./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --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 4548c451706b7658e6a882e8eef66dc3c360e6aea0e4326d7cc0b87e2b58239c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:09:34,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:09:34,858 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:09:34,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:09:34,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:09:34,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:09:34,907 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:09:34,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:09:34,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:09:34,911 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:09:34,911 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:09:34,912 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:09:34,912 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:09:34,912 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:09:34,913 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:09:34,913 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:09:34,913 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:09:34,914 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:09:34,914 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:09:34,915 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:09:34,915 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:09:34,916 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:09:34,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:09:34,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:09:34,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:09:34,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:09:34,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:09:34,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:09:34,923 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:09:34,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:09:34,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:09:34,924 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:09:34,924 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:09:34,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:09:34,925 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:09:34,925 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:09:34,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:09:34,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:09:34,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:09:34,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:09:34,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:09:34,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:09:34,932 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:09:34,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:09:34,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:09:34,934 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:09:34,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:09:34,935 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4548c451706b7658e6a882e8eef66dc3c360e6aea0e4326d7cc0b87e2b58239c [2024-11-09 07:09:35,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:09:35,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:09:35,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:09:35,242 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:09:35,243 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:09:35,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c Unable to find full path for "g++" [2024-11-09 07:09:37,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:09:37,670 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:09:37,671 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c [2024-11-09 07:09:37,682 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/data/333c2146a/404db974cd9a48028eec760f83b6d35a/FLAG21a399ab0 [2024-11-09 07:09:37,701 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/data/333c2146a/404db974cd9a48028eec760f83b6d35a [2024-11-09 07:09:37,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:09:37,708 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:09:37,710 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:09:37,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:09:37,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:09:37,719 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:09:37" (1/1) ... [2024-11-09 07:09:37,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742dc972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:37, skipping insertion in model container [2024-11-09 07:09:37,722 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:09:37" (1/1) ... [2024-11-09 07:09:37,756 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:09:38,010 WARN L250 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_f202c45b-b848-45e8-8693-e90f2d406e7a/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c[318,331] [2024-11-09 07:09:38,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:09:38,038 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:09:38,052 WARN L250 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_f202c45b-b848-45e8-8693-e90f2d406e7a/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c[318,331] [2024-11-09 07:09:38,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:09:38,077 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:09:38,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38 WrapperNode [2024-11-09 07:09:38,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:09:38,079 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:09:38,079 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:09:38,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:09:38,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,116 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-09 07:09:38,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:09:38,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:09:38,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:09:38,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:09:38,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,133 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,139 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:09:38,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:09:38,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:09:38,142 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:09:38,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (1/1) ... [2024-11-09 07:09:38,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:09:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:38,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:09:38,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:09:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:09:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:09:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:09:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:09:38,284 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:09:38,286 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:09:38,425 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-09 07:09:38,425 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:09:38,471 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:09:38,472 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:09:38,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:09:38 BoogieIcfgContainer [2024-11-09 07:09:38,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:09:38,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:09:38,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:09:38,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:09:38,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:09:37" (1/3) ... [2024-11-09 07:09:38,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118c7a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:09:38, skipping insertion in model container [2024-11-09 07:09:38,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:38" (2/3) ... [2024-11-09 07:09:38,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118c7a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:09:38, skipping insertion in model container [2024-11-09 07:09:38,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:09:38" (3/3) ... [2024-11-09 07:09:38,485 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2024-11-09 07:09:38,508 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:09:38,508 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:09:38,589 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:09:38,598 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@64aebe3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:09:38,598 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:09:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:09:38,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:38,612 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:09:38,613 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:38,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2043421015, now seen corresponding path program 1 times [2024-11-09 07:09:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:38,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617814711] [2024-11-09 07:09:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:38,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:38,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617814711] [2024-11-09 07:09:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617814711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:09:38,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:09:38,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:09:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663079298] [2024-11-09 07:09:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:09:38,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:09:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:09:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:09:38,899 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-09 07:09:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:38,943 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2024-11-09 07:09:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:09:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2024-11-09 07:09:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:38,954 INFO L225 Difference]: With dead ends: 21 [2024-11-09 07:09:38,954 INFO L226 Difference]: Without dead ends: 11 [2024-11-09 07:09:38,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:09:38,962 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:38,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:09:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-09 07:09:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-09 07:09:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-11-09 07:09:39,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2024-11-09 07:09:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:39,007 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-11-09 07:09:39,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-09 07:09:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-11-09 07:09:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 07:09:39,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:39,010 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:39,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:09:39,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:39,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 980237501, now seen corresponding path program 1 times [2024-11-09 07:09:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:39,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928185090] [2024-11-09 07:09:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:39,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928185090] [2024-11-09 07:09:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928185090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92400959] [2024-11-09 07:09:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:39,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:39,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:39,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:09:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:39,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:09:39,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:39,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92400959] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:39,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:09:39,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2024-11-09 07:09:39,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675475496] [2024-11-09 07:09:39,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:09:39,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:09:39,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:09:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:09:39,643 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:39,678 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-11-09 07:09:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:09:39,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 07:09:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:39,683 INFO L225 Difference]: With dead ends: 16 [2024-11-09 07:09:39,683 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 07:09:39,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:09:39,687 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:39,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:09:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 07:09:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 07:09:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 07:09:39,696 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2024-11-09 07:09:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:39,697 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 07:09:39,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 07:09:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 07:09:39,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:39,700 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:39,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:39,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:39,901 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:39,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1206149858, now seen corresponding path program 1 times [2024-11-09 07:09:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:39,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314710009] [2024-11-09 07:09:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:40,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:40,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314710009] [2024-11-09 07:09:40,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314710009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:40,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705912480] [2024-11-09 07:09:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:40,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:40,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:40,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:09:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:40,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 07:09:40,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:40,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705912480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:40,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695516272] [2024-11-09 07:09:40,397 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:09:40,397 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:40,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:40,408 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:40,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:40,704 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:40,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '206#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:09:40,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:40,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-09 07:09:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81523550] [2024-11-09 07:09:40,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:40,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:09:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:09:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-09 07:09:40,813 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:40,862 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-11-09 07:09:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:09:40,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 07:09:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:40,864 INFO L225 Difference]: With dead ends: 22 [2024-11-09 07:09:40,864 INFO L226 Difference]: Without dead ends: 18 [2024-11-09 07:09:40,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-09 07:09:40,866 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:40,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:09:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-09 07:09:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-09 07:09:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-09 07:09:40,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2024-11-09 07:09:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:40,871 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-09 07:09:40,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-09 07:09:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 07:09:40,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:40,872 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:40,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:41,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:41,073 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:41,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash 301028817, now seen corresponding path program 2 times [2024-11-09 07:09:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:41,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435250727] [2024-11-09 07:09:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:09:41,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:41,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435250727] [2024-11-09 07:09:41,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435250727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:41,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085141057] [2024-11-09 07:09:41,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:09:41,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:41,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:41,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:41,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:09:41,265 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:09:41,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:41,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:09:41,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:09:41,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:09:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085141057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775413990] [2024-11-09 07:09:41,349 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:09:41,349 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:41,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:41,350 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:41,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:41,555 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:41,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:09:41,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:41,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:41,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 07:09:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527940849] [2024-11-09 07:09:41,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:41,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:09:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:09:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:09:41,655 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2024-11-09 07:09:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:41,698 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-09 07:09:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:09:41,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 16 [2024-11-09 07:09:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:41,699 INFO L225 Difference]: With dead ends: 36 [2024-11-09 07:09:41,700 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 07:09:41,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:09:41,701 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:41,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:09:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 07:09:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 07:09:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-09 07:09:41,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2024-11-09 07:09:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:41,707 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-09 07:09:41,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2024-11-09 07:09:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-09 07:09:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:09:41,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:41,709 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:41,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:09:41,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:41,910 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:41,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash 107296269, now seen corresponding path program 3 times [2024-11-09 07:09:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394775590] [2024-11-09 07:09:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:09:42,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:42,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394775590] [2024-11-09 07:09:42,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394775590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17928617] [2024-11-09 07:09:42,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:09:42,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:42,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:42,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:09:42,338 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:09:42,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:42,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:09:42,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:09:42,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:09:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17928617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:42,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141011818] [2024-11-09 07:09:42,730 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:09:42,731 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:42,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:42,732 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:42,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:42,894 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:43,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:09:43,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:43,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:43,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2024-11-09 07:09:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107246007] [2024-11-09 07:09:43,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:43,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:09:43,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:09:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2024-11-09 07:09:43,046 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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) [2024-11-09 07:09:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:43,276 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-11-09 07:09:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 07:09:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 22 [2024-11-09 07:09:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:43,278 INFO L225 Difference]: With dead ends: 51 [2024-11-09 07:09:43,279 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 07:09:43,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:09:43,280 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:43,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:09:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 07:09:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-09 07:09:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2024-11-09 07:09:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-09 07:09:43,288 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 22 [2024-11-09 07:09:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:43,289 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-09 07:09:43,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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) [2024-11-09 07:09:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-09 07:09:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 07:09:43,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:43,291 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:43,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:43,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:43,495 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:43,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 603583402, now seen corresponding path program 4 times [2024-11-09 07:09:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:43,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964829970] [2024-11-09 07:09:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:09:44,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964829970] [2024-11-09 07:09:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964829970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854266220] [2024-11-09 07:09:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:09:44,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:44,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:44,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:44,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:09:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:44,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:09:44,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:09:44,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:09:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854266220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:45,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658598268] [2024-11-09 07:09:45,072 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:09:45,072 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:45,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:45,074 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:45,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:45,207 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:45,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '982#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:09:45,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:45,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 07:09:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706864720] [2024-11-09 07:09:45,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:45,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 07:09:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 07:09:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2024-11-09 07:09:45,340 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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) [2024-11-09 07:09:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:45,471 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2024-11-09 07:09:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 07:09:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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 36 [2024-11-09 07:09:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:45,473 INFO L225 Difference]: With dead ends: 76 [2024-11-09 07:09:45,473 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 07:09:45,474 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2024-11-09 07:09:45,477 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:45,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:09:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 07:09:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-09 07:09:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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) [2024-11-09 07:09:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-09 07:09:45,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 36 [2024-11-09 07:09:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:45,496 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-09 07:09:45,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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) [2024-11-09 07:09:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-09 07:09:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 07:09:45,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:45,499 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:45,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:09:45,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:45,700 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:45,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1438847334, now seen corresponding path program 5 times [2024-11-09 07:09:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369674786] [2024-11-09 07:09:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:09:49,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:49,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369674786] [2024-11-09 07:09:49,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369674786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670328453] [2024-11-09 07:09:49,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:09:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:49,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:49,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:09:49,865 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-09 07:09:49,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:49,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 07:09:49,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:09:50,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:09:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670328453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [231133567] [2024-11-09 07:09:52,468 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:09:52,468 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:52,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:52,468 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:52,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:52,606 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:52,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1619#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:09:52,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:52,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 75 [2024-11-09 07:09:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238260832] [2024-11-09 07:09:52,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:52,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 07:09:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 07:09:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=5038, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 07:09:52,792 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 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) [2024-11-09 07:09:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:58,998 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2024-11-09 07:09:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 07:09:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 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 60 [2024-11-09 07:09:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:59,000 INFO L225 Difference]: With dead ends: 127 [2024-11-09 07:09:59,000 INFO L226 Difference]: Without dead ends: 112 [2024-11-09 07:09:59,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=4924, Invalid=11846, Unknown=0, NotChecked=0, Total=16770 [2024-11-09 07:09:59,007 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:59,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 37 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:09:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-09 07:09:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2024-11-09 07:09:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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) [2024-11-09 07:09:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2024-11-09 07:09:59,027 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 60 [2024-11-09 07:09:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:59,027 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2024-11-09 07:09:59,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 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) [2024-11-09 07:09:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2024-11-09 07:09:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 07:09:59,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:59,030 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:59,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:09:59,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:59,231 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:59,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash 535404383, now seen corresponding path program 6 times [2024-11-09 07:09:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604032939] [2024-11-09 07:09:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:59,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2152 backedges. 0 proven. 2152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:07,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604032939] [2024-11-09 07:10:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604032939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254834936] [2024-11-09 07:10:07,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:10:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:07,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:07,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:10:07,473 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:10:07,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:10:07,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 07:10:07,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2152 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:10:10,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2152 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:10:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254834936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76803477] [2024-11-09 07:10:16,399 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:10:16,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:16,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:16,400 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:16,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:16,501 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:16,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2876#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:10:16,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:16,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:16,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 48, 48] total 148 [2024-11-09 07:10:16,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189791807] [2024-11-09 07:10:16,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:16,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2024-11-09 07:10:16,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2024-11-09 07:10:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9355, Invalid=14515, Unknown=0, NotChecked=0, Total=23870 [2024-11-09 07:10:16,867 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 states have internal predecessors, (301), 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) [2024-11-09 07:10:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:21,115 INFO L93 Difference]: Finished difference Result 227 states and 277 transitions. [2024-11-09 07:10:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-09 07:10:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 states have internal predecessors, (301), 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 110 [2024-11-09 07:10:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:21,118 INFO L225 Difference]: With dead ends: 227 [2024-11-09 07:10:21,118 INFO L226 Difference]: Without dead ends: 210 [2024-11-09 07:10:21,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=14299, Invalid=26707, Unknown=0, NotChecked=0, Total=41006 [2024-11-09 07:10:21,126 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:21,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:10:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-09 07:10:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2024-11-09 07:10:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2024-11-09 07:10:21,157 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 110 [2024-11-09 07:10:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:21,158 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2024-11-09 07:10:21,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 states have internal predecessors, (301), 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) [2024-11-09 07:10:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2024-11-09 07:10:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-09 07:10:21,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:21,163 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:21,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:10:21,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:21,367 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:21,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:21,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1236660028, now seen corresponding path program 7 times [2024-11-09 07:10:21,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:21,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846306004] [2024-11-09 07:10:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:21,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8885 backedges. 0 proven. 8885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:49,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846306004] [2024-11-09 07:10:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846306004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663326274] [2024-11-09 07:10:49,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:10:49,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:49,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:49,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:49,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:10:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:50,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-09 07:10:50,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8885 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 07:11:00,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8885 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 07:11:22,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663326274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:22,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146972735] [2024-11-09 07:11:22,143 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:11:22,143 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:22,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:22,144 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:22,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:22,212 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:22,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5163#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:11:22,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:22,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 96, 96] total 293 [2024-11-09 07:11:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524726138] [2024-11-09 07:11:22,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:22,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 294 states [2024-11-09 07:11:22,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 294 interpolants. [2024-11-09 07:11:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37202, Invalid=52498, Unknown=0, NotChecked=0, Total=89700 [2024-11-09 07:11:22,887 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 294 states, 294 states have (on average 2.010204081632653) internal successors, (591), 293 states have internal predecessors, (591), 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) [2024-11-09 07:11:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:39,549 INFO L93 Difference]: Finished difference Result 423 states and 521 transitions. [2024-11-09 07:11:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2024-11-09 07:11:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 294 states, 294 states have (on average 2.010204081632653) internal successors, (591), 293 states have internal predecessors, (591), 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 208 [2024-11-09 07:11:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:39,553 INFO L225 Difference]: With dead ends: 423 [2024-11-09 07:11:39,553 INFO L226 Difference]: Without dead ends: 404 [2024-11-09 07:11:39,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17428 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=56402, Invalid=100018, Unknown=0, NotChecked=0, Total=156420 [2024-11-09 07:11:39,564 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 197 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:39,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 26 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:11:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-09 07:11:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 403. [2024-11-09 07:11:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.0049751243781095) internal successors, (404), 402 states have internal predecessors, (404), 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) [2024-11-09 07:11:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2024-11-09 07:11:39,633 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 208 [2024-11-09 07:11:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:39,633 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2024-11-09 07:11:39,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 294 states, 294 states have (on average 2.010204081632653) internal successors, (591), 293 states have internal predecessors, (591), 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) [2024-11-09 07:11:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2024-11-09 07:11:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2024-11-09 07:11:39,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:39,642 INFO L215 NwaCegarLoop]: trace histogram [190, 190, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:39,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:11:39,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:39,843 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:39,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash -358856535, now seen corresponding path program 8 times [2024-11-09 07:11:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:39,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263119106] [2024-11-09 07:11:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36164 backedges. 0 proven. 36164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:20,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263119106] [2024-11-09 07:14:20,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263119106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811834752] [2024-11-09 07:14:20,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:14:20,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:20,728 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:20,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:14:23,383 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 191 check-sat command(s) [2024-11-09 07:14:23,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:23,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-09 07:14:23,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36164 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 07:14:25,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36164 backedges. 0 proven. 36164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:40,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811834752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:15:40,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023985607] [2024-11-09 07:15:40,007 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:15:40,007 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:40,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:15:40,009 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:15:40,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:15:40,109 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:15:41,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9404#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:15:41,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:15:41,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:15:41,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [200, 192, 201] total 402 [2024-11-09 07:15:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12252942] [2024-11-09 07:15:41,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:41,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 403 states [2024-11-09 07:15:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 403 interpolants. [2024-11-09 07:15:41,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62984, Invalid=103888, Unknown=0, NotChecked=0, Total=166872 [2024-11-09 07:15:41,513 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand has 403 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 402 states have internal predecessors, (809), 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) [2024-11-09 07:15:58,320 WARN L286 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 1042 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:15:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:58,643 INFO L93 Difference]: Finished difference Result 447 states and 459 transitions. [2024-11-09 07:15:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-11-09 07:15:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 403 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 402 states have internal predecessors, (809), 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 402 [2024-11-09 07:15:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:58,649 INFO L225 Difference]: With dead ends: 447 [2024-11-09 07:15:58,649 INFO L226 Difference]: Without dead ends: 426 [2024-11-09 07:15:58,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1405 GetRequests, 997 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6863 ImplicationChecksByTransitivity, 101.2s TimeCoverageRelationStatistics Valid=63370, Invalid=104320, Unknown=0, NotChecked=0, Total=167690 [2024-11-09 07:15:58,662 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 285 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:58,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 388 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 07:15:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-09 07:15:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 425. [2024-11-09 07:15:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.0047169811320755) internal successors, (426), 424 states have internal predecessors, (426), 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) [2024-11-09 07:15:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 426 transitions. [2024-11-09 07:15:58,727 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 426 transitions. Word has length 402 [2024-11-09 07:15:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:58,728 INFO L471 AbstractCegarLoop]: Abstraction has 425 states and 426 transitions. [2024-11-09 07:15:58,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 403 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 402 states have internal predecessors, (809), 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) [2024-11-09 07:15:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 426 transitions. [2024-11-09 07:15:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2024-11-09 07:15:58,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:58,740 INFO L215 NwaCegarLoop]: trace histogram [191, 191, 18, 18, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:58,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:15:58,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:15:58,941 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:58,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1997452817, now seen corresponding path program 9 times [2024-11-09 07:15:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373415794] [2024-11-09 07:15:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36805 backedges. 0 proven. 36805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:06,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:06,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373415794] [2024-11-09 07:19:06,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373415794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:06,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448358303] [2024-11-09 07:19:06,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:19:06,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:06,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:06,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:06,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:19:06,748 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:19:06,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:19:06,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-09 07:19:06,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36805 backedges. 0 proven. 36481 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-09 07:19:49,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36805 backedges. 0 proven. 36481 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-09 07:21:23,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448358303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:23,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580956733] [2024-11-09 07:21:23,243 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 07:21:23,244 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:23,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:23,244 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:23,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:23,324 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:21:24,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13849#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 07:21:24,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:21:24,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:21:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [211, 193, 193] total 595 [2024-11-09 07:21:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856047155] [2024-11-09 07:21:24,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:21:24,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 596 states [2024-11-09 07:21:24,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 596 interpolants. [2024-11-09 07:21:24,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151891, Invalid=209911, Unknown=0, NotChecked=0, Total=361802 [2024-11-09 07:21:24,999 INFO L87 Difference]: Start difference. First operand 425 states and 426 transitions. Second operand has 596 states, 596 states have (on average 2.0050335570469797) internal successors, (1195), 595 states have internal predecessors, (1195), 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) [2024-11-09 07:22:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:55,942 INFO L93 Difference]: Finished difference Result 855 states and 1050 transitions. [2024-11-09 07:22:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2024-11-09 07:22:55,943 INFO L78 Accepts]: Start accepts. Automaton has has 596 states, 596 states have (on average 2.0050335570469797) internal successors, (1195), 595 states have internal predecessors, (1195), 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 424 [2024-11-09 07:22:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:55,948 INFO L225 Difference]: With dead ends: 855 [2024-11-09 07:22:55,948 INFO L226 Difference]: Without dead ends: 814 [2024-11-09 07:22:55,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1674 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 793 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67405 ImplicationChecksByTransitivity, 230.8s TimeCoverageRelationStatistics Valid=230056, Invalid=401174, Unknown=0, NotChecked=0, Total=631230 [2024-11-09 07:22:55,987 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 779 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:55,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 35 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 07:22:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2024-11-09 07:22:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 813. [2024-11-09 07:22:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.0024630541871922) internal successors, (814), 812 states have internal predecessors, (814), 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) [2024-11-09 07:22:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 814 transitions. [2024-11-09 07:22:56,111 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 814 transitions. Word has length 424 [2024-11-09 07:22:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:56,254 INFO L471 AbstractCegarLoop]: Abstraction has 813 states and 814 transitions. [2024-11-09 07:22:56,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 596 states, 596 states have (on average 2.0050335570469797) internal successors, (1195), 595 states have internal predecessors, (1195), 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) [2024-11-09 07:22:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 814 transitions. [2024-11-09 07:22:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2024-11-09 07:22:56,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:56,264 INFO L215 NwaCegarLoop]: trace histogram [384, 384, 19, 19, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:56,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 07:22:56,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202c45b-b848-45e8-8693-e90f2d406e7a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:56,465 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:56,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1998601896, now seen corresponding path program 10 times [2024-11-09 07:22:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:56,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784289371] [2024-11-09 07:22:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat