./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.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_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/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_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/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_b6c6a0b8-d96a-4415-a352-bd729d09d460/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 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:00:08,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:00:08,521 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:00:08,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:00:08,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:00:08,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:00:08,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:00:08,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:00:08,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:00:08,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:00:08,569 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:00:08,569 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:00:08,570 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:00:08,570 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:00:08,571 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:00:08,573 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:00:08,573 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:00:08,573 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:00:08,574 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:00:08,574 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:00:08,574 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:00:08,579 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:00:08,579 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:00:08,580 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:00:08,580 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:00:08,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:00:08,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:00:08,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:00:08,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:00:08,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:00:08,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:00:08,582 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:00:08,582 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:00:08,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:00:08,583 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:00:08,584 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:00:08,584 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:00:08,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:00:08,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:00:08,585 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:00:08,585 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:00:08,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:00:08,586 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:00:08,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:00:08,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:00:08,587 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:00:08,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:00:08,587 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_b6c6a0b8-d96a-4415-a352-bd729d09d460/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 [2024-11-09 07:00:08,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:00:08,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:00:08,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:00:08,934 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:00:08,935 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:00:08,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c Unable to find full path for "g++" [2024-11-09 07:00:11,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:00:11,305 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:00:11,306 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-11-09 07:00:11,315 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/data/58101aeb7/b3c52b1e23fa4f0287d599e76694e72c/FLAG8fd71f0e4 [2024-11-09 07:00:11,337 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/data/58101aeb7/b3c52b1e23fa4f0287d599e76694e72c [2024-11-09 07:00:11,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:00:11,342 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:00:11,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:00:11,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:00:11,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:00:11,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79df0ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11, skipping insertion in model container [2024-11-09 07:00:11,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,381 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:00:11,605 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_b6c6a0b8-d96a-4415-a352-bd729d09d460/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-11-09 07:00:11,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:00:11,659 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:00:11,675 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_b6c6a0b8-d96a-4415-a352-bd729d09d460/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-11-09 07:00:11,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:00:11,710 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:00:11,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11 WrapperNode [2024-11-09 07:00:11,710 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:00:11,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:00:11,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:00:11,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:00:11,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,752 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-09 07:00:11,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:00:11,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:00:11,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:00:11,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:00:11,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:00:11,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:00:11,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:00:11,794 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:00:11,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (1/1) ... [2024-11-09 07:00:11,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:00:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:11,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:00:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:00:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:00:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 07:00:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 07:00:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:00:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:00:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:00:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 07:00:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 07:00:11,951 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:00:11,953 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:00:12,173 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 07:00:12,173 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:00:12,229 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:00:12,229 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 07:00:12,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:00:12 BoogieIcfgContainer [2024-11-09 07:00:12,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:00:12,233 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:00:12,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:00:12,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:00:12,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:00:11" (1/3) ... [2024-11-09 07:00:12,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b51e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:00:12, skipping insertion in model container [2024-11-09 07:00:12,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:00:11" (2/3) ... [2024-11-09 07:00:12,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b51e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:00:12, skipping insertion in model container [2024-11-09 07:00:12,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:00:12" (3/3) ... [2024-11-09 07:00:12,242 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2024-11-09 07:00:12,263 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:00:12,263 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:00:12,347 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:00:12,355 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;@1d8dc8a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:00:12,356 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:00:12,361 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 07:00:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 07:00:12,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:12,369 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:00:12,370 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:12,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash -844036563, now seen corresponding path program 1 times [2024-11-09 07:00:12,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:12,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354216413] [2024-11-09 07:00:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:12,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:12,872 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 07:00:12,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354216413] [2024-11-09 07:00:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354216413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:00:12,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:00:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:00:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674119191] [2024-11-09 07:00:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:12,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:00:12,949 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 07:00:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:13,142 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2024-11-09 07:00:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:13,145 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 07:00:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:13,155 INFO L225 Difference]: With dead ends: 57 [2024-11-09 07:00:13,156 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 07:00:13,160 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 07:00:13,164 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 07:00:13,168 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 07:00:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 07:00:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2024-11-09 07:00:13,232 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 07:00:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-09 07:00:13,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2024-11-09 07:00:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:13,242 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-09 07:00:13,243 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 07:00:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-09 07:00:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:00:13,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:13,247 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 07:00:13,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:00:13,248 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:13,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1199674348, now seen corresponding path program 1 times [2024-11-09 07:00:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:13,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728386294] [2024-11-09 07:00:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:13,521 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 07:00:13,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728386294] [2024-11-09 07:00:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728386294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:00:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:00:13,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:00:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261741999] [2024-11-09 07:00:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:13,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:13,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:00:13,527 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 07:00:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:13,616 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-09 07:00:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:13,618 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 07:00:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:13,619 INFO L225 Difference]: With dead ends: 41 [2024-11-09 07:00:13,620 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 07:00:13,620 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 07:00:13,622 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 07:00:13,623 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 07:00:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 07:00:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-09 07:00:13,646 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 07:00:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-09 07:00:13,651 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-11-09 07:00:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:13,652 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-09 07:00:13,652 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 07:00:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-09 07:00:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 07:00:13,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:13,657 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 07:00:13,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:00:13,658 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:13,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1771353677, now seen corresponding path program 1 times [2024-11-09 07:00:13,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:13,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963371049] [2024-11-09 07:00:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058130281] [2024-11-09 07:00:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:13,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:13,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:13,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:00:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:13,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:00:13,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:13,986 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 07:00:13,986 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:00:13,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:13,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963371049] [2024-11-09 07:00:13,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:00:13,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058130281] [2024-11-09 07:00:13,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058130281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:00:13,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:00:13,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:00:13,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009459406] [2024-11-09 07:00:13,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:13,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:00:13,992 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 07:00:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:14,109 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-09 07:00:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:14,110 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 07:00:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:14,112 INFO L225 Difference]: With dead ends: 58 [2024-11-09 07:00:14,112 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 07:00:14,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 07:00:14,115 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 07:00:14,115 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 07:00:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 07:00:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-09 07:00:14,138 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 07:00:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-09 07:00:14,143 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2024-11-09 07:00:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:14,146 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-09 07:00:14,146 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 07:00:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-09 07:00:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:00:14,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:14,148 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 07:00:14,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 07:00:14,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:14,355 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:14,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1804579360, now seen corresponding path program 1 times [2024-11-09 07:00:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:14,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568297831] [2024-11-09 07:00:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:14,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416967853] [2024-11-09 07:00:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:14,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:14,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:00:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:14,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:00:14,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:14,629 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 07:00:14,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:00:14,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:14,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568297831] [2024-11-09 07:00:14,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:00:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416967853] [2024-11-09 07:00:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416967853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:00:14,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:00:14,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:00:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637654575] [2024-11-09 07:00:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:14,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:00:14,637 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 07:00:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:14,747 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-09 07:00:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:14,748 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 07:00:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:14,749 INFO L225 Difference]: With dead ends: 58 [2024-11-09 07:00:14,750 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 07:00:14,750 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 07:00:14,751 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 07:00:14,753 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 07:00:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 07:00:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-09 07:00:14,772 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 07:00:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2024-11-09 07:00:14,775 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 34 [2024-11-09 07:00:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:14,776 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2024-11-09 07:00:14,776 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 07:00:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2024-11-09 07:00:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:00:14,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:14,780 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 07:00:14,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:00:14,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:14,981 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:14,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389582, now seen corresponding path program 1 times [2024-11-09 07:00:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:14,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740002358] [2024-11-09 07:00:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121040949] [2024-11-09 07:00:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:15,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:15,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:15,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:15,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:00:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:15,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:00:15,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:15,342 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 07:00:15,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:00:15,545 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 07:00:15,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740002358] [2024-11-09 07:00:15,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:00:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121040949] [2024-11-09 07:00:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121040949] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:00:15,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:00:15,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 07:00:15,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918847967] [2024-11-09 07:00:15,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:15,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:00:15,552 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 07:00:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:15,690 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-09 07:00:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:15,691 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 07:00:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:15,699 INFO L225 Difference]: With dead ends: 61 [2024-11-09 07:00:15,699 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 07:00:15,700 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 07:00:15,703 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 07:00:15,704 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 07:00:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 07:00:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 07:00:15,738 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 07:00:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2024-11-09 07:00:15,740 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 44 [2024-11-09 07:00:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:15,740 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2024-11-09 07:00:15,740 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 07:00:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2024-11-09 07:00:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 07:00:15,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:15,745 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 07:00:15,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:00:15,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:15,946 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:15,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash 71620237, now seen corresponding path program 1 times [2024-11-09 07:00:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:15,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187192374] [2024-11-09 07:00:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:16,220 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 07:00:16,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:16,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187192374] [2024-11-09 07:00:16,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187192374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:00:16,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:00:16,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:00:16,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951518873] [2024-11-09 07:00:16,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:16,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:16,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:16,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:16,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:00:16,225 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 07:00:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:16,318 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-11-09 07:00:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:16,320 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 07:00:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:16,322 INFO L225 Difference]: With dead ends: 67 [2024-11-09 07:00:16,323 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 07:00:16,323 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 07:00:16,326 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 07:00:16,326 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 07:00:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 07:00:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-09 07:00:16,350 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 07:00:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-09 07:00:16,351 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 50 [2024-11-09 07:00:16,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:16,352 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-09 07:00:16,352 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 07:00:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-09 07:00:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 07:00:16,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:16,356 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 07:00:16,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 07:00:16,357 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:16,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash 143268858, now seen corresponding path program 1 times [2024-11-09 07:00:16,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:16,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499464330] [2024-11-09 07:00:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:16,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70053736] [2024-11-09 07:00:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:16,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:16,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:16,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:00:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:16,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 07:00:16,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:17,315 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 07:00:17,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:00:21,292 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 07:00:21,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499464330] [2024-11-09 07:00:21,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:00:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70053736] [2024-11-09 07:00:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70053736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:00:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902027994] [2024-11-09 07:00:21,319 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 07:00:21,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:00:21,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:00:21,331 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:00:21,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:00:24,947 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:00:24,954 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:00:24,956 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:00:26,233 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 07:00:26,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:00:26,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:00:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-09 07:00:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651136403] [2024-11-09 07:00:26,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:00:26,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 07:00:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 07:00:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-09 07:00:26,236 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 07:00:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:27,810 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-11-09 07:00:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:00:27,811 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 07:00:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:27,813 INFO L225 Difference]: With dead ends: 110 [2024-11-09 07:00:27,813 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 07:00:27,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:00:27,817 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:00:27,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 244 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:00:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 07:00:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2024-11-09 07:00:27,854 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 07:00:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-09 07:00:27,857 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 63 [2024-11-09 07:00:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:27,858 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-09 07:00:27,858 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 07:00:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-09 07:00:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 07:00:27,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:27,860 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 07:00:27,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:00:28,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:28,061 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:28,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1858914905, now seen corresponding path program 2 times [2024-11-09 07:00:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154688187] [2024-11-09 07:00:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:28,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:28,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300101246] [2024-11-09 07:00:28,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:00:28,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:28,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:28,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:00:28,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:00:28,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:00:28,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 07:00:28,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:28,464 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 07:00:28,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:00:30,115 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 07:00:30,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154688187] [2024-11-09 07:00:30,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:00:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300101246] [2024-11-09 07:00:30,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300101246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:00:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779691950] [2024-11-09 07:00:30,119 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 07:00:30,119 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:00:30,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:00:30,120 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:00:30,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:00:32,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:00:32,387 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:00:32,389 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:00:33,535 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 07:00:33,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:00:33,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:00:33,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-09 07:00:33,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143789224] [2024-11-09 07:00:33,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:00:33,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 07:00:33,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 07:00:33,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-09 07:00:33,540 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 07:00:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:34,022 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-11-09 07:00:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:00:34,023 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 07:00:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:34,024 INFO L225 Difference]: With dead ends: 107 [2024-11-09 07:00:34,024 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 07:00:34,025 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 07:00:34,026 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 07:00:34,026 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 07:00:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 07:00:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-09 07:00:34,069 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 07:00:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2024-11-09 07:00:34,071 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 68 [2024-11-09 07:00:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:34,071 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2024-11-09 07:00:34,071 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 07:00:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2024-11-09 07:00:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 07:00:34,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:34,073 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 07:00:34,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:00:34,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:34,278 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:34,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1998790778, now seen corresponding path program 1 times [2024-11-09 07:00:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:34,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422513679] [2024-11-09 07:00:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:34,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58043824] [2024-11-09 07:00:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:34,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:34,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:34,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:34,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:00:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:34,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 07:00:34,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:34,884 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 07:00:34,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:00:35,977 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 07:00:35,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422513679] [2024-11-09 07:00:35,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:00:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58043824] [2024-11-09 07:00:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58043824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:00:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759040090] [2024-11-09 07:00:35,981 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:00:35,981 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:00:35,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:00:35,982 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:00:35,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:00:38,032 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:00:38,038 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:00:38,040 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:00:38,963 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 07:00:38,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:00:38,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:00:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-09 07:00:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554904307] [2024-11-09 07:00:38,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:00:38,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:00:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:00:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-09 07:00:38,966 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 07:00:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:39,326 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2024-11-09 07:00:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:00:39,327 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 07:00:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:39,329 INFO L225 Difference]: With dead ends: 105 [2024-11-09 07:00:39,329 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 07:00:39,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:00:39,330 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 07:00:39,331 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 07:00:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 07:00:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2024-11-09 07:00:39,359 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 07:00:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2024-11-09 07:00:39,361 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 74 [2024-11-09 07:00:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:39,361 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2024-11-09 07:00:39,361 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 07:00:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2024-11-09 07:00:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 07:00:39,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:39,363 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 07:00:39,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:00:39,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:39,568 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:39,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash 138621095, now seen corresponding path program 1 times [2024-11-09 07:00:39,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:39,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110101566] [2024-11-09 07:00:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:39,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:39,942 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 07:00:39,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:39,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110101566] [2024-11-09 07:00:39,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110101566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:00:39,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653858390] [2024-11-09 07:00:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:39,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:39,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:00:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:40,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:00:40,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:40,369 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 07:00:40,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:00:40,957 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 07:00:40,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653858390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:00:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629279236] [2024-11-09 07:00:40,960 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 07:00:40,960 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:00:40,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:00:40,961 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:00:40,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:00:43,047 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:00:43,053 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:00:43,054 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:00:43,953 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 07:00:43,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:00:43,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:00:43,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 19 [2024-11-09 07:00:43,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553448130] [2024-11-09 07:00:43,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:00:43,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:00:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:00:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:00:43,957 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 07:00:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:44,339 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2024-11-09 07:00:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:00:44,341 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 07:00:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:44,346 INFO L225 Difference]: With dead ends: 110 [2024-11-09 07:00:44,346 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 07:00:44,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:00:44,348 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:00:44,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:00:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 07:00:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-09 07:00:44,389 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 07:00:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-11-09 07:00:44,391 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 79 [2024-11-09 07:00:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:44,391 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-11-09 07:00:44,391 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 07:00:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-11-09 07:00:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 07:00:44,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:44,393 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 07:00:44,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:00:44,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:44,594 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:44,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash -391934995, now seen corresponding path program 1 times [2024-11-09 07:00:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:44,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789102481] [2024-11-09 07:00:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:44,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:44,721 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 07:00:44,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:00:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789102481] [2024-11-09 07:00:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789102481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:00:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507552837] [2024-11-09 07:00:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:44,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:44,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:44,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:00:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:00:44,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:00:44,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:44,842 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 07:00:44,842 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:00:44,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507552837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:00:44,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:00:44,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-09 07:00:44,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433049357] [2024-11-09 07:00:44,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:00:44,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:00:44,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:00:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:00:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:00:44,847 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 07:00:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:00:44,935 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2024-11-09 07:00:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:00:44,937 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 07:00:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:00:44,939 INFO L225 Difference]: With dead ends: 99 [2024-11-09 07:00:44,940 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 07:00:44,940 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 07:00:44,941 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 07:00:44,942 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 07:00:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 07:00:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 07:00:44,976 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 07:00:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-11-09 07:00:44,979 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 84 [2024-11-09 07:00:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:00:44,980 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-11-09 07:00:44,981 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 07:00:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-11-09 07:00:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 07:00:44,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:00:44,982 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 07:00:45,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:00:45,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:45,183 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:00:45,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:00:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1600846846, now seen corresponding path program 3 times [2024-11-09 07:00:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:00:45,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922197133] [2024-11-09 07:00:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:00:45,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:00:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:00:45,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313243129] [2024-11-09 07:00:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:00:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:00:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:00:45,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:00:45,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:00:45,350 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:00:45,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:00:45,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 07:00:45,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:00:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-09 07:00:46,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:01:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-09 07:01:13,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:01:13,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922197133] [2024-11-09 07:01:13,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:01:13,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313243129] [2024-11-09 07:01:13,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313243129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:01:13,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369488007] [2024-11-09 07:01:13,913 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 07:01:13,913 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:01:13,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:01:13,914 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:01:13,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:01:15,768 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:01:15,773 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:01:15,775 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:01:17,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5752#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:01:17,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:01:17,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:01:17,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2024-11-09 07:01:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646016699] [2024-11-09 07:01:17,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:01:17,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:01:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:01:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:01:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:01:17,624 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 15 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-09 07:01:30,012 WARN L286 SmtUtils]: Spent 11.67s on a formula simplification. DAG size of input: 196 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:01:40,701 WARN L286 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 107 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:01:44,487 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 07:01:59,045 WARN L286 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 177 DAG size of output: 133 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:02:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:00,433 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2024-11-09 07:02:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 07:02:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 15 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 13 states have call successors, (29) Word has length 92 [2024-11-09 07:02:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:00,435 INFO L225 Difference]: With dead ends: 149 [2024-11-09 07:02:00,435 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 07:02:00,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 238 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 07:02:00,437 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:00,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 354 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 375 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2024-11-09 07:02:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 07:02:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 93. [2024-11-09 07:02:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 59 states have internal predecessors, (60), 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 07:02:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-09 07:02:00,478 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 92 [2024-11-09 07:02:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:00,479 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-09 07:02:00,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 15 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-09 07:02:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-09 07:02:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 07:02:00,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:00,480 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 07:02:00,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:02:00,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:00,681 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:00,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash -894322653, now seen corresponding path program 4 times [2024-11-09 07:02:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925037429] [2024-11-09 07:02:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:02:00,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930579019] [2024-11-09 07:02:00,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:02:00,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:00,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:00,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:00,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:02:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:00,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 07:02:00,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:01,515 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 07:02:01,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:02:17,274 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 07:02:17,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925037429] [2024-11-09 07:02:17,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:02:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930579019] [2024-11-09 07:02:17,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930579019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:02:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460175222] [2024-11-09 07:02:17,278 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 07:02:17,278 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:02:17,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:02:17,279 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:02:17,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:02:20,082 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:02:20,085 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:02:20,086 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:02:21,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6770#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:02:21,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:02:21,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:02:21,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-09 07:02:21,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870869204] [2024-11-09 07:02:21,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:02:21,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:02:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:02:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 07:02:21,160 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 14 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2024-11-09 07:02:26,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:02:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:28,084 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2024-11-09 07:02:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:02:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 14 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) Word has length 97 [2024-11-09 07:02:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:28,086 INFO L225 Difference]: With dead ends: 131 [2024-11-09 07:02:28,086 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 07:02:28,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 07:02:28,088 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:28,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 335 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 07:02:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 07:02:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-09 07:02:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.056338028169014) internal successors, (75), 73 states have internal predecessors, (75), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-09 07:02:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2024-11-09 07:02:28,148 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 97 [2024-11-09 07:02:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:28,148 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2024-11-09 07:02:28,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 14 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2024-11-09 07:02:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2024-11-09 07:02:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 07:02:28,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:28,149 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 07:02:28,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:02:28,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:28,350 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:28,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1547905546, now seen corresponding path program 2 times [2024-11-09 07:02:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762845977] [2024-11-09 07:02:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:28,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:02:28,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437788528] [2024-11-09 07:02:28,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:02:28,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:28,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:28,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:28,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:02:28,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:02:28,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:02:28,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 07:02:28,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 114 proven. 14 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2024-11-09 07:02:28,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:02:29,141 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 07:02:29,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762845977] [2024-11-09 07:02:29,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:02:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437788528] [2024-11-09 07:02:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437788528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:02:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530943390] [2024-11-09 07:02:29,143 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:02:29,144 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:02:29,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:02:29,144 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:02:29,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:02:31,313 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:02:31,316 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:02:31,317 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:02:32,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7826#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:02:32,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:02:32,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:02:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2024-11-09 07:02:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432138448] [2024-11-09 07:02:32,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:02:32,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:02:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:02:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2024-11-09 07:02:32,143 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand has 18 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-09 07:02:33,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:02:35,753 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 [0] [2024-11-09 07:02:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:36,592 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2024-11-09 07:02:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:02:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 103 [2024-11-09 07:02:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:36,594 INFO L225 Difference]: With dead ends: 125 [2024-11-09 07:02:36,594 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 07:02:36,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 275 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:02:36,596 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:36,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 135 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2024-11-09 07:02:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 07:02:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-09 07:02:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 31 states have call successors, (31), 17 states have call predecessors, (31), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-09 07:02:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2024-11-09 07:02:36,656 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 103 [2024-11-09 07:02:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:36,657 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2024-11-09 07:02:36,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-09 07:02:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2024-11-09 07:02:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 07:02:36,658 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:36,659 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 07:02:36,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:02:36,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 07:02:36,863 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:36,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2079618901, now seen corresponding path program 2 times [2024-11-09 07:02:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:36,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281760583] [2024-11-09 07:02:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:36,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:37,489 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 07:02:37,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:37,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281760583] [2024-11-09 07:02:37,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281760583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:37,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84051626] [2024-11-09 07:02:37,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:02:37,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:37,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:37,492 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:37,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:02:37,554 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:02:37,554 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:02:37,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:02:37,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:37,748 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 07:02:37,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:02:37,925 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 07:02:37,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84051626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:02:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6870441] [2024-11-09 07:02:37,927 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 07:02:37,927 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:02:37,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:02:37,928 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:02:37,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:02:40,544 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:02:40,549 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:02:40,550 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:02:41,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8914#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:02:41,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:02:41,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:02:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 17 [2024-11-09 07:02:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134900943] [2024-11-09 07:02:41,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:02:41,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 07:02:41,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 07:02:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-09 07:02:41,467 INFO L87 Difference]: Start difference. First operand 123 states and 139 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 07:02:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:42,126 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2024-11-09 07:02:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:02:42,126 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 07:02:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:42,128 INFO L225 Difference]: With dead ends: 137 [2024-11-09 07:02:42,128 INFO L226 Difference]: Without dead ends: 105 [2024-11-09 07:02:42,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:02:42,129 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:42,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 341 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:02:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-09 07:02:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-09 07:02:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 23 states have call successors, (23), 16 states have call predecessors, (23), 16 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 07:02:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2024-11-09 07:02:42,204 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 108 [2024-11-09 07:02:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:42,205 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2024-11-09 07:02:42,205 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 07:02:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2024-11-09 07:02:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-09 07:02:42,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:42,207 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:42,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 07:02:42,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 07:02:42,408 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:42,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash 116944216, now seen corresponding path program 5 times [2024-11-09 07:02:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858110882] [2024-11-09 07:02:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:02:42,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289116879] [2024-11-09 07:02:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:02:42,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:42,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:42,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:42,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c6a0b8-d96a-4415-a352-bd729d09d460/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:02:42,645 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 07:02:42,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:02:42,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 07:02:42,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-09 07:02:44,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:04:14,991 WARN L286 SmtUtils]: Spent 28.55s on a formula simplification that was a NOOP. DAG size: 516 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:09:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 83 proven. 52 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-11-09 07:09:48,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:48,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858110882] [2024-11-09 07:09:48,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:09:48,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289116879] [2024-11-09 07:09:48,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289116879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:48,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152988584] [2024-11-09 07:09:48,278 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 07:09:48,278 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:48,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:48,279 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:48,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:49,904 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 07:09:49,910 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 07:09:49,911 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:54,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10077#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:09:54,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:54,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:09:54,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2024-11-09 07:09:54,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734323962] [2024-11-09 07:09:54,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:54,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:09:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:09:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:09:54,123 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 17 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 15 states have call predecessors, (42), 15 states have call successors, (42) [2024-11-09 07:12:30,446 WARN L286 SmtUtils]: Spent 2.51m on a formula simplification. DAG size of input: 781 DAG size of output: 305 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:12:32,571 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 07:14:49,587 WARN L286 SmtUtils]: Spent 2.22m on a formula simplification. DAG size of input: 701 DAG size of output: 271 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 07:14:51,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:14:52,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:14:54,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []