55,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-19 06:57:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-19 06:57:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-19 06:57:55,480 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2022-11-19 06:57:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:55,480 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-19 06:57:55,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-19 06:57:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:57:55,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:55,482 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:55,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:55,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:55,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1097726579, now seen corresponding path program 6 times [2022-11-19 06:57:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153936931] [2022-11-19 06:57:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:55,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:57:56,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:56,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153936931] [2022-11-19 06:57:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153936931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384029656] [2022-11-19 06:57:56,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:57:56,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:56,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:56,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:57:56,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:57:56,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:57:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:57:56,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:57:56,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:57:57,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384029656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500722087] [2022-11-19 06:57:57,815 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:57,815 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:57,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:57,816 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:57,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:57,873 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:57:57,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:57:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:57,929 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:57,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:57:57,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:57,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:57,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:57:58,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:58,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:58,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:58,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:58,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:58,111 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:57:58,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 06:57:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:58,395 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:57:58,396 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:57:58,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:58,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1570#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:58,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:58,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:58,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-19 06:57:58,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366197596] [2022-11-19 06:57:58,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 06:57:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 06:57:58,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=1890, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:57:58,794 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:58,911 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2022-11-19 06:57:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 06:57:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-19 06:57:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:58,913 INFO L225 Difference]: With dead ends: 84 [2022-11-19 06:57:58,913 INFO L226 Difference]: Without dead ends: 67 [2022-11-19 06:57:58,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1302, Invalid=1890, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:57:58,915 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:58,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-19 06:57:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-19 06:57:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-11-19 06:57:58,924 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 40 [2022-11-19 06:57:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:58,924 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-11-19 06:57:58,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-11-19 06:57:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 06:57:58,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:58,926 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:58,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:59,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 06:57:59,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash -312385356, now seen corresponding path program 7 times [2022-11-19 06:57:59,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:59,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635260235] [2022-11-19 06:57:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:58:01,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635260235] [2022-11-19 06:58:01,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635260235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663879125] [2022-11-19 06:58:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:58:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:01,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:01,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:58:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 06:58:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:58:02,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:58:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663879125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318338216] [2022-11-19 06:58:05,309 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:58:05,309 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:05,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:05,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:05,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,355 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:58:05,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:58:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,410 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:58:05,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:58:05,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:58:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:05,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,551 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:58:05,551 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 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 06:58:05,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:05,648 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:58:05,648 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:58:05,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:06,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2346#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:06,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:06,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:06,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-19 06:58:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102511261] [2022-11-19 06:58:06,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:06,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-19 06:58:06,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-19 06:58:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5077, Invalid=6265, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:58:06,138 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 100 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:06,413 INFO L93 Difference]: Finished difference Result 134 states and 187 transitions. [2022-11-19 06:58:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 06:58:06,414 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 100 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-19 06:58:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:06,419 INFO L225 Difference]: With dead ends: 134 [2022-11-19 06:58:06,420 INFO L226 Difference]: Without dead ends: 117 [2022-11-19 06:58:06,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5077, Invalid=6265, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:58:06,425 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:06,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:58:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-19 06:58:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-19 06:58:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-11-19 06:58:06,449 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 65 [2022-11-19 06:58:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:06,449 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-11-19 06:58:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 100 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-11-19 06:58:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 06:58:06,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:06,452 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:06,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 06:58:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:06,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:58:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1192348972, now seen corresponding path program 8 times [2022-11-19 06:58:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:06,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222919633] [2022-11-19 06:58:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:06,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:58:15,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222919633] [2022-11-19 06:58:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222919633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444486643] [2022-11-19 06:58:15,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:58:15,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:15,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:15,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:15,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:58:15,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 06:58:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:58:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-11-19 06:58:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-11-19 06:58:16,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444486643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:16,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432905485] [2022-11-19 06:58:16,722 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:58:16,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:16,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:16,723 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:16,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,775 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:58:16,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:58:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,833 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:58:16,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:58:16,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:58:16,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:16,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:16,982 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:58:16,982 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 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 06:58:17,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:17,061 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:58:17,062 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:58:17,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:17,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3644#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:17,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:17,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:17,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-19 06:58:17,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917786454] [2022-11-19 06:58:17,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-19 06:58:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:17,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-19 06:58:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5352, Invalid=11160, Unknown=0, NotChecked=0, Total=16512 [2022-11-19 06:58:17,836 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 123 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:18,058 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2022-11-19 06:58:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-19 06:58:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-19 06:58:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:18,061 INFO L225 Difference]: With dead ends: 147 [2022-11-19 06:58:18,062 INFO L226 Difference]: Without dead ends: 130 [2022-11-19 06:58:18,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5352, Invalid=11160, Unknown=0, NotChecked=0, Total=16512 [2022-11-19 06:58:18,067 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:18,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:58:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-19 06:58:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-19 06:58:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-11-19 06:58:18,084 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 115 [2022-11-19 06:58:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-11-19 06:58:18,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-11-19 06:58:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-19 06:58:18,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:18,086 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:18,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:58:18,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:58:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1606713779, now seen corresponding path program 9 times [2022-11-19 06:58:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782402946] [2022-11-19 06:58:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:58:25,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:25,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782402946] [2022-11-19 06:58:25,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782402946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:25,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574550252] [2022-11-19 06:58:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:58:25,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:25,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:25,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:58:26,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:58:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 06:58:26,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:58:26,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:58:38,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574550252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:38,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399137098] [2022-11-19 06:58:38,731 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:58:38,732 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:38,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:38,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:38,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,779 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:58:38,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:58:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,834 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:58:38,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:58:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:58:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:38,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:38,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:39,021 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:58:39,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 06:58:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:39,259 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:58:39,260 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:58:39,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:39,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5152#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:39,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:39,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:39,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-19 06:58:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869389698] [2022-11-19 06:58:39,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:39,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-19 06:58:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-19 06:58:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20530, Invalid=22942, Unknown=0, NotChecked=0, Total=43472 [2022-11-19 06:58:39,983 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 203 states, 203 states have (on average 1.0344827586206897) internal successors, (210), 202 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:40,680 INFO L93 Difference]: Finished difference Result 260 states and 364 transitions. [2022-11-19 06:58:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-19 06:58:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0344827586206897) internal successors, (210), 202 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-19 06:58:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:40,682 INFO L225 Difference]: With dead ends: 260 [2022-11-19 06:58:40,682 INFO L226 Difference]: Without dead ends: 231 [2022-11-19 06:58:40,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=20530, Invalid=22942, Unknown=0, NotChecked=0, Total=43472 [2022-11-19 06:58:40,687 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:40,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:58:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-19 06:58:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-19 06:58:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-11-19 06:58:40,700 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 128 [2022-11-19 06:58:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:40,700 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-11-19 06:58:40,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0344827586206897) internal successors, (210), 202 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-11-19 06:58:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-11-19 06:58:40,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:40,704 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:40,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:40,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:58:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:40,913 INFO L85 PathProgramCache]: Analyzing trace with hash 609088308, now seen corresponding path program 10 times [2022-11-19 06:58:40,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:40,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98654113] [2022-11-19 06:58:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:40,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:59:08,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98654113] [2022-11-19 06:59:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98654113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843898253] [2022-11-19 06:59:08,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:59:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:08,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:08,712 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:08,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:59:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 3556 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-19 06:59:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:59:10,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 06:59:58,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843898253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:58,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574643099] [2022-11-19 06:59:58,591 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:59:58,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:58,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:58,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:58,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:58,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,631 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:59:58,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:59:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,678 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:59:58,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:59:58,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:59:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:58,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:58,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:58,834 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:59:58,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 06:59:59,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:59,075 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:59:59,076 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:59:59,145 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:00,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7896#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:00:00,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:00,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:00,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-19 07:00:00,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191506179] [2022-11-19 07:00:00,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:00,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-19 07:00:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-19 07:00:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81837, Invalid=86673, Unknown=0, NotChecked=0, Total=168510 [2022-11-19 07:00:00,249 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 405 states, 405 states have (on average 1.017283950617284) internal successors, (412), 404 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:02,811 INFO L93 Difference]: Finished difference Result 462 states and 667 transitions. [2022-11-19 07:00:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-19 07:00:02,812 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.017283950617284) internal successors, (412), 404 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-11-19 07:00:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:02,815 INFO L225 Difference]: With dead ends: 462 [2022-11-19 07:00:02,815 INFO L226 Difference]: Without dead ends: 433 [2022-11-19 07:00:02,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4418 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=81837, Invalid=86673, Unknown=0, NotChecked=0, Total=168510 [2022-11-19 07:00:02,823 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:02,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:00:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-19 07:00:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-19 07:00:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.0069444444444444) internal successors, (435), 432 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 435 transitions. [2022-11-19 07:00:02,852 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 435 transitions. Word has length 229 [2022-11-19 07:00:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:02,853 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 435 transitions. [2022-11-19 07:00:02,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.017283950617284) internal successors, (412), 404 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 435 transitions. [2022-11-19 07:00:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-11-19 07:00:02,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:02,869 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:02,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:03,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:00:03,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1169662676, now seen corresponding path program 11 times [2022-11-19 07:00:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:03,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976973792] [2022-11-19 07:00:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:01:59,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976973792] [2022-11-19 07:01:59,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976973792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390630217] [2022-11-19 07:01:59,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:59,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:59,727 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:59,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:02:04,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-19 07:02:04,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:02:04,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2022-11-19 07:02:08,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2022-11-19 07:02:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390630217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942857746] [2022-11-19 07:02:12,840 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:02:12,840 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:12,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:02:12,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:02:12,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:02:12,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,888 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:02:12,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:02:12,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:02:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:02:12,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:12,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:12,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:13,024 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:02:13,024 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 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:02:13,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:13,106 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:02:13,106 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:02:13,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:02:15,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12706#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:02:15,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:02:15,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:15,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-19 07:02:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477920598] [2022-11-19 07:02:15,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:15,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-19 07:02:15,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-19 07:02:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82964, Invalid=125428, Unknown=0, NotChecked=0, Total=208392 [2022-11-19 07:02:15,327 INFO L87 Difference]: Start difference. First operand 433 states and 435 transitions. Second operand has 451 states, 451 states have (on average 1.0199556541019956) internal successors, (460), 451 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:18,315 INFO L93 Difference]: Finished difference Result 487 states and 515 transitions. [2022-11-19 07:02:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-19 07:02:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0199556541019956) internal successors, (460), 451 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 431 [2022-11-19 07:02:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:18,318 INFO L225 Difference]: With dead ends: 487 [2022-11-19 07:02:18,319 INFO L226 Difference]: Without dead ends: 458 [2022-11-19 07:02:18,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1695 GetRequests, 1240 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21306 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=82964, Invalid=125428, Unknown=0, NotChecked=0, Total=208392 [2022-11-19 07:02:18,332 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:18,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:02:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-19 07:02:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2022-11-19 07:02:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.0065645514223194) internal successors, (460), 457 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 460 transitions. [2022-11-19 07:02:18,354 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 460 transitions. Word has length 431 [2022-11-19 07:02:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:18,355 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 460 transitions. [2022-11-19 07:02:18,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0199556541019956) internal successors, (460), 451 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 460 transitions. [2022-11-19 07:02:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-11-19 07:02:18,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:18,369 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:18,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:18,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:02:18,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:02:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1525902771, now seen corresponding path program 12 times [2022-11-19 07:02:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:18,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924691437] [2022-11-19 07:02:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-19 07:04:15,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924691437] [2022-11-19 07:04:15,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924691437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646385127] [2022-11-19 07:04:15,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:04:15,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:15,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:15,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:15,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:04:18,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:04:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 7103 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-19 07:04:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-19 07:04:19,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-19 07:07:42,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646385127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1740955918] [2022-11-19 07:07:42,733 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:07:42,733 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:07:42,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:07:42,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:07:42,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:07:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,778 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:07:42,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:07:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,824 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:07:42,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:07:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:07:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:42,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:07:42,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:07:42,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:07:42,988 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:07:42,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:07:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:07:43,206 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:07:43,206 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:07:43,277 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:07:45,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18126#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:07:45,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:07:45,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:07:45,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-19 07:07:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789556456] [2022-11-19 07:07:45,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:07:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-19 07:07:45,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:07:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-19 07:07:45,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328482, Invalid=338190, Unknown=0, NotChecked=0, Total=666672 [2022-11-19 07:07:45,420 INFO L87 Difference]: Start difference. First operand 458 states and 460 transitions. Second operand has 811 states, 811 states have (on average 1.0086313193588163) internal successors, (818), 810 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:02,069 INFO L93 Difference]: Finished difference Result 916 states and 1324 transitions. [2022-11-19 07:08:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-19 07:08:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0086313193588163) internal successors, (818), 810 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 456 [2022-11-19 07:08:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:02,075 INFO L225 Difference]: With dead ends: 916 [2022-11-19 07:08:02,075 INFO L226 Difference]: Without dead ends: 863 [2022-11-19 07:08:02,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1771 GetRequests, 956 SyntacticMatches, 0 SemanticMatches, 815 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8884 ImplicationChecksByTransitivity, 269.9s TimeCoverageRelationStatistics Valid=328482, Invalid=338190, Unknown=0, NotChecked=0, Total=666672 [2022-11-19 07:08:02,118 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:02,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:08:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-19 07:08:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-11-19 07:08:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.0034802784222738) internal successors, (865), 862 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 865 transitions. [2022-11-19 07:08:02,155 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 865 transitions. Word has length 456 [2022-11-19 07:08:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:02,156 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 865 transitions. [2022-11-19 07:08:02,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0086313193588163) internal successors, (818), 810 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 865 transitions. [2022-11-19 07:08:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2022-11-19 07:08:02,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:02,170 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:02,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1ef1f1-5375-4325-ac53-acff1e24023b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:02,392 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:08:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1039774516, now seen corresponding path program 13 times [2022-11-19 07:08:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:08:02,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800695380] [2022-11-19 07:08:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:02,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:08:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat