./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.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_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/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_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/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_a7a06657-177d-455e-a3c4-4e058746693d/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 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:58:05,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:58:05,700 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:58:05,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:58:05,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:58:05,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:58:05,765 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:58:05,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:58:05,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:58:05,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:58:05,767 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:58:05,768 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:58:05,768 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:58:05,771 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:58:05,771 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:58:05,772 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:58:05,772 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:58:05,776 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:58:05,777 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:58:05,777 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:58:05,778 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:58:05,779 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:58:05,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:58:05,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:58:05,784 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:58:05,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:58:05,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:58:05,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:58:05,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:58:05,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:58:05,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:58:05,789 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:58:05,789 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:58:05,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:58:05,790 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:58:05,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:58:05,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:58:05,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:58:05,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:58:05,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:58:05,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:58:05,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:58:05,795 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:58:05,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:58:05,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:58:05,796 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:58:05,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:58:05,797 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_a7a06657-177d-455e-a3c4-4e058746693d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 [2024-11-09 05:58:06,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:58:06,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:58:06,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:58:06,185 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:58:06,186 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:58:06,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c Unable to find full path for "g++" [2024-11-09 05:58:08,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:58:08,911 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:58:08,913 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2024-11-09 05:58:08,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/data/d46ef6e88/acfe1fba7aef4c818e9f6eabeb8f01b7/FLAG0b641c492 [2024-11-09 05:58:09,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/data/d46ef6e88/acfe1fba7aef4c818e9f6eabeb8f01b7 [2024-11-09 05:58:09,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:58:09,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:58:09,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:58:09,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:58:09,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:58:09,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1007b726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09, skipping insertion in model container [2024-11-09 05:58:09,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,296 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:58:09,534 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_a7a06657-177d-455e-a3c4-4e058746693d/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c[538,551] [2024-11-09 05:58:09,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:58:09,585 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:58:09,602 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_a7a06657-177d-455e-a3c4-4e058746693d/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c[538,551] [2024-11-09 05:58:09,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:58:09,646 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:58:09,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09 WrapperNode [2024-11-09 05:58:09,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:58:09,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:58:09,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:58:09,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:58:09,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,713 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-09 05:58:09,718 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:58:09,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:58:09,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:58:09,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:58:09,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:58:09,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:58:09,750 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:58:09,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:58:09,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (1/1) ... [2024-11-09 05:58:09,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:58:09,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:09,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:58:09,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:58:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:58:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 05:58:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 05:58:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:58:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:58:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:58:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 05:58:09,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 05:58:09,947 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:58:09,950 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:58:10,303 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 05:58:10,303 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:58:10,392 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:58:10,392 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 05:58:10,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:58:10 BoogieIcfgContainer [2024-11-09 05:58:10,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:58:10,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:58:10,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:58:10,405 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:58:10,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:58:09" (1/3) ... [2024-11-09 05:58:10,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3100e8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:58:10, skipping insertion in model container [2024-11-09 05:58:10,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:09" (2/3) ... [2024-11-09 05:58:10,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3100e8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:58:10, skipping insertion in model container [2024-11-09 05:58:10,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:58:10" (3/3) ... [2024-11-09 05:58:10,413 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2024-11-09 05:58:10,438 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:58:10,439 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:58:10,569 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:58:10,584 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;@296c5d19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:58:10,584 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:58:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 05:58:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:58:10,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:10,624 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:10,625 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:10,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:10,635 INFO L85 PathProgramCache]: Analyzing trace with hash -844036563, now seen corresponding path program 1 times [2024-11-09 05:58:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:10,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746078076] [2024-11-09 05:58:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:10,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:58:11,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:11,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746078076] [2024-11-09 05:58:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746078076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:58:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:58:11,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248763085] [2024-11-09 05:58:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:11,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:11,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:58:11,209 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:58:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:11,372 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2024-11-09 05:58:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2024-11-09 05:58:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:11,387 INFO L225 Difference]: With dead ends: 57 [2024-11-09 05:58:11,387 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 05:58:11,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:11,405 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:11,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 05:58:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2024-11-09 05:58:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 05:58:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-09 05:58:11,477 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2024-11-09 05:58:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:11,478 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-09 05:58:11,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:58:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-09 05:58:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 05:58:11,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:11,481 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:11,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:58:11,482 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:11,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1199674348, now seen corresponding path program 1 times [2024-11-09 05:58:11,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:11,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135780118] [2024-11-09 05:58:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:58:11,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:11,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135780118] [2024-11-09 05:58:11,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135780118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:11,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:58:11,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:58:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380331675] [2024-11-09 05:58:11,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:11,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:11,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:58:11,763 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:58:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:11,899 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-09 05:58:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2024-11-09 05:58:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:11,903 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:58:11,904 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 05:58:11,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:11,909 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:11,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 05:58:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-09 05:58:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 05:58:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-09 05:58:11,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-11-09 05:58:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:11,934 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-09 05:58:11,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:58:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-09 05:58:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:58:11,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:11,936 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:11,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:58:11,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:11,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1771353677, now seen corresponding path program 1 times [2024-11-09 05:58:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902950130] [2024-11-09 05:58:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:12,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156155085] [2024-11-09 05:58:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:12,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:12,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:12,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:58:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:12,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:58:12,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:58:12,329 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:58:12,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902950130] [2024-11-09 05:58:12,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156155085] [2024-11-09 05:58:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156155085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:12,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:58:12,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:58:12,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259734906] [2024-11-09 05:58:12,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:12,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:12,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:12,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:58:12,338 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:58:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:12,488 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-09 05:58:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2024-11-09 05:58:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:12,492 INFO L225 Difference]: With dead ends: 58 [2024-11-09 05:58:12,494 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 05:58:12,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:12,497 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:12,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 05:58:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-09 05:58:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 05:58:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-09 05:58:12,530 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2024-11-09 05:58:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:12,531 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-09 05:58:12,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:58:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-09 05:58:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 05:58:12,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:12,535 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:12,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:58:12,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:12,737 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:12,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1804579360, now seen corresponding path program 1 times [2024-11-09 05:58:12,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:12,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393738379] [2024-11-09 05:58:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052618865] [2024-11-09 05:58:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:12,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:12,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:12,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:58:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:12,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:58:12,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:58:13,060 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:58:13,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393738379] [2024-11-09 05:58:13,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:13,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052618865] [2024-11-09 05:58:13,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052618865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:13,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:58:13,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:58:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384628763] [2024-11-09 05:58:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:13,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:58:13,066 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:58:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:13,205 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-09 05:58:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2024-11-09 05:58:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:13,211 INFO L225 Difference]: With dead ends: 58 [2024-11-09 05:58:13,211 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 05:58:13,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:13,213 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:13,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 05:58:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-09 05:58:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 05:58:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2024-11-09 05:58:13,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 34 [2024-11-09 05:58:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:13,278 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2024-11-09 05:58:13,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:58:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2024-11-09 05:58:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 05:58:13,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:13,280 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:13,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:13,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:13,486 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:13,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389582, now seen corresponding path program 1 times [2024-11-09 05:58:13,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:13,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234532536] [2024-11-09 05:58:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:13,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:13,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523064684] [2024-11-09 05:58:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:13,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:13,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:58:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:13,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:58:13,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 05:58:13,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 05:58:14,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234532536] [2024-11-09 05:58:14,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523064684] [2024-11-09 05:58:14,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523064684] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:14,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:58:14,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 05:58:14,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842848972] [2024-11-09 05:58:14,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:14,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:14,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:14,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:58:14,011 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:58:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:14,118 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-09 05:58:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-11-09 05:58:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:14,122 INFO L225 Difference]: With dead ends: 61 [2024-11-09 05:58:14,122 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 05:58:14,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:58:14,124 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:14,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 05:58:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 05:58:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 05:58:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2024-11-09 05:58:14,143 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 44 [2024-11-09 05:58:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:14,144 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2024-11-09 05:58:14,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:58:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2024-11-09 05:58:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:58:14,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:14,146 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:14,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:14,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:14,348 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:14,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 71620237, now seen corresponding path program 1 times [2024-11-09 05:58:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:14,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981909927] [2024-11-09 05:58:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:14,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 05:58:14,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981909927] [2024-11-09 05:58:14,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981909927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:14,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:58:14,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:58:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172675465] [2024-11-09 05:58:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:14,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:58:14,720 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 05:58:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:14,821 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-11-09 05:58:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2024-11-09 05:58:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:14,825 INFO L225 Difference]: With dead ends: 67 [2024-11-09 05:58:14,826 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 05:58:14,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:14,828 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:14,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 106 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 05:58:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-09 05:58:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 05:58:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-09 05:58:14,859 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 50 [2024-11-09 05:58:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:14,859 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-09 05:58:14,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 05:58:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-09 05:58:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 05:58:14,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:14,862 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:14,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:58:14,866 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:14,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:14,867 INFO L85 PathProgramCache]: Analyzing trace with hash 143268858, now seen corresponding path program 1 times [2024-11-09 05:58:14,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:14,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621056937] [2024-11-09 05:58:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335762778] [2024-11-09 05:58:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:14,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:14,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:14,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:58:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:15,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:58:15,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-09 05:58:15,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-09 05:58:20,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621056937] [2024-11-09 05:58:20,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335762778] [2024-11-09 05:58:20,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335762778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [633681932] [2024-11-09 05:58:20,047 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:58:20,047 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:20,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:20,059 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:20,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:23,553 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:58:23,561 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:58:23,562 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:24,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1901#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:24,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:24,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:58:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-09 05:58:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177044082] [2024-11-09 05:58:24,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:24,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:58:24,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:58:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-09 05:58:24,883 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-09 05:58:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:26,366 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-11-09 05:58:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:58:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-11-09 05:58:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:26,368 INFO L225 Difference]: With dead ends: 110 [2024-11-09 05:58:26,369 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 05:58:26,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:58:26,371 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:26,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 244 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:58:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 05:58:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2024-11-09 05:58:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 54 states have internal predecessors, (56), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 05:58:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-09 05:58:26,418 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 63 [2024-11-09 05:58:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:26,419 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-09 05:58:26,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-09 05:58:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-09 05:58:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 05:58:26,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:26,425 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:26,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:58:26,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:26,626 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:26,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:26,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1858914905, now seen corresponding path program 2 times [2024-11-09 05:58:26,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:26,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438922786] [2024-11-09 05:58:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:26,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156838594] [2024-11-09 05:58:26,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:58:26,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:26,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:26,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:26,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:58:26,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:58:26,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:26,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:58:26,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-09 05:58:27,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-09 05:58:29,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438922786] [2024-11-09 05:58:29,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:29,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156838594] [2024-11-09 05:58:29,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156838594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:29,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575794554] [2024-11-09 05:58:29,005 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:58:29,005 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:29,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:29,006 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:29,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:31,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:58:31,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:58:31,599 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:32,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2662#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:32,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:32,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:58:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-09 05:58:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722261711] [2024-11-09 05:58:32,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:32,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 05:58:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 05:58:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:58:32,731 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-09 05:58:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:33,287 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-11-09 05:58:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:58:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 68 [2024-11-09 05:58:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:33,292 INFO L225 Difference]: With dead ends: 107 [2024-11-09 05:58:33,292 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 05:58:33,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:58:33,297 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:33,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 159 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:58:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 05:58:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-09 05:58:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 59 states have internal predecessors, (61), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 05:58:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2024-11-09 05:58:33,360 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 68 [2024-11-09 05:58:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:33,361 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2024-11-09 05:58:33,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-09 05:58:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2024-11-09 05:58:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:58:33,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:33,364 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:33,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:58:33,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:58:33,565 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:33,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:33,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1998790778, now seen corresponding path program 1 times [2024-11-09 05:58:33,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:33,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261163848] [2024-11-09 05:58:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:33,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:33,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165845914] [2024-11-09 05:58:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:33,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:33,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:33,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:33,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:58:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:33,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:58:33,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-09 05:58:34,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-09 05:58:35,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261163848] [2024-11-09 05:58:35,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165845914] [2024-11-09 05:58:35,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165845914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012011206] [2024-11-09 05:58:35,375 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:58:35,375 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:35,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:35,376 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:35,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:38,017 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:58:38,021 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:58:38,022 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:39,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3463#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:39,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:39,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:58:39,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-09 05:58:39,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517310684] [2024-11-09 05:58:39,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:39,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 05:58:39,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:39,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 05:58:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:58:39,110 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 12 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-09 05:58:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:39,472 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2024-11-09 05:58:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:58:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 12 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 74 [2024-11-09 05:58:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:39,475 INFO L225 Difference]: With dead ends: 105 [2024-11-09 05:58:39,475 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 05:58:39,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:58:39,479 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:39,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 229 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:58:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 05:58:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2024-11-09 05:58:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 05:58:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2024-11-09 05:58:39,523 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 74 [2024-11-09 05:58:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:39,524 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2024-11-09 05:58:39,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 12 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-09 05:58:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2024-11-09 05:58:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 05:58:39,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:39,527 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:39,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:58:39,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:58:39,731 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:39,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 138621095, now seen corresponding path program 1 times [2024-11-09 05:58:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:39,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283530616] [2024-11-09 05:58:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-09 05:58:40,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283530616] [2024-11-09 05:58:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283530616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191200666] [2024-11-09 05:58:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:40,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:40,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:40,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:58:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:40,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:58:40,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 05:58:40,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 05:58:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191200666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:41,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296617071] [2024-11-09 05:58:41,415 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 05:58:41,415 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:41,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:41,416 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:41,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:43,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:58:43,462 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:58:43,464 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:44,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4289#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:44,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:44,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:44,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 19 [2024-11-09 05:58:44,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123201228] [2024-11-09 05:58:44,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:44,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 05:58:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 05:58:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:58:44,399 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-09 05:58:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:44,700 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2024-11-09 05:58:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:58:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) Word has length 79 [2024-11-09 05:58:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:44,703 INFO L225 Difference]: With dead ends: 110 [2024-11-09 05:58:44,703 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 05:58:44,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:58:44,704 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:44,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:58:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 05:58:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-09 05:58:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 21 states have call successors, (21), 14 states have call predecessors, (21), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-09 05:58:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-11-09 05:58:44,730 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 79 [2024-11-09 05:58:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:44,730 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-11-09 05:58:44,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-09 05:58:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-11-09 05:58:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 05:58:44,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:44,732 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:44,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:58:44,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:44,933 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:44,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -391934995, now seen corresponding path program 1 times [2024-11-09 05:58:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:44,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645019147] [2024-11-09 05:58:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:44,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2024-11-09 05:58:45,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:45,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645019147] [2024-11-09 05:58:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645019147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598063183] [2024-11-09 05:58:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:45,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:45,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:45,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:58:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:45,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:58:45,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-09 05:58:45,197 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:58:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598063183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:45,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:58:45,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-09 05:58:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737608346] [2024-11-09 05:58:45,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:45,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:58:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:45,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:58:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:45,200 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-09 05:58:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:45,280 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2024-11-09 05:58:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:58:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2024-11-09 05:58:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:45,284 INFO L225 Difference]: With dead ends: 99 [2024-11-09 05:58:45,284 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 05:58:45,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:58:45,285 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:45,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 05:58:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 05:58:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 05:58:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-11-09 05:58:45,311 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 84 [2024-11-09 05:58:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:45,312 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-11-09 05:58:45,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-09 05:58:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-11-09 05:58:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 05:58:45,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:45,316 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:45,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:45,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:45,516 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:45,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1600846846, now seen corresponding path program 3 times [2024-11-09 05:58:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934033113] [2024-11-09 05:58:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:45,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690977708] [2024-11-09 05:58:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:58:45,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:45,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:58:45,711 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:58:45,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:45,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 05:58:45,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 66 proven. 51 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-11-09 05:58:47,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:47,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934033113] [2024-11-09 05:58:47,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:58:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690977708] [2024-11-09 05:58:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690977708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153795219] [2024-11-09 05:58:47,455 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:58:47,455 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:47,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:47,456 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:47,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:49,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:58:49,563 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:58:49,565 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:50,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5496#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:50,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:50,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:58:50,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-09 05:58:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609575374] [2024-11-09 05:58:50,629 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:50,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:58:50,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:58:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:58:50,631 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-09 05:58:51,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:51,184 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2024-11-09 05:58:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:58:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) Word has length 92 [2024-11-09 05:58:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:51,187 INFO L225 Difference]: With dead ends: 120 [2024-11-09 05:58:51,187 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 05:58:51,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:58:51,193 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:51,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 271 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:58:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 05:58:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2024-11-09 05:58:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-09 05:58:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2024-11-09 05:58:51,259 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 92 [2024-11-09 05:58:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:51,260 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2024-11-09 05:58:51,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-09 05:58:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2024-11-09 05:58:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 05:58:51,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:51,264 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:51,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:51,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:51,465 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:51,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash -894322653, now seen corresponding path program 4 times [2024-11-09 05:58:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:51,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760193545] [2024-11-09 05:58:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:58:51,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829254288] [2024-11-09 05:58:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:58:51,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:51,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:51,553 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:51,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:58:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:51,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 05:58:51,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 27 proven. 67 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2024-11-09 05:58:52,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-11-09 05:59:18,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:59:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760193545] [2024-11-09 05:59:18,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:59:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829254288] [2024-11-09 05:59:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829254288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782117841] [2024-11-09 05:59:18,573 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:59:18,573 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:59:18,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:59:18,574 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:59:18,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:59:21,016 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:59:21,019 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:59:21,020 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:59:22,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6487#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:59:22,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:59:22,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:59:22,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2024-11-09 05:59:22,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509847488] [2024-11-09 05:59:22,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:22,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:59:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:59:22,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:59:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:59:22,066 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 15 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 15 states have call successors, (34) [2024-11-09 05:59:31,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 05:59:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:33,950 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2024-11-09 05:59:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:59:33,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 15 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 15 states have call successors, (34) Word has length 97 [2024-11-09 05:59:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:33,952 INFO L225 Difference]: With dead ends: 139 [2024-11-09 05:59:33,953 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 05:59:33,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 05:59:33,954 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:33,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 398 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 463 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 05:59:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 05:59:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-09 05:59:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 77 states have (on average 1.051948051948052) internal successors, (81), 79 states have internal predecessors, (81), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-09 05:59:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2024-11-09 05:59:34,008 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 97 [2024-11-09 05:59:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:34,009 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2024-11-09 05:59:34,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 15 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 15 states have call successors, (34) [2024-11-09 05:59:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2024-11-09 05:59:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:59:34,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:34,011 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:34,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:34,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:59:34,211 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:34,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1547905546, now seen corresponding path program 2 times [2024-11-09 05:59:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:59:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891115382] [2024-11-09 05:59:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:59:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:59:34,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764710451] [2024-11-09 05:59:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:59:34,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:34,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:34,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:34,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:59:34,336 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:59:34,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:59:34,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:59:34,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 110 proven. 4 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-09 05:59:34,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2024-11-09 05:59:34,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:59:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891115382] [2024-11-09 05:59:34,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:59:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764710451] [2024-11-09 05:59:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764710451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079936435] [2024-11-09 05:59:34,810 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:59:34,810 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:59:34,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:59:34,810 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:59:34,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:59:38,215 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:59:38,219 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:59:38,219 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:59:39,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7577#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:59:39,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:59:39,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:59:39,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-09 05:59:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325080834] [2024-11-09 05:59:39,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:39,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 05:59:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:59:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 05:59:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:59:39,065 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 16 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-09 05:59:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:39,663 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2024-11-09 05:59:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:59:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2024-11-09 05:59:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:39,664 INFO L225 Difference]: With dead ends: 133 [2024-11-09 05:59:39,664 INFO L226 Difference]: Without dead ends: 131 [2024-11-09 05:59:39,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:59:39,666 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:39,666 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:59:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-09 05:59:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-11-09 05:59:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 31 states have call successors, (31), 19 states have call predecessors, (31), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-09 05:59:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2024-11-09 05:59:39,704 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 103 [2024-11-09 05:59:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:39,705 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2024-11-09 05:59:39,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-09 05:59:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2024-11-09 05:59:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 05:59:39,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:39,706 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:39,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:39,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:59:39,907 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:39,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2079618901, now seen corresponding path program 2 times [2024-11-09 05:59:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:59:39,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699343584] [2024-11-09 05:59:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:59:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-09 05:59:40,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:59:40,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699343584] [2024-11-09 05:59:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699343584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:59:40,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420523151] [2024-11-09 05:59:40,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:59:40,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:40,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:40,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:40,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:59:40,562 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:59:40,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:59:40,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:59:40,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2024-11-09 05:59:40,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-09 05:59:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420523151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716883959] [2024-11-09 05:59:40,866 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 05:59:40,867 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:59:40,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:59:40,868 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:59:40,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:59:43,160 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 05:59:43,163 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 05:59:43,164 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:59:44,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8687#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:59:44,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:59:44,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:59:44,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 17 [2024-11-09 05:59:44,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480059647] [2024-11-09 05:59:44,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:44,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:59:44,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:59:44,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:59:44,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:59:44,064 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-09 05:59:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:44,673 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2024-11-09 05:59:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:59:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) Word has length 108 [2024-11-09 05:59:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:44,674 INFO L225 Difference]: With dead ends: 145 [2024-11-09 05:59:44,674 INFO L226 Difference]: Without dead ends: 109 [2024-11-09 05:59:44,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:59:44,676 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:44,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 345 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:59:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-09 05:59:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-09 05:59:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 23 states have call successors, (23), 17 states have call predecessors, (23), 17 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 05:59:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2024-11-09 05:59:44,714 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 108 [2024-11-09 05:59:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:44,714 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2024-11-09 05:59:44,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-09 05:59:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2024-11-09 05:59:44,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 05:59:44,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:44,717 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:44,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:44,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:59:44,921 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:44,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1375093561, now seen corresponding path program 5 times [2024-11-09 05:59:44,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:59:44,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431395060] [2024-11-09 05:59:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:44,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:59:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-09 05:59:45,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:59:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431395060] [2024-11-09 05:59:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431395060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:59:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074020133] [2024-11-09 05:59:45,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:59:45,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:45,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:45,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:45,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:59:45,470 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:59:45,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:59:45,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 05:59:45,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 150 proven. 35 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2024-11-09 05:59:47,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 134 proven. 15 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2024-11-09 06:01:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074020133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:26,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754067665] [2024-11-09 06:01:26,209 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 06:01:26,209 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:26,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:01:26,210 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:01:26,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:01:28,160 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:01:28,164 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:01:28,166 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:01:30,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9799#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:01:30,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:01:30,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 11] total 29 [2024-11-09 06:01:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435449613] [2024-11-09 06:01:30,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:30,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:01:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:01:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:01:30,339 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 29 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 22 states have internal predecessors, (57), 19 states have call successors, (49), 4 states have call predecessors, (49), 3 states have return successors, (49), 19 states have call predecessors, (49), 17 states have call successors, (49) [2024-11-09 06:01:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:33,163 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2024-11-09 06:01:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:01:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 22 states have internal predecessors, (57), 19 states have call successors, (49), 4 states have call predecessors, (49), 3 states have return successors, (49), 19 states have call predecessors, (49), 17 states have call successors, (49) Word has length 109 [2024-11-09 06:01:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:33,164 INFO L225 Difference]: With dead ends: 109 [2024-11-09 06:01:33,164 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 06:01:33,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 291 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 06:01:33,166 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:33,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 200 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:01:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 06:01:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 06:01:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 06:01:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 06:01:33,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-11-09 06:01:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:33,168 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 06:01:33,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 22 states have internal predecessors, (57), 19 states have call successors, (49), 4 states have call predecessors, (49), 3 states have return successors, (49), 19 states have call predecessors, (49), 17 states have call successors, (49) [2024-11-09 06:01:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 06:01:33,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 06:01:33,171 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 06:01:33,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:01:33,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:01:33,374 INFO L407 BasicCegarLoop]: Path program histogram: [5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:33,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 06:01:35,540 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 06:01:35,568 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-09 06:01:35,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 06:01:35 BoogieIcfgContainer [2024-11-09 06:01:35,584 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 06:01:35,585 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 06:01:35,585 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 06:01:35,585 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 06:01:35,585 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:58:10" (3/4) ... [2024-11-09 06:01:35,588 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 06:01:35,592 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-09 06:01:35,592 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-09 06:01:35,601 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-09 06:01:35,602 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-09 06:01:35,602 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 06:01:35,603 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 06:01:35,704 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 06:01:35,705 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 06:01:35,705 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 06:01:35,706 INFO L158 Benchmark]: Toolchain (without parser) took 206454.01ms. Allocated memory was 176.2MB in the beginning and 664.8MB in the end (delta: 488.6MB). Free memory was 135.0MB in the beginning and 242.8MB in the end (delta: -107.8MB). Peak memory consumption was 382.4MB. Max. memory is 16.1GB. [2024-11-09 06:01:35,706 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 127.9MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 06:01:35,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 393.40ms. Allocated memory is still 176.2MB. Free memory was 134.5MB in the beginning and 121.7MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 06:01:35,707 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.42ms. Allocated memory is still 176.2MB. Free memory was 121.7MB in the beginning and 119.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 06:01:35,707 INFO L158 Benchmark]: Boogie Preprocessor took 30.61ms. Allocated memory is still 176.2MB. Free memory was 119.7MB in the beginning and 118.7MB in the end (delta: 998.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 06:01:35,707 INFO L158 Benchmark]: RCFGBuilder took 643.73ms. Allocated memory is still 176.2MB. Free memory was 118.7MB in the beginning and 104.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 06:01:35,708 INFO L158 Benchmark]: TraceAbstraction took 205185.15ms. Allocated memory was 176.2MB in the beginning and 664.8MB in the end (delta: 488.6MB). Free memory was 104.0MB in the beginning and 248.0MB in the end (delta: -144.0MB). Peak memory consumption was 346.7MB. Max. memory is 16.1GB. [2024-11-09 06:01:35,708 INFO L158 Benchmark]: Witness Printer took 120.52ms. Allocated memory is still 664.8MB. Free memory was 248.0MB in the beginning and 242.8MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 06:01:35,710 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 127.9MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 393.40ms. Allocated memory is still 176.2MB. Free memory was 134.5MB in the beginning and 121.7MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.42ms. Allocated memory is still 176.2MB. Free memory was 121.7MB in the beginning and 119.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.61ms. Allocated memory is still 176.2MB. Free memory was 119.7MB in the beginning and 118.7MB in the end (delta: 998.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 643.73ms. Allocated memory is still 176.2MB. Free memory was 118.7MB in the beginning and 104.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 205185.15ms. Allocated memory was 176.2MB in the beginning and 664.8MB in the end (delta: 488.6MB). Free memory was 104.0MB in the beginning and 248.0MB in the end (delta: -144.0MB). Peak memory consumption was 346.7MB. Max. memory is 16.1GB. * Witness Printer took 120.52ms. Allocated memory is still 664.8MB. Free memory was 248.0MB in the beginning and 242.8MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 202.8s, OverallIterations: 16, TraceHistogramMax: 17, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 20.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 257 SdHoareTripleChecker+Valid, 9.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 198 mSDsluCounter, 2893 SdHoareTripleChecker+Invalid, 9.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2451 mSDsCounter, 333 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2783 IncrementalHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 333 mSolverCounterUnsat, 442 mSDtfsCounter, 2783 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2603 GetRequests, 2231 SyntacticMatches, 23 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3416 ImplicationChecksByTransitivity, 30.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=14, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 16 MinimizatonAttempts, 38 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 143.3s InterpolantComputationTime, 2053 NumberOfCodeBlocks, 1897 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2167 ConstructedInterpolants, 1 QuantifiedInterpolants, 24102 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1911 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 29 InterpolantComputations, 7 PerfectInterpolantSequences, 7594/8185 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((((((((p == 4) && (r <= 2)) && (q == 0)) && (r == A)) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d % 2) : ((d % 2) + 2)) == 0)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r)) && ((((d >= 0) ? (d / 2) : ((d / 2) - 1)) + A) == ((__int128) ((long long) 2 * B) + r))) || (((((((A <= 2) && (2 == p)) && (2 == q)) && (((__int128) d + r) == A)) && (A == ((__int128) ((long long) 2 * B) + r))) && (((long long) 2 * B) <= ((__int128) d + r))) && (((long long) A + 1) <= ((long long) 4 * B)))) || ((((((((__int128) r + B) == A) && (p == 1)) && (((long long) A + 1) <= ((__int128) 2 * d))) && (d <= A)) && (q == 1)) && (((__int128) d + r) == A))) || ((((((d == 1) && (p == 1)) && (B == 1)) && (r == 0)) && (2 == q)) && (2 == A))) || ((((((2 == p) && (((long long) 2 * B) == d)) && (q == 0)) && (r == A)) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || ((((p == 1) && (d == B)) && (q == 0)) && (r == A))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((p == 1) && (d == B)) && (r <= 2)) && (q == 0)) && (1 <= d)) && (B <= 2)) && (r == A)) || ((((((p == 4) && (r <= 2)) && (q == 0)) && (r == A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r)) && ((((d >= 0) ? (d / 2) : ((d / 2) - 1)) + A) == ((__int128) ((long long) 2 * B) + r)))) || (((((((1 <= B) && (2 == p)) && (((long long) 2 * B) == d)) && (r <= 2)) && (q == 0)) && (r == A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-11-09 06:01:35,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7a06657-177d-455e-a3c4-4e058746693d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE