./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:10:04,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:10:04,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:10:04,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:10:04,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:10:04,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:10:04,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:10:04,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:10:04,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:10:04,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:10:04,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:10:04,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:10:04,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:10:04,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:10:04,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:10:04,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:10:04,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:10:04,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:10:04,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:10:04,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:10:04,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:10:04,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:10:04,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:10:04,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:10:04,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:10:04,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:10:04,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:10:04,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:10:04,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:10:04,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:10:04,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:10:04,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:10:04,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:10:04,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:10:04,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:10:04,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:10:04,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:10:04,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:10:04,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:10:04,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:10:04,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:10:04,360 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:10:04,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:10:04,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:10:04,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:10:04,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:10:04,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:10:04,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:10:04,405 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:10:04,405 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:10:04,405 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:10:04,406 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:10:04,407 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:10:04,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:10:04,407 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:10:04,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:10:04,407 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:10:04,408 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:10:04,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:10:04,408 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:10:04,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:10:04,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:10:04,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:10:04,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:10:04,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:10:04,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:10:04,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:10:04,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:10:04,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:10:04,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:10:04,412 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:10:04,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:10:04,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:10:04,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:10:04,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:04,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:10:04,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:10:04,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:10:04,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:10:04,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:10:04,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:10:04,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:10:04,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:10:04,415 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_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a [2022-11-19 07:10:04,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:10:04,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:10:04,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:10:04,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:10:04,718 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:10:04,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-11-19 07:10:04,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/data/e075fc03c/945e0f91e7f642fdbf224ce62f281fce/FLAGc1c0c977d [2022-11-19 07:10:05,460 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:10:05,461 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-11-19 07:10:05,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/data/e075fc03c/945e0f91e7f642fdbf224ce62f281fce/FLAGc1c0c977d [2022-11-19 07:10:05,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/data/e075fc03c/945e0f91e7f642fdbf224ce62f281fce [2022-11-19 07:10:05,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:10:05,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:10:05,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:05,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:10:05,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:10:05,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:05" (1/1) ... [2022-11-19 07:10:05,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eabdb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:05, skipping insertion in model container [2022-11-19 07:10:05,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:05" (1/1) ... [2022-11-19 07:10:05,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:10:05,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:10:06,373 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-11-19 07:10:06,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:06,407 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:10:06,753 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-11-19 07:10:06,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:06,777 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:10:06,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06 WrapperNode [2022-11-19 07:10:06,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:06,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:06,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:10:06,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:10:06,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:06,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:06,928 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-19 07:10:06,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:06,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:10:06,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:10:06,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:10:06,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:06,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:06,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:06,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:06,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:07,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:07,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:07,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:07,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:10:07,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:10:07,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:10:07,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:10:07,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (1/1) ... [2022-11-19 07:10:07,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:07,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:07,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:10:07,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:10:07,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:10:07,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:10:07,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:10:07,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:10:07,239 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:10:07,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:10:09,477 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:10:09,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:10:09,892 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:10:09,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:10:09 BoogieIcfgContainer [2022-11-19 07:10:09,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:10:09,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:10:09,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:10:09,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:10:09,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:10:05" (1/3) ... [2022-11-19 07:10:09,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ea46f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:10:09, skipping insertion in model container [2022-11-19 07:10:09,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:06" (2/3) ... [2022-11-19 07:10:09,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ea46f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:10:09, skipping insertion in model container [2022-11-19 07:10:09,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:10:09" (3/3) ... [2022-11-19 07:10:09,906 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2022-11-19 07:10:09,926 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:10:09,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:10:10,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:10:10,018 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;@2dea3149, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:10:10,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:10:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:10:10,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:10,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:10,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash 209354234, now seen corresponding path program 1 times [2022-11-19 07:10:10,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:10,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269527084] [2022-11-19 07:10:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:10,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:10,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:10,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269527084] [2022-11-19 07:10:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269527084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:10,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:10,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690532828] [2022-11-19 07:10:10,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:10,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:10,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:10,929 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:12,040 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-19 07:10:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-19 07:10:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:12,055 INFO L225 Difference]: With dead ends: 440 [2022-11-19 07:10:12,055 INFO L226 Difference]: Without dead ends: 289 [2022-11-19 07:10:12,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:12,062 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 16 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:12,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 99 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:10:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-19 07:10:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-19 07:10:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.6041666666666667) internal successors, (462), 288 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 462 transitions. [2022-11-19 07:10:12,115 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 462 transitions. Word has length 143 [2022-11-19 07:10:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:12,116 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 462 transitions. [2022-11-19 07:10:12,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 462 transitions. [2022-11-19 07:10:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-19 07:10:12,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:12,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:10:12,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1094394521, now seen corresponding path program 1 times [2022-11-19 07:10:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:12,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816410457] [2022-11-19 07:10:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:12,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:12,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816410457] [2022-11-19 07:10:12,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816410457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:12,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:12,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:12,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407417613] [2022-11-19 07:10:12,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:12,415 INFO L87 Difference]: Start difference. First operand 289 states and 462 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:13,336 INFO L93 Difference]: Finished difference Result 863 states and 1383 transitions. [2022-11-19 07:10:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-19 07:10:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:13,340 INFO L225 Difference]: With dead ends: 863 [2022-11-19 07:10:13,340 INFO L226 Difference]: Without dead ends: 575 [2022-11-19 07:10:13,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:13,343 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:13,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:10:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-19 07:10:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-19 07:10:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5609756097560976) internal successors, (896), 574 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 896 transitions. [2022-11-19 07:10:13,391 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 896 transitions. Word has length 151 [2022-11-19 07:10:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:13,391 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 896 transitions. [2022-11-19 07:10:13,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 896 transitions. [2022-11-19 07:10:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 07:10:13,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:13,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:13,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:10:13,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -316844002, now seen corresponding path program 1 times [2022-11-19 07:10:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:13,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927271107] [2022-11-19 07:10:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:13,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:10:14,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:14,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927271107] [2022-11-19 07:10:14,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927271107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:14,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:14,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748525554] [2022-11-19 07:10:14,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:10:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:10:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:14,327 INFO L87 Difference]: Start difference. First operand 575 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:15,422 INFO L93 Difference]: Finished difference Result 1290 states and 2054 transitions. [2022-11-19 07:10:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:10:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-19 07:10:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:15,426 INFO L225 Difference]: With dead ends: 1290 [2022-11-19 07:10:15,426 INFO L226 Difference]: Without dead ends: 575 [2022-11-19 07:10:15,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:15,429 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 220 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:15,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 11 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:10:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-19 07:10:15,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-19 07:10:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3745644599303135) internal successors, (789), 574 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 789 transitions. [2022-11-19 07:10:15,449 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 789 transitions. Word has length 158 [2022-11-19 07:10:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:15,450 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 789 transitions. [2022-11-19 07:10:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 789 transitions. [2022-11-19 07:10:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-19 07:10:15,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:15,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:15,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:10:15,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash -13278496, now seen corresponding path program 1 times [2022-11-19 07:10:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:15,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064707031] [2022-11-19 07:10:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:15,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064707031] [2022-11-19 07:10:15,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064707031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:15,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:15,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:15,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147008366] [2022-11-19 07:10:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:16,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:16,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:16,004 INFO L87 Difference]: Start difference. First operand 575 states and 789 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:16,716 INFO L93 Difference]: Finished difference Result 1723 states and 2365 transitions. [2022-11-19 07:10:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-19 07:10:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:16,721 INFO L225 Difference]: With dead ends: 1723 [2022-11-19 07:10:16,722 INFO L226 Difference]: Without dead ends: 1149 [2022-11-19 07:10:16,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:16,724 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 21 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-19 07:10:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-11-19 07:10:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.3490401396160558) internal successors, (1546), 1146 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1546 transitions. [2022-11-19 07:10:16,755 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1546 transitions. Word has length 171 [2022-11-19 07:10:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:16,756 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1546 transitions. [2022-11-19 07:10:16,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1546 transitions. [2022-11-19 07:10:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-19 07:10:16,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:16,760 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:16,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:10:16,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 10696099, now seen corresponding path program 1 times [2022-11-19 07:10:16,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:16,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032169265] [2022-11-19 07:10:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:17,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:17,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032169265] [2022-11-19 07:10:17,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032169265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:17,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:17,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:17,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982580324] [2022-11-19 07:10:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:17,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:10:17,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:10:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:17,653 INFO L87 Difference]: Start difference. First operand 1147 states and 1546 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:18,850 INFO L93 Difference]: Finished difference Result 3006 states and 4062 transitions. [2022-11-19 07:10:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:10:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-11-19 07:10:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:18,857 INFO L225 Difference]: With dead ends: 3006 [2022-11-19 07:10:18,857 INFO L226 Difference]: Without dead ends: 1719 [2022-11-19 07:10:18,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:18,866 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:18,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 69 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:10:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-19 07:10:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-19 07:10:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.3329452852153667) internal successors, (2290), 1718 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2290 transitions. [2022-11-19 07:10:18,916 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2290 transitions. Word has length 174 [2022-11-19 07:10:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:18,918 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2290 transitions. [2022-11-19 07:10:18,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2290 transitions. [2022-11-19 07:10:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-19 07:10:18,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:18,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:18,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:10:18,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:18,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1441045118, now seen corresponding path program 1 times [2022-11-19 07:10:18,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:18,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238652294] [2022-11-19 07:10:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:19,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:19,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238652294] [2022-11-19 07:10:19,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238652294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22128292] [2022-11-19 07:10:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:19,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:19,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:19,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:10:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:10:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:10:20,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:10:20,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22128292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:20,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:10:20,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:10:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892052107] [2022-11-19 07:10:20,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:20,129 INFO L87 Difference]: Start difference. First operand 1719 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:20,881 INFO L93 Difference]: Finished difference Result 4009 states and 5362 transitions. [2022-11-19 07:10:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-11-19 07:10:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:20,890 INFO L225 Difference]: With dead ends: 4009 [2022-11-19 07:10:20,891 INFO L226 Difference]: Without dead ends: 2291 [2022-11-19 07:10:20,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:20,900 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:20,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 186 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-19 07:10:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-11-19 07:10:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3231441048034935) internal successors, (3030), 2290 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3030 transitions. [2022-11-19 07:10:20,953 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3030 transitions. Word has length 181 [2022-11-19 07:10:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:20,955 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3030 transitions. [2022-11-19 07:10:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3030 transitions. [2022-11-19 07:10:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-19 07:10:20,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:20,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:20,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:10:21,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:21,167 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1296192757, now seen corresponding path program 1 times [2022-11-19 07:10:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92552678] [2022-11-19 07:10:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:21,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:10:21,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:21,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92552678] [2022-11-19 07:10:21,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92552678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:21,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:21,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450955773] [2022-11-19 07:10:21,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:21,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:21,385 INFO L87 Difference]: Start difference. First operand 2291 states and 3030 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:22,159 INFO L93 Difference]: Finished difference Result 6585 states and 8765 transitions. [2022-11-19 07:10:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-11-19 07:10:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:22,174 INFO L225 Difference]: With dead ends: 6585 [2022-11-19 07:10:22,174 INFO L226 Difference]: Without dead ends: 4295 [2022-11-19 07:10:22,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:22,178 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 165 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:22,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 64 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2022-11-19 07:10:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 4293. [2022-11-19 07:10:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.3059179869524697) internal successors, (5605), 4292 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5605 transitions. [2022-11-19 07:10:22,314 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5605 transitions. Word has length 183 [2022-11-19 07:10:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:22,314 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 5605 transitions. [2022-11-19 07:10:22,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5605 transitions. [2022-11-19 07:10:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-19 07:10:22,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:22,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:22,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:10:22,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1679027186, now seen corresponding path program 1 times [2022-11-19 07:10:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418199057] [2022-11-19 07:10:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:10:22,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:22,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418199057] [2022-11-19 07:10:22,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418199057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:22,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077398523] [2022-11-19 07:10:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:22,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:22,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:22,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:10:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:10:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:10:23,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:10:23,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077398523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:23,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:10:23,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:10:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059665919] [2022-11-19 07:10:23,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:23,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:23,040 INFO L87 Difference]: Start difference. First operand 4293 states and 5605 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:23,783 INFO L93 Difference]: Finished difference Result 10444 states and 13940 transitions. [2022-11-19 07:10:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:23,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2022-11-19 07:10:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:23,808 INFO L225 Difference]: With dead ends: 10444 [2022-11-19 07:10:23,808 INFO L226 Difference]: Without dead ends: 6152 [2022-11-19 07:10:23,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:23,814 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 150 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:23,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 224 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2022-11-19 07:10:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 6152. [2022-11-19 07:10:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 1.2302064704926028) internal successors, (7567), 6151 states have internal predecessors, (7567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 7567 transitions. [2022-11-19 07:10:23,973 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 7567 transitions. Word has length 185 [2022-11-19 07:10:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:23,973 INFO L495 AbstractCegarLoop]: Abstraction has 6152 states and 7567 transitions. [2022-11-19 07:10:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 7567 transitions. [2022-11-19 07:10:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-19 07:10:23,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:23,981 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:23,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:10:24,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:24,188 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash -683614312, now seen corresponding path program 1 times [2022-11-19 07:10:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374205634] [2022-11-19 07:10:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:24,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:10:24,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374205634] [2022-11-19 07:10:24,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374205634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:24,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109319070] [2022-11-19 07:10:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:24,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:24,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:24,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:24,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:10:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:10:24,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:10:25,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:10:25,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109319070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:25,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:10:25,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:10:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155392042] [2022-11-19 07:10:25,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:25,067 INFO L87 Difference]: Start difference. First operand 6152 states and 7567 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:25,945 INFO L93 Difference]: Finished difference Result 16593 states and 20325 transitions. [2022-11-19 07:10:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:25,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-11-19 07:10:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:25,997 INFO L225 Difference]: With dead ends: 16593 [2022-11-19 07:10:25,997 INFO L226 Difference]: Without dead ends: 10442 [2022-11-19 07:10:26,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:26,007 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:10:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2022-11-19 07:10:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10442. [2022-11-19 07:10:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10442 states, 10441 states have (on average 1.1952878076812565) internal successors, (12480), 10441 states have internal predecessors, (12480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 12480 transitions. [2022-11-19 07:10:26,233 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 12480 transitions. Word has length 191 [2022-11-19 07:10:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:26,233 INFO L495 AbstractCegarLoop]: Abstraction has 10442 states and 12480 transitions. [2022-11-19 07:10:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 12480 transitions. [2022-11-19 07:10:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-19 07:10:26,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:26,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:26,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:10:26,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:26,452 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1766432381, now seen corresponding path program 1 times [2022-11-19 07:10:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660295701] [2022-11-19 07:10:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:26,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660295701] [2022-11-19 07:10:26,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660295701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:26,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:26,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681895981] [2022-11-19 07:10:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:26,988 INFO L87 Difference]: Start difference. First operand 10442 states and 12480 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:27,769 INFO L93 Difference]: Finished difference Result 28607 states and 34075 transitions. [2022-11-19 07:10:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:27,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-11-19 07:10:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:27,804 INFO L225 Difference]: With dead ends: 28607 [2022-11-19 07:10:27,804 INFO L226 Difference]: Without dead ends: 18452 [2022-11-19 07:10:27,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:27,818 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:27,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 27 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18452 states. [2022-11-19 07:10:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18452 to 18450. [2022-11-19 07:10:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18450 states, 18449 states have (on average 1.183532982817497) internal successors, (21835), 18449 states have internal predecessors, (21835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18450 states to 18450 states and 21835 transitions. [2022-11-19 07:10:28,199 INFO L78 Accepts]: Start accepts. Automaton has 18450 states and 21835 transitions. Word has length 194 [2022-11-19 07:10:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:28,199 INFO L495 AbstractCegarLoop]: Abstraction has 18450 states and 21835 transitions. [2022-11-19 07:10:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 18450 states and 21835 transitions. [2022-11-19 07:10:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-19 07:10:28,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:28,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:10:28,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2143627689, now seen corresponding path program 1 times [2022-11-19 07:10:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56829343] [2022-11-19 07:10:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:28,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:10:28,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:28,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56829343] [2022-11-19 07:10:28,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56829343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:28,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:28,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:28,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773807445] [2022-11-19 07:10:28,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:28,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:28,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:28,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:28,735 INFO L87 Difference]: Start difference. First operand 18450 states and 21835 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:29,458 INFO L93 Difference]: Finished difference Result 37042 states and 43825 transitions. [2022-11-19 07:10:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-11-19 07:10:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:29,493 INFO L225 Difference]: With dead ends: 37042 [2022-11-19 07:10:29,493 INFO L226 Difference]: Without dead ends: 19022 [2022-11-19 07:10:29,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:29,509 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:29,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:10:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19022 states. [2022-11-19 07:10:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19022 to 19022. [2022-11-19 07:10:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19022 states, 19021 states have (on average 1.1800641396351401) internal successors, (22446), 19021 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19022 states to 19022 states and 22446 transitions. [2022-11-19 07:10:29,901 INFO L78 Accepts]: Start accepts. Automaton has 19022 states and 22446 transitions. Word has length 205 [2022-11-19 07:10:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:29,901 INFO L495 AbstractCegarLoop]: Abstraction has 19022 states and 22446 transitions. [2022-11-19 07:10:29,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 19022 states and 22446 transitions. [2022-11-19 07:10:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-19 07:10:29,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:29,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:29,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:10:29,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1334401191, now seen corresponding path program 1 times [2022-11-19 07:10:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625740946] [2022-11-19 07:10:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:30,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:30,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625740946] [2022-11-19 07:10:30,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625740946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:30,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:30,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:10:30,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354396138] [2022-11-19 07:10:30,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:30,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:30,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:30,381 INFO L87 Difference]: Start difference. First operand 19022 states and 22446 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:31,272 INFO L93 Difference]: Finished difference Result 44194 states and 52283 transitions. [2022-11-19 07:10:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:31,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-11-19 07:10:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:31,330 INFO L225 Difference]: With dead ends: 44194 [2022-11-19 07:10:31,330 INFO L226 Difference]: Without dead ends: 26031 [2022-11-19 07:10:31,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:31,351 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:31,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 60 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2022-11-19 07:10:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 24456. [2022-11-19 07:10:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24456 states, 24455 states have (on average 1.1858924555305663) internal successors, (29001), 24455 states have internal predecessors, (29001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24456 states to 24456 states and 29001 transitions. [2022-11-19 07:10:32,056 INFO L78 Accepts]: Start accepts. Automaton has 24456 states and 29001 transitions. Word has length 218 [2022-11-19 07:10:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:32,062 INFO L495 AbstractCegarLoop]: Abstraction has 24456 states and 29001 transitions. [2022-11-19 07:10:32,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:10:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 24456 states and 29001 transitions. [2022-11-19 07:10:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-19 07:10:32,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:32,103 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:32,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:10:32,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1239370622, now seen corresponding path program 1 times [2022-11-19 07:10:32,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:32,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086355746] [2022-11-19 07:10:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:32,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 07:10:32,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086355746] [2022-11-19 07:10:32,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086355746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075345682] [2022-11-19 07:10:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:32,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:32,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:32,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:32,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:10:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:10:32,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:10:33,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:10:33,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075345682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017612632] [2022-11-19 07:10:33,600 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-19 07:10:33,600 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:10:33,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:10:33,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:10:33,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:10,166 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2022-11-19 07:21:12,394 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 98976 conjuctions. This might take some time... [2022-11-19 07:21:28,692 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 640 conjuctions. [2022-11-19 07:21:28,736 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2022-11-19 07:21:30,892 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 98976 conjuctions. This might take some time... [2022-11-19 07:21:47,448 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 640 conjuctions. [2022-11-19 07:21:50,051 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2022-11-19 07:21:52,258 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 98976 conjuctions. This might take some time... [2022-11-19 07:22:08,248 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 640 conjuctions. [2022-11-19 07:23:40,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:24:08,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '250795#(and (<= 26 ~z~0) (<= 5 ~e~0) (<= 25 ~y~0) (<= ~a0~0 1) (<= ~a7~0 0) (<= ~c~0 3) (= ~a26~0 1) (<= ~e~0 5) (<= 6 ~f~0) (<= 0 |#NULL.base|) (<= ~a1~0 1) (<= ~w~0 23) (<= ~u~0 21) (<= 1 ~a1~0) (<= 1 ~a16~0) (<= |ULTIMATE.start_calculate_output_~input#1| 6) (<= ~a10~0 1) (<= 1 |ULTIMATE.start_calculate_output_~input#1|) (<= |ULTIMATE.start_main_~input~0#1| 6) (<= ~a20~0 0) (<= 0 ~a7~0) (<= ~a9~0 1) (<= ~a4~0 1) (<= 0 ~a17~0) (<= 0 ~a23~0) (<= 0 ~a20~0) (<= ~a13~0 1) (= ~a5~0 1) (= ~a12~0 1) (<= 0 ~a14~0) (<= ~x~0 24) (<= ~b~0 2) (<= ~a2~0 0) (<= 1 ~a22~0) (<= 1 ~a4~0) (<= ~a21~0 1) (<= 3 ~c~0) (<= 1 ~a24~0) (<= 1 ~a0~0) (<= ~a28~0 1) (<= |ULTIMATE.start_calculate_output_#in~input#1| 6) (<= 1 ~a21~0) (<= 0 ~a19~0) (<= |#NULL.offset| 0) (<= ~v~0 22) (<= ~a15~0 1) (<= ~a22~0 1) (<= 1 |ULTIMATE.start_main_~input~0#1|) (<= ~a~0 1) (<= 4 ~d~0) (<= 0 ~a11~0) (<= 23 ~w~0) (<= ~a17~0 0) (<= ~a23~0 0) (<= ~a24~0 1) (<= ~z~0 26) (<= 21 ~u~0) (<= 2 ~b~0) (<= 0 (+ |ULTIMATE.start_main_~output~0#1| 1)) (<= 1 |ULTIMATE.start_calculate_output_#in~input#1|) (= ~a6~0 1) (<= 1 ~a9~0) (<= |#NULL.base| 0) (<= ~a8~0 0) (<= ~a14~0 0) (<= 1 ~a29~0) (<= ~y~0 25) (<= 1 ~a13~0) (<= 1 ~a28~0) (<= 1 ~a~0) (= ~a27~0 1) (<= 22 ~v~0) (not (= ~a11~0 1)) (<= 1 ~a10~0) (<= 0 ~a2~0) (<= 1 ~a15~0) (<= 0 |#NULL.offset|) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (= ~a3~0 0) (= ~a18~0 1) (<= ~a25~0 0) (<= ~a29~0 1) (<= 0 ~a8~0) (<= ~f~0 6) (<= ~a16~0 1) (<= 0 ~a25~0) (<= 24 ~x~0) (<= ~a19~0 0))' at error location [2022-11-19 07:24:08,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:24:08,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:24:08,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-19 07:24:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618741839] [2022-11-19 07:24:08,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:24:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:24:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:24:08,753 INFO L87 Difference]: Start difference. First operand 24456 states and 29001 transitions. Second operand has 6 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:13,154 INFO L93 Difference]: Finished difference Result 125136 states and 149955 transitions. [2022-11-19 07:24:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:24:13,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-11-19 07:24:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:13,310 INFO L225 Difference]: With dead ends: 125136 [2022-11-19 07:24:13,310 INFO L226 Difference]: Without dead ends: 101539 [2022-11-19 07:24:13,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 480 SyntacticMatches, 179 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:24:13,347 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1721 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:13,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1721 Valid, 174 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:24:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101539 states. [2022-11-19 07:24:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101539 to 97100. [2022-11-19 07:24:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97100 states, 97099 states have (on average 1.1628853026292754) internal successors, (112915), 97099 states have internal predecessors, (112915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97100 states to 97100 states and 112915 transitions. [2022-11-19 07:24:14,694 INFO L78 Accepts]: Start accepts. Automaton has 97100 states and 112915 transitions. Word has length 219 [2022-11-19 07:24:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:14,695 INFO L495 AbstractCegarLoop]: Abstraction has 97100 states and 112915 transitions. [2022-11-19 07:24:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 97100 states and 112915 transitions. [2022-11-19 07:24:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-19 07:24:14,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:14,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:14,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:14,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:14,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1167586045, now seen corresponding path program 1 times [2022-11-19 07:24:14,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:14,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718570471] [2022-11-19 07:24:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:14,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:16,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718570471] [2022-11-19 07:24:16,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718570471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223836270] [2022-11-19 07:24:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:16,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:16,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:16,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:24:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:16,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:16,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:24:16,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:16,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223836270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:16,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:16,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:24:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90625172] [2022-11-19 07:24:16,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:16,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:16,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:16,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:16,852 INFO L87 Difference]: Start difference. First operand 97100 states and 112915 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:18,332 INFO L93 Difference]: Finished difference Result 202064 states and 236744 transitions. [2022-11-19 07:24:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-11-19 07:24:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:18,493 INFO L225 Difference]: With dead ends: 202064 [2022-11-19 07:24:18,493 INFO L226 Difference]: Without dead ends: 105966 [2022-11-19 07:24:18,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:18,535 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:18,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:24:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105966 states. [2022-11-19 07:24:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105966 to 104250. [2022-11-19 07:24:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104250 states, 104249 states have (on average 1.1693157728131685) internal successors, (121900), 104249 states have internal predecessors, (121900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104250 states to 104250 states and 121900 transitions. [2022-11-19 07:24:20,568 INFO L78 Accepts]: Start accepts. Automaton has 104250 states and 121900 transitions. Word has length 243 [2022-11-19 07:24:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:20,569 INFO L495 AbstractCegarLoop]: Abstraction has 104250 states and 121900 transitions. [2022-11-19 07:24:20,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 104250 states and 121900 transitions. [2022-11-19 07:24:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-11-19 07:24:20,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:20,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:20,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:20,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:24:20,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash 832443512, now seen corresponding path program 1 times [2022-11-19 07:24:20,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561093689] [2022-11-19 07:24:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:20,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-19 07:24:21,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561093689] [2022-11-19 07:24:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561093689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:21,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:21,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:24:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652442551] [2022-11-19 07:24:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:21,834 INFO L87 Difference]: Start difference. First operand 104250 states and 121900 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:23,385 INFO L93 Difference]: Finished difference Result 233669 states and 272916 transitions. [2022-11-19 07:24:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2022-11-19 07:24:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:23,558 INFO L225 Difference]: With dead ends: 233669 [2022-11-19 07:24:23,558 INFO L226 Difference]: Without dead ends: 130421 [2022-11-19 07:24:23,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:23,612 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 92 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:23,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:24:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130421 states. [2022-11-19 07:24:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130421 to 129275. [2022-11-19 07:24:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129275 states, 129274 states have (on average 1.1604808391478565) internal successors, (150020), 129274 states have internal predecessors, (150020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129275 states to 129275 states and 150020 transitions. [2022-11-19 07:24:25,879 INFO L78 Accepts]: Start accepts. Automaton has 129275 states and 150020 transitions. Word has length 257 [2022-11-19 07:24:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:25,880 INFO L495 AbstractCegarLoop]: Abstraction has 129275 states and 150020 transitions. [2022-11-19 07:24:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 129275 states and 150020 transitions. [2022-11-19 07:24:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-19 07:24:25,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:25,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:25,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:24:25,913 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash 185592765, now seen corresponding path program 1 times [2022-11-19 07:24:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:25,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495592099] [2022-11-19 07:24:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:25,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 126 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-19 07:24:27,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495592099] [2022-11-19 07:24:27,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495592099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196679358] [2022-11-19 07:24:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:27,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:27,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:27,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:24:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:27,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:24:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-19 07:24:27,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:27,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196679358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:27,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:27,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:24:27,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586339336] [2022-11-19 07:24:27,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:27,657 INFO L87 Difference]: Start difference. First operand 129275 states and 150020 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:29,477 INFO L93 Difference]: Finished difference Result 301163 states and 349363 transitions. [2022-11-19 07:24:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2022-11-19 07:24:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:29,697 INFO L225 Difference]: With dead ends: 301163 [2022-11-19 07:24:29,697 INFO L226 Difference]: Without dead ends: 172890 [2022-11-19 07:24:29,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:29,757 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 88 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:29,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 82 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:24:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172890 states. [2022-11-19 07:24:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172890 to 156016. [2022-11-19 07:24:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156016 states, 156015 states have (on average 1.1542479889754191) internal successors, (180080), 156015 states have internal predecessors, (180080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156016 states to 156016 states and 180080 transitions. [2022-11-19 07:24:33,078 INFO L78 Accepts]: Start accepts. Automaton has 156016 states and 180080 transitions. Word has length 264 [2022-11-19 07:24:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:33,079 INFO L495 AbstractCegarLoop]: Abstraction has 156016 states and 180080 transitions. [2022-11-19 07:24:33,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 156016 states and 180080 transitions. [2022-11-19 07:24:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-19 07:24:33,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:33,114 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:33,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:24:33,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:24:33,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1627790899, now seen corresponding path program 1 times [2022-11-19 07:24:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:33,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629371260] [2022-11-19 07:24:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:24:33,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629371260] [2022-11-19 07:24:33,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629371260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:33,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940422796] [2022-11-19 07:24:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:33,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8208333e-052d-4937-ab0d-8879ffc56e9b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:24:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:24:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:24:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:24:35,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940422796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555562323] [2022-11-19 07:24:35,097 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-19 07:24:35,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:24:35,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:24:35,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:24:35,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs