./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh --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 0397e1839c0d761fe403b06501425acc9e7bddc9f103e53ae177509d148aabf4 --- 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-2329fc7 [2022-12-14 12:31:26,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:31:26,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:31:26,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:31:26,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:31:26,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:31:26,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:31:26,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:31:26,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:31:26,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:31:26,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:31:26,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:31:26,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:31:26,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:31:26,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:31:26,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:31:26,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:31:26,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:31:26,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:31:26,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:31:26,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:31:26,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:31:26,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:31:26,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:31:26,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:31:26,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:31:26,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:31:26,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:31:26,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:31:26,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:31:26,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:31:26,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:31:26,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:31:26,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:31:26,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:31:26,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:31:26,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:31:26,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:31:26,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:31:26,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:31:26,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:31:26,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:31:26,436 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:31:26,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:31:26,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:31:26,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:31:26,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:31:26,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:31:26,437 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:31:26,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:31:26,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:31:26,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:31:26,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:31:26,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:31:26,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:31:26,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:31:26,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:31:26,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:31:26,444 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_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0397e1839c0d761fe403b06501425acc9e7bddc9f103e53ae177509d148aabf4 [2022-12-14 12:31:26,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:31:26,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:31:26,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:31:26,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:31:26,623 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:31:26,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops-crafted-1/nested3-2.c [2022-12-14 12:31:29,298 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:31:29,438 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:31:29,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/sv-benchmarks/c/loops-crafted-1/nested3-2.c [2022-12-14 12:31:29,443 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/data/fe0310fe7/fa54a82361e64c4eac7eef42afd3daeb/FLAGb6afe51df [2022-12-14 12:31:29,453 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/data/fe0310fe7/fa54a82361e64c4eac7eef42afd3daeb [2022-12-14 12:31:29,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:31:29,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:31:29,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:31:29,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:31:29,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:31:29,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36eccdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29, skipping insertion in model container [2022-12-14 12:31:29,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:31:29,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:31:29,597 WARN L237 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_fd2396aa-9d51-442d-affb-8488dd92ef4a/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2022-12-14 12:31:29,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:31:29,614 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:31:29,640 WARN L237 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_fd2396aa-9d51-442d-affb-8488dd92ef4a/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2022-12-14 12:31:29,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:31:29,653 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:31:29,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29 WrapperNode [2022-12-14 12:31:29,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:31:29,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:31:29,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:31:29,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:31:29,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,683 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-12-14 12:31:29,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:31:29,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:31:29,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:31:29,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:31:29,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,699 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:31:29,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:31:29,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:31:29,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:31:29,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (1/1) ... [2022-12-14 12:31:29,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:31:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:29,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:31:29,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:31:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:31:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:31:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:31:29,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:31:29,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:31:29,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:31:29,823 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:31:29,825 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:31:29,917 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:31:29,934 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:31:29,934 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 12:31:29,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:31:29 BoogieIcfgContainer [2022-12-14 12:31:29,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:31:29,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:31:29,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:31:29,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:31:29,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:31:29" (1/3) ... [2022-12-14 12:31:29,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dac3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:31:29, skipping insertion in model container [2022-12-14 12:31:29,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:29" (2/3) ... [2022-12-14 12:31:29,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dac3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:31:29, skipping insertion in model container [2022-12-14 12:31:29,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:31:29" (3/3) ... [2022-12-14 12:31:29,942 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2022-12-14 12:31:29,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:31:29,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:31:29,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:31:29,996 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;@74485516, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:31:29,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:31:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:31:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:31:30,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:30,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:31:30,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1453215626, now seen corresponding path program 1 times [2022-12-14 12:31:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986797636] [2022-12-14 12:31:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:30,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:30,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:30,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986797636] [2022-12-14 12:31:30,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986797636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:30,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:30,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:31:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732030036] [2022-12-14 12:31:30,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:30,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:30,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:30,224 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:30,270 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2022-12-14 12:31:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 12:31:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:30,280 INFO L225 Difference]: With dead ends: 40 [2022-12-14 12:31:30,280 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 12:31:30,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:30,286 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:30,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 12:31:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-12-14 12:31:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:31:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 12:31:30,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 6 [2022-12-14 12:31:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:30,323 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 12:31:30,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 12:31:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:31:30,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:30,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:30,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:31:30,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash 569943281, now seen corresponding path program 1 times [2022-12-14 12:31:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:30,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730593691] [2022-12-14 12:31:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:30,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730593691] [2022-12-14 12:31:30,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730593691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:30,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:30,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828956218] [2022-12-14 12:31:30,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:30,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:30,413 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:30,438 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-12-14 12:31:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:31:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:30,440 INFO L225 Difference]: With dead ends: 34 [2022-12-14 12:31:30,440 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 12:31:30,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:30,442 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:30,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 12:31:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-12-14 12:31:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:31:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 12:31:30,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2022-12-14 12:31:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:30,448 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 12:31:30,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 12:31:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:31:30,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:30,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:30,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:31:30,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash -935372046, now seen corresponding path program 1 times [2022-12-14 12:31:30,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:30,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539858698] [2022-12-14 12:31:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:30,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:30,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539858698] [2022-12-14 12:31:30,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539858698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:30,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:30,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668047789] [2022-12-14 12:31:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:30,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:30,541 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:30,558 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-12-14 12:31:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 12:31:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:30,559 INFO L225 Difference]: With dead ends: 34 [2022-12-14 12:31:30,559 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:31:30,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:30,561 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:30,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:31:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-12-14 12:31:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:31:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 12:31:30,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2022-12-14 12:31:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:30,566 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 12:31:30,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 12:31:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:31:30,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:30,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:30,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:31:30,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash -67368375, now seen corresponding path program 1 times [2022-12-14 12:31:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543954706] [2022-12-14 12:31:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:30,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:30,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:30,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543954706] [2022-12-14 12:31:30,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543954706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:30,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433614248] [2022-12-14 12:31:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:30,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:30,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:30,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:30,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:31:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:31:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:30,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:30,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433614248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:30,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634823397] [2022-12-14 12:31:30,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:31:30,744 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:30,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:30,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:30,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:30,879 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 12:31:30,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:31,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '328#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:31,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:31,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:31,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 12:31:31,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686647545] [2022-12-14 12:31:31,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:31:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:31,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:31:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:31:31,065 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:31,109 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-12-14 12:31:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:31:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:31:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:31,111 INFO L225 Difference]: With dead ends: 38 [2022-12-14 12:31:31,111 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 12:31:31,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:31:31,112 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:31,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 12:31:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-12-14 12:31:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:31:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 12:31:31,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2022-12-14 12:31:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:31,118 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 12:31:31,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 12:31:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:31:31,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:31,119 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:31,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:31:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:31,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash 698087602, now seen corresponding path program 2 times [2022-12-14 12:31:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:31,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702024392] [2022-12-14 12:31:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:31,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702024392] [2022-12-14 12:31:31,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702024392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873980227] [2022-12-14 12:31:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:31:31,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:31,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:31,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:31,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:31:31,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:31:31,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:31:31,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:31,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:31,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873980227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226396954] [2022-12-14 12:31:31,581 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:31:31,581 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:31,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:31,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:31,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:31,639 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 12:31:31,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:31,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:31,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:31,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:31,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 12:31:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705409729] [2022-12-14 12:31:31,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:31,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:31:31,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:31:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:31:31,856 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:32,224 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-12-14 12:31:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:31:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 12:31:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:32,225 INFO L225 Difference]: With dead ends: 47 [2022-12-14 12:31:32,225 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 12:31:32,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:31:32,226 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:32,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 90 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 12:31:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-14 12:31:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:31:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-12-14 12:31:32,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2022-12-14 12:31:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:32,233 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-12-14 12:31:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-12-14 12:31:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 12:31:32,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:32,234 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:32,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 12:31:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:32,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2015313582, now seen corresponding path program 3 times [2022-12-14 12:31:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:32,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303903737] [2022-12-14 12:31:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:32,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:32,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303903737] [2022-12-14 12:31:32,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303903737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12449054] [2022-12-14 12:31:32,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:31:32,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:32,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:32,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:31:32,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:31:32,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:31:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:32,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:32,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12449054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:32,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980567256] [2022-12-14 12:31:32,963 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:31:32,963 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:32,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:32,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:32,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:33,020 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 12:31:33,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:33,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '776#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:33,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:33,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:33,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-14 12:31:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968706002] [2022-12-14 12:31:33,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 12:31:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 12:31:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:31:33,298 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:38,576 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-12-14 12:31:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:31:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 12:31:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:38,577 INFO L225 Difference]: With dead ends: 65 [2022-12-14 12:31:38,577 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 12:31:38,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:31:38,578 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:38,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 167 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 12:31:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-12-14 12:31:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:31:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-12-14 12:31:38,583 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 18 [2022-12-14 12:31:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:38,583 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-12-14 12:31:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-12-14 12:31:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:31:38,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:38,583 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:38,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:31:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:38,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1735300462, now seen corresponding path program 4 times [2022-12-14 12:31:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:38,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831069574] [2022-12-14 12:31:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:38,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:39,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831069574] [2022-12-14 12:31:39,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831069574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399489662] [2022-12-14 12:31:39,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:31:39,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:39,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:39,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:39,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:31:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:39,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 12:31:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:39,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:40,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399489662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:40,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621018122] [2022-12-14 12:31:40,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:31:40,196 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:40,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:40,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:40,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:40,241 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 12:31:40,254 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:40,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1210#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:40,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:40,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:40,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-14 12:31:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213309089] [2022-12-14 12:31:40,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:40,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 12:31:40,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 12:31:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=2258, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 12:31:40,722 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:40,054 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2022-12-14 12:33:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 12:33:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 12:33:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:40,056 INFO L225 Difference]: With dead ends: 101 [2022-12-14 12:33:40,056 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 12:33:40,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 120.5s TimeCoverageRelationStatistics Valid=1811, Invalid=4040, Unknown=1, NotChecked=0, Total=5852 [2022-12-14 12:33:40,060 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:40,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 312 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:33:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 12:33:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-12-14 12:33:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:33:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-12-14 12:33:40,071 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 30 [2022-12-14 12:33:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:40,071 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-12-14 12:33:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-12-14 12:33:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:33:40,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:40,073 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:40,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:33:40,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:40,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash 820452626, now seen corresponding path program 5 times [2022-12-14 12:33:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:40,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189792619] [2022-12-14 12:33:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:33:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:33:41,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:33:41,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189792619] [2022-12-14 12:33:41,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189792619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:33:41,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909532172] [2022-12-14 12:33:41,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:33:41,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:41,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:33:41,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:33:41,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd2396aa-9d51-442d-affb-8488dd92ef4a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:33:42,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 12:33:42,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:33:42,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 12:33:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:33:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:33:42,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:33:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:33:56,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909532172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:33:56,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060393889] [2022-12-14 12:33:56,151 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:33:56,151 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:33:56,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:33:56,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:33:56,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:33:56,192 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 12:33:56,203 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:33:57,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1980#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:33:57,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:33:57,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:33:57,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-14 12:33:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580946699] [2022-12-14 12:33:57,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:33:57,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 12:33:57,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:33:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 12:33:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2606, Invalid=7900, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 12:33:57,675 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:00,283 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 39) 4294967296) 268435455)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 34) 4294967296) 268435455)) (.cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse22 (< (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse18 (< (mod (+ 35 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 268435455)) (.cse2 (< (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 268435455)) (.cse13 (< (mod (+ 40 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse3 (< (mod (+ 23 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse4 (< (mod (+ 22 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse6 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 28) 4294967296) 268435455)) (.cse21 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 43) 4294967296) 268435455)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 20) 4294967296) 268435455)) (.cse30 (< (mod (+ 21 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 12) 4294967296) 268435455)) (.cse31 (< (mod (+ 29 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse19 (< (mod (+ 30 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse17 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 33) 4294967296) 268435455)) (.cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse28 (< (mod (+ 41 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse20 (< (mod (+ 42 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse37 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 15) 4294967296) 268435455)) (.cse32 (< (mod (+ 44 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse41 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 45) 4294967296) 268435455)) (.cse9 (< (mod (+ 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse38 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 18) 4294967296) 268435455)) (.cse8 (< (mod (+ 19 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse33 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 26) 4294967296) 268435455)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 27) 4294967296) 268435455)) (.cse12 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 38) 4294967296) 268435455)) (.cse24 (< (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse27 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 36) 4294967296) 268435455)) (.cse43 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 37) 4294967296) 268435455)) (.cse42 (< (mod (+ 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 11) 4294967296) 268435455)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 10) 4294967296) 268435455)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 13) 4294967296) 268435455)) (.cse36 (< (mod (+ 14 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse44 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 268435455)) (.cse45 (< (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse40 (< (mod (+ 16 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse39 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 17) 4294967296) 268435455)) (.cse26 (< (mod (+ 9 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296) 268435455)) (.cse29 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 24) 4294967296) 268435455)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 25) 4294967296) 268435455))) (and (or (not .cse0) .cse1) .cse2 (or .cse3 (not .cse4)) (or (not .cse5) .cse6) (or .cse7 (not .cse8)) (or (not .cse9) .cse10) (or .cse11 (not .cse12)) (or (not .cse11) .cse13) (or .cse14 (not .cse15)) (or .cse16 (not .cse17)) (or (not .cse16) .cse18) (or .cse0 (not .cse19)) (or (not .cse20) .cse21) (or .cse22 (not .cse23)) (or .cse24 (not .cse22)) (or .cse25 (not .cse26)) (or .cse27 (not .cse18)) (or .cse23 (not .cse2)) (or (not .cse13) .cse28) (or .cse29 (not .cse3)) (or .cse4 (not .cse30)) (or (not .cse6) .cse31) (or (not .cse21) .cse32) (or .cse33 (not .cse34)) (or (not .cse7) .cse30) (or .cse35 (not .cse14)) (or (not .cse36) .cse37) (or (not .cse31) .cse19) (or .cse17 (not .cse1)) (or .cse38 (not .cse39)) (or (not .cse28) .cse20) (or .cse40 (not .cse37)) (or .cse41 (not .cse32)) (or (not .cse41) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 46) 4294967296) 268435455)) (or (not .cse42) .cse9) (or (not .cse38) .cse8) (or (not .cse33) .cse5) (or .cse12 (not .cse43)) (or .cse44 (not .cse24)) (or (not .cse27) .cse43) (or .cse42 (not .cse45)) (or .cse15 (not .cse25)) (or (not .cse35) .cse36) (or (not .cse44) .cse45) (or (not .cse40) .cse39) (or .cse26 (not .cse10)) (or (not .cse29) .cse34))) is different from false [2022-12-14 12:37:05,248 WARN L233 SmtUtils]: Spent 2.30m on a formula simplification. DAG size of input: 276 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:40:17,407 WARN L233 SmtUtils]: Spent 2.33m on a formula simplification. DAG size of input: 270 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:43:35,561 WARN L233 SmtUtils]: Spent 2.49m on a formula simplification. DAG size of input: 264 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:43:37,575 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 39) 4294967296) 268435455)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 34) 4294967296) 268435455)) (.cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse20 (< (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse18 (< (mod (+ 35 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse21 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 268435455)) (.cse2 (< (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 268435455)) (.cse13 (< (mod (+ 40 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse3 (< (mod (+ 23 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse4 (< (mod (+ 22 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse6 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 28) 4294967296) 268435455)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 20) 4294967296) 268435455)) (.cse28 (< (mod (+ 21 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 12) 4294967296) 268435455)) (.cse29 (< (mod (+ 29 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse19 (< (mod (+ 30 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse17 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 33) 4294967296) 268435455)) (.cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse26 (< (mod (+ 41 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 15) 4294967296) 268435455)) (.cse9 (< (mod (+ 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 18) 4294967296) 268435455)) (.cse8 (< (mod (+ 19 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse30 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 26) 4294967296) 268435455)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 27) 4294967296) 268435455)) (.cse12 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 38) 4294967296) 268435455)) (.cse22 (< (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 36) 4294967296) 268435455)) (.cse39 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 37) 4294967296) 268435455)) (.cse38 (< (mod (+ 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 11) 4294967296) 268435455)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 10) 4294967296) 268435455)) (.cse32 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 13) 4294967296) 268435455)) (.cse33 (< (mod (+ 14 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse40 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 268435455)) (.cse41 (< (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse37 (< (mod (+ 16 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse36 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 17) 4294967296) 268435455)) (.cse24 (< (mod (+ 9 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296) 268435455)) (.cse27 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 24) 4294967296) 268435455)) (.cse31 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 25) 4294967296) 268435455))) (and (or (not .cse0) .cse1) .cse2 (or .cse3 (not .cse4)) (or (not .cse5) .cse6) (or .cse7 (not .cse8)) (or (not .cse9) .cse10) (or .cse11 (not .cse12)) (or (not .cse11) .cse13) (or .cse14 (not .cse15)) (or .cse16 (not .cse17)) (or (not .cse16) .cse18) (or .cse0 (not .cse19)) (or .cse20 (not .cse21)) (or .cse22 (not .cse20)) (or .cse23 (not .cse24)) (or .cse25 (not .cse18)) (or .cse21 (not .cse2)) (or (not .cse13) .cse26) (or .cse27 (not .cse3)) (or .cse4 (not .cse28)) (or (not .cse6) .cse29) (or .cse30 (not .cse31)) (or (not .cse7) .cse28) (or .cse32 (not .cse14)) (or (not .cse33) .cse34) (or (not .cse29) .cse19) (or .cse17 (not .cse1)) (or .cse35 (not .cse36)) (or (not .cse26) (< (mod (+ 42 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (or .cse37 (not .cse34)) (or (not .cse38) .cse9) (or (not .cse35) .cse8) (or (not .cse30) .cse5) (or .cse12 (not .cse39)) (or .cse40 (not .cse22)) (or (not .cse25) .cse39) (or .cse38 (not .cse41)) (or .cse15 (not .cse23)) (or (not .cse32) .cse33) (or (not .cse40) .cse41) (or (not .cse37) .cse36) (or .cse24 (not .cse10)) (or (not .cse27) .cse31))) is different from false [2022-12-14 12:43:39,588 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 39) 4294967296) 268435455)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 34) 4294967296) 268435455)) (.cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse20 (< (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse18 (< (mod (+ 35 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse21 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 268435455)) (.cse2 (< (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 268435455)) (.cse13 (< (mod (+ 40 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse3 (< (mod (+ 23 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse4 (< (mod (+ 22 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse6 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 28) 4294967296) 268435455)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 20) 4294967296) 268435455)) (.cse27 (< (mod (+ 21 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 12) 4294967296) 268435455)) (.cse28 (< (mod (+ 29 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse19 (< (mod (+ 30 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse17 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 33) 4294967296) 268435455)) (.cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse33 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 15) 4294967296) 268435455)) (.cse9 (< (mod (+ 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 18) 4294967296) 268435455)) (.cse8 (< (mod (+ 19 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse29 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 26) 4294967296) 268435455)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 27) 4294967296) 268435455)) (.cse12 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 38) 4294967296) 268435455)) (.cse22 (< (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 36) 4294967296) 268435455)) (.cse38 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 37) 4294967296) 268435455)) (.cse37 (< (mod (+ 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 11) 4294967296) 268435455)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 10) 4294967296) 268435455)) (.cse31 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 13) 4294967296) 268435455)) (.cse32 (< (mod (+ 14 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse39 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 268435455)) (.cse40 (< (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse36 (< (mod (+ 16 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 17) 4294967296) 268435455)) (.cse24 (< (mod (+ 9 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296) 268435455)) (.cse26 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 24) 4294967296) 268435455)) (.cse30 (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 25) 4294967296) 268435455))) (and (or (not .cse0) .cse1) .cse2 (or .cse3 (not .cse4)) (or (not .cse5) .cse6) (or .cse7 (not .cse8)) (or (not .cse9) .cse10) (or .cse11 (not .cse12)) (or (not .cse11) .cse13) (or .cse14 (not .cse15)) (or .cse16 (not .cse17)) (or (not .cse16) .cse18) (or .cse0 (not .cse19)) (or .cse20 (not .cse21)) (or .cse22 (not .cse20)) (or .cse23 (not .cse24)) (or .cse25 (not .cse18)) (or .cse21 (not .cse2)) (or (not .cse13) (< (mod (+ 41 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455)) (or .cse26 (not .cse3)) (or .cse4 (not .cse27)) (or (not .cse6) .cse28) (or .cse29 (not .cse30)) (or (not .cse7) .cse27) (or .cse31 (not .cse14)) (or (not .cse32) .cse33) (or (not .cse28) .cse19) (or .cse17 (not .cse1)) (or .cse34 (not .cse35)) (or .cse36 (not .cse33)) (or (not .cse37) .cse9) (or (not .cse34) .cse8) (or (not .cse29) .cse5) (or .cse12 (not .cse38)) (or .cse39 (not .cse22)) (or (not .cse25) .cse38) (or .cse37 (not .cse40)) (or .cse15 (not .cse23)) (or (not .cse31) .cse32) (or (not .cse39) .cse40) (or (not .cse36) .cse35) (or .cse24 (not .cse10)) (or (not .cse26) .cse30))) is different from false [2022-12-14 12:46:32,746 WARN L233 SmtUtils]: Spent 1.95m on a formula simplification. DAG size of input: 246 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)