./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh --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 695c99bbb2ee4f955d16991d39d1ac6b5b32c36e8696260349d8fb0dae4c113f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:43:29,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:43:29,441 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:43:29,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:43:29,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:43:29,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:43:29,469 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:43:29,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:43:29,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:43:29,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:43:29,471 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:43:29,472 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:43:29,472 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:43:29,473 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:43:29,473 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:43:29,474 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:43:29,474 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:43:29,475 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:43:29,475 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:43:29,475 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:43:29,476 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:43:29,477 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:43:29,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:43:29,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:43:29,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:43:29,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:43:29,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:43:29,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:43:29,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:43:29,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:43:29,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:43:29,480 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:43:29,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:43:29,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:43:29,481 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:43:29,481 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:43:29,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:43:29,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:43:29,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:43:29,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:43:29,482 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:43:29,483 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:43:29,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:43:29,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:43:29,483 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:43:29,483 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:43:29,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:43:29,484 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_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 695c99bbb2ee4f955d16991d39d1ac6b5b32c36e8696260349d8fb0dae4c113f [2023-12-02 12:43:29,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:43:29,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:43:29,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:43:29,747 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:43:29,748 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:43:29,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-12-02 12:43:32,605 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:43:32,829 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:43:32,830 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-12-02 12:43:32,846 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/data/4c4d2e985/bdfa060e8d0043279ae6b3dd351608af/FLAG323019911 [2023-12-02 12:43:32,860 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/data/4c4d2e985/bdfa060e8d0043279ae6b3dd351608af [2023-12-02 12:43:32,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:43:32,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:43:32,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:43:32,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:43:32,871 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:43:32,872 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:43:32" (1/1) ... [2023-12-02 12:43:32,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfb65e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:32, skipping insertion in model container [2023-12-02 12:43:32,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:43:32" (1/1) ... [2023-12-02 12:43:32,942 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:43:33,223 WARN L240 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_991b95fe-0ff7-49fa-8648-5f04ba613ee5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2023-12-02 12:43:33,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:43:33,324 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:43:33,395 WARN L240 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_991b95fe-0ff7-49fa-8648-5f04ba613ee5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2023-12-02 12:43:33,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:43:33,458 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:43:33,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33 WrapperNode [2023-12-02 12:43:33,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:43:33,460 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:43:33,460 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:43:33,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:43:33,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,541 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1347 [2023-12-02 12:43:33,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:43:33,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:43:33,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:43:33,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:43:33,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,562 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,589 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,602 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,614 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,626 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:43:33,627 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:43:33,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:43:33,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:43:33,628 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (1/1) ... [2023-12-02 12:43:33,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:43:33,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:33,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:43:33,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:43:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:43:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:43:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:43:33,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:43:33,835 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:43:33,837 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:43:34,808 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:43:35,043 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:43:35,044 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 12:43:35,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:43:35 BoogieIcfgContainer [2023-12-02 12:43:35,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:43:35,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:43:35,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:43:35,050 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:43:35,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:43:32" (1/3) ... [2023-12-02 12:43:35,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135a28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:43:35, skipping insertion in model container [2023-12-02 12:43:35,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:33" (2/3) ... [2023-12-02 12:43:35,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135a28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:43:35, skipping insertion in model container [2023-12-02 12:43:35,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:43:35" (3/3) ... [2023-12-02 12:43:35,053 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-12-02 12:43:35,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:43:35,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:43:35,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:43:35,121 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@21108094, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:43:35,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:43:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 263 states, 254 states have (on average 1.68503937007874) internal successors, (428), 262 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:43:35,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:35,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:35,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:35,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1008026508, now seen corresponding path program 1 times [2023-12-02 12:43:35,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:35,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231883887] [2023-12-02 12:43:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:35,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231883887] [2023-12-02 12:43:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231883887] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:35,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345544576] [2023-12-02 12:43:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:35,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:35,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:35,698 INFO L87 Difference]: Start difference. First operand has 263 states, 254 states have (on average 1.68503937007874) internal successors, (428), 262 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:35,868 INFO L93 Difference]: Finished difference Result 444 states and 699 transitions. [2023-12-02 12:43:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2023-12-02 12:43:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:35,883 INFO L225 Difference]: With dead ends: 444 [2023-12-02 12:43:35,884 INFO L226 Difference]: Without dead ends: 327 [2023-12-02 12:43:35,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:35,890 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 149 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:35,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 865 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-02 12:43:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2023-12-02 12:43:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.4969135802469136) internal successors, (485), 324 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 485 transitions. [2023-12-02 12:43:35,949 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 485 transitions. Word has length 102 [2023-12-02 12:43:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:35,950 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 485 transitions. [2023-12-02 12:43:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 485 transitions. [2023-12-02 12:43:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-02 12:43:35,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:35,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:43:35,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:35,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 4688713, now seen corresponding path program 1 times [2023-12-02 12:43:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:35,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490642288] [2023-12-02 12:43:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:35,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:36,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:36,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490642288] [2023-12-02 12:43:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490642288] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:36,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315041644] [2023-12-02 12:43:36,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:36,146 INFO L87 Difference]: Start difference. First operand 325 states and 485 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:36,271 INFO L93 Difference]: Finished difference Result 577 states and 874 transitions. [2023-12-02 12:43:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-12-02 12:43:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:36,275 INFO L225 Difference]: With dead ends: 577 [2023-12-02 12:43:36,275 INFO L226 Difference]: Without dead ends: 416 [2023-12-02 12:43:36,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:36,279 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 131 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:36,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 645 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-12-02 12:43:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2023-12-02 12:43:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.5012106537530265) internal successors, (620), 413 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 620 transitions. [2023-12-02 12:43:36,301 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 620 transitions. Word has length 104 [2023-12-02 12:43:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:36,301 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 620 transitions. [2023-12-02 12:43:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 620 transitions. [2023-12-02 12:43:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 12:43:36,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:36,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:36,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:43:36,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:36,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1819562101, now seen corresponding path program 1 times [2023-12-02 12:43:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148274612] [2023-12-02 12:43:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:36,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148274612] [2023-12-02 12:43:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148274612] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:36,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:36,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444927123] [2023-12-02 12:43:36,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:36,458 INFO L87 Difference]: Start difference. First operand 414 states and 620 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:36,570 INFO L93 Difference]: Finished difference Result 859 states and 1303 transitions. [2023-12-02 12:43:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-12-02 12:43:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:36,575 INFO L225 Difference]: With dead ends: 859 [2023-12-02 12:43:36,575 INFO L226 Difference]: Without dead ends: 611 [2023-12-02 12:43:36,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:36,579 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 130 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:36,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 733 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2023-12-02 12:43:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2023-12-02 12:43:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.5082236842105263) internal successors, (917), 608 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 917 transitions. [2023-12-02 12:43:36,603 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 917 transitions. Word has length 107 [2023-12-02 12:43:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:36,603 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 917 transitions. [2023-12-02 12:43:36,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 917 transitions. [2023-12-02 12:43:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 12:43:36,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:36,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:36,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:43:36,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:36,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1835562754, now seen corresponding path program 1 times [2023-12-02 12:43:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:36,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91902091] [2023-12-02 12:43:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:36,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:36,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91902091] [2023-12-02 12:43:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91902091] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:36,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:36,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:36,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385366944] [2023-12-02 12:43:36,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:36,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:36,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:36,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:36,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:36,743 INFO L87 Difference]: Start difference. First operand 609 states and 917 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:36,845 INFO L93 Difference]: Finished difference Result 1318 states and 2005 transitions. [2023-12-02 12:43:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:36,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-12-02 12:43:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:36,854 INFO L225 Difference]: With dead ends: 1318 [2023-12-02 12:43:36,854 INFO L226 Difference]: Without dead ends: 875 [2023-12-02 12:43:36,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:36,864 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 129 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:36,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 662 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2023-12-02 12:43:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2023-12-02 12:43:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5160550458715596) internal successors, (1322), 872 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1322 transitions. [2023-12-02 12:43:36,885 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1322 transitions. Word has length 109 [2023-12-02 12:43:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:36,885 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1322 transitions. [2023-12-02 12:43:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1322 transitions. [2023-12-02 12:43:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 12:43:36,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:36,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:36,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:43:36,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:36,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:36,887 INFO L85 PathProgramCache]: Analyzing trace with hash 358778488, now seen corresponding path program 1 times [2023-12-02 12:43:36,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:36,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830392375] [2023-12-02 12:43:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:37,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:37,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830392375] [2023-12-02 12:43:37,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830392375] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:37,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:37,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:37,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262217133] [2023-12-02 12:43:37,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:37,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:37,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:37,016 INFO L87 Difference]: Start difference. First operand 873 states and 1322 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:37,141 INFO L93 Difference]: Finished difference Result 2098 states and 3193 transitions. [2023-12-02 12:43:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-12-02 12:43:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:37,149 INFO L225 Difference]: With dead ends: 2098 [2023-12-02 12:43:37,149 INFO L226 Difference]: Without dead ends: 1409 [2023-12-02 12:43:37,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:37,152 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 124 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:37,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 706 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2023-12-02 12:43:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1407. [2023-12-02 12:43:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 1.5120910384068278) internal successors, (2126), 1406 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2126 transitions. [2023-12-02 12:43:37,184 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2126 transitions. Word has length 112 [2023-12-02 12:43:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:37,184 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 2126 transitions. [2023-12-02 12:43:37,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2126 transitions. [2023-12-02 12:43:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 12:43:37,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:37,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:37,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:43:37,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:37,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash -716766082, now seen corresponding path program 1 times [2023-12-02 12:43:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:37,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180022362] [2023-12-02 12:43:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:37,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:37,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180022362] [2023-12-02 12:43:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180022362] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112040569] [2023-12-02 12:43:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:37,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:37,324 INFO L87 Difference]: Start difference. First operand 1407 states and 2126 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:37,431 INFO L93 Difference]: Finished difference Result 3337 states and 5071 transitions. [2023-12-02 12:43:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:37,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-02 12:43:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:37,443 INFO L225 Difference]: With dead ends: 3337 [2023-12-02 12:43:37,443 INFO L226 Difference]: Without dead ends: 2114 [2023-12-02 12:43:37,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:37,446 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 123 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:37,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 664 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2023-12-02 12:43:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2112. [2023-12-02 12:43:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.515869256276646) internal successors, (3200), 2111 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3200 transitions. [2023-12-02 12:43:37,491 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3200 transitions. Word has length 114 [2023-12-02 12:43:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:37,491 INFO L495 AbstractCegarLoop]: Abstraction has 2112 states and 3200 transitions. [2023-12-02 12:43:37,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3200 transitions. [2023-12-02 12:43:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 12:43:37,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:37,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:37,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:43:37,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:37,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash -405438626, now seen corresponding path program 1 times [2023-12-02 12:43:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:37,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836512902] [2023-12-02 12:43:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:37,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:37,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836512902] [2023-12-02 12:43:37,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836512902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:37,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:37,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931216692] [2023-12-02 12:43:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:37,627 INFO L87 Difference]: Start difference. First operand 2112 states and 3200 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:37,758 INFO L93 Difference]: Finished difference Result 5473 states and 8287 transitions. [2023-12-02 12:43:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-12-02 12:43:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:37,777 INFO L225 Difference]: With dead ends: 5473 [2023-12-02 12:43:37,778 INFO L226 Difference]: Without dead ends: 3563 [2023-12-02 12:43:37,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:37,781 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 118 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:37,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 679 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2023-12-02 12:43:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3561. [2023-12-02 12:43:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 1.5030898876404495) internal successors, (5351), 3560 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 5351 transitions. [2023-12-02 12:43:37,874 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 5351 transitions. Word has length 117 [2023-12-02 12:43:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:37,874 INFO L495 AbstractCegarLoop]: Abstraction has 3561 states and 5351 transitions. [2023-12-02 12:43:37,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 5351 transitions. [2023-12-02 12:43:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 12:43:37,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:37,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:37,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:43:37,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:37,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -582704553, now seen corresponding path program 1 times [2023-12-02 12:43:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309964380] [2023-12-02 12:43:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:37,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:38,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309964380] [2023-12-02 12:43:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309964380] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280761718] [2023-12-02 12:43:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:38,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:38,005 INFO L87 Difference]: Start difference. First operand 3561 states and 5351 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:38,147 INFO L93 Difference]: Finished difference Result 8848 states and 13345 transitions. [2023-12-02 12:43:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-12-02 12:43:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:38,181 INFO L225 Difference]: With dead ends: 8848 [2023-12-02 12:43:38,181 INFO L226 Difference]: Without dead ends: 5489 [2023-12-02 12:43:38,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:38,187 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 117 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:38,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 666 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5489 states. [2023-12-02 12:43:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5489 to 5487. [2023-12-02 12:43:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 1.5052861830113016) internal successors, (8258), 5486 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 8258 transitions. [2023-12-02 12:43:38,408 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 8258 transitions. Word has length 119 [2023-12-02 12:43:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:38,409 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 8258 transitions. [2023-12-02 12:43:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 8258 transitions. [2023-12-02 12:43:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 12:43:38,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:38,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:38,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:43:38,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:38,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:38,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1787106275, now seen corresponding path program 1 times [2023-12-02 12:43:38,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:38,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116477307] [2023-12-02 12:43:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:38,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:38,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:38,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116477307] [2023-12-02 12:43:38,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116477307] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:38,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:38,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:43:38,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130118424] [2023-12-02 12:43:38,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:38,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:43:38,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:38,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:43:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:38,641 INFO L87 Difference]: Start difference. First operand 5487 states and 8258 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:39,096 INFO L93 Difference]: Finished difference Result 13731 states and 20718 transitions. [2023-12-02 12:43:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:43:39,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2023-12-02 12:43:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:39,140 INFO L225 Difference]: With dead ends: 13731 [2023-12-02 12:43:39,140 INFO L226 Difference]: Without dead ends: 8410 [2023-12-02 12:43:39,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:43:39,148 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1011 mSDsluCounter, 2753 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:39,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 3111 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:43:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8410 states. [2023-12-02 12:43:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8410 to 8353. [2023-12-02 12:43:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8353 states, 8352 states have (on average 1.5092193486590038) internal successors, (12605), 8352 states have internal predecessors, (12605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8353 states to 8353 states and 12605 transitions. [2023-12-02 12:43:39,378 INFO L78 Accepts]: Start accepts. Automaton has 8353 states and 12605 transitions. Word has length 122 [2023-12-02 12:43:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:39,378 INFO L495 AbstractCegarLoop]: Abstraction has 8353 states and 12605 transitions. [2023-12-02 12:43:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 8353 states and 12605 transitions. [2023-12-02 12:43:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 12:43:39,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:39,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:39,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:43:39,381 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:39,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash 367218292, now seen corresponding path program 1 times [2023-12-02 12:43:39,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:39,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334732981] [2023-12-02 12:43:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:39,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:39,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:39,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334732981] [2023-12-02 12:43:39,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334732981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:39,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:39,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:43:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277081817] [2023-12-02 12:43:39,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:43:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:43:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:43:39,528 INFO L87 Difference]: Start difference. First operand 8353 states and 12605 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:39,707 INFO L93 Difference]: Finished difference Result 16488 states and 24892 transitions. [2023-12-02 12:43:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:43:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-12-02 12:43:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:39,742 INFO L225 Difference]: With dead ends: 16488 [2023-12-02 12:43:39,743 INFO L226 Difference]: Without dead ends: 8355 [2023-12-02 12:43:39,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:43:39,755 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 246 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:39,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1001 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8355 states. [2023-12-02 12:43:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8355 to 8346. [2023-12-02 12:43:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8346 states, 8345 states have (on average 1.5055721989215098) internal successors, (12564), 8345 states have internal predecessors, (12564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8346 states to 8346 states and 12564 transitions. [2023-12-02 12:43:39,948 INFO L78 Accepts]: Start accepts. Automaton has 8346 states and 12564 transitions. Word has length 123 [2023-12-02 12:43:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:39,949 INFO L495 AbstractCegarLoop]: Abstraction has 8346 states and 12564 transitions. [2023-12-02 12:43:39,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8346 states and 12564 transitions. [2023-12-02 12:43:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 12:43:39,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:39,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:39,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 12:43:39,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:39,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:39,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1311978759, now seen corresponding path program 1 times [2023-12-02 12:43:39,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:39,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411920866] [2023-12-02 12:43:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:39,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:40,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411920866] [2023-12-02 12:43:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411920866] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:40,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:40,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:43:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239046537] [2023-12-02 12:43:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:43:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:43:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:43:40,438 INFO L87 Difference]: Start difference. First operand 8346 states and 12564 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:40,621 INFO L93 Difference]: Finished difference Result 13434 states and 20020 transitions. [2023-12-02 12:43:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:43:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-12-02 12:43:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:40,646 INFO L225 Difference]: With dead ends: 13434 [2023-12-02 12:43:40,647 INFO L226 Difference]: Without dead ends: 13432 [2023-12-02 12:43:40,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:40,651 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 255 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:40,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1627 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13432 states. [2023-12-02 12:43:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13432 to 8470. [2023-12-02 12:43:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8470 states, 8469 states have (on average 1.4895501239815798) internal successors, (12615), 8469 states have internal predecessors, (12615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8470 states to 8470 states and 12615 transitions. [2023-12-02 12:43:40,845 INFO L78 Accepts]: Start accepts. Automaton has 8470 states and 12615 transitions. Word has length 132 [2023-12-02 12:43:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:40,845 INFO L495 AbstractCegarLoop]: Abstraction has 8470 states and 12615 transitions. [2023-12-02 12:43:40,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8470 states and 12615 transitions. [2023-12-02 12:43:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 12:43:40,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:40,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:43:40,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:40,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1302105839, now seen corresponding path program 1 times [2023-12-02 12:43:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702152233] [2023-12-02 12:43:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:43:47,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702152233] [2023-12-02 12:43:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702152233] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395728038] [2023-12-02 12:43:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:47,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:47,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:47,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:47,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:43:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:48,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:43:48,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:43:48,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395728038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:48,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:48,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 12:43:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154498582] [2023-12-02 12:43:48,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:43:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:43:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:43:48,275 INFO L87 Difference]: Start difference. First operand 8470 states and 12615 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:48,445 INFO L93 Difference]: Finished difference Result 25055 states and 37307 transitions. [2023-12-02 12:43:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:43:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-12-02 12:43:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:48,468 INFO L225 Difference]: With dead ends: 25055 [2023-12-02 12:43:48,468 INFO L226 Difference]: Without dead ends: 16619 [2023-12-02 12:43:48,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:43:48,478 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 861 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:48,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 765 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16619 states. [2023-12-02 12:43:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16619 to 16617. [2023-12-02 12:43:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16617 states, 16616 states have (on average 1.4844126143476168) internal successors, (24665), 16616 states have internal predecessors, (24665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16617 states to 16617 states and 24665 transitions. [2023-12-02 12:43:48,666 INFO L78 Accepts]: Start accepts. Automaton has 16617 states and 24665 transitions. Word has length 141 [2023-12-02 12:43:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:48,667 INFO L495 AbstractCegarLoop]: Abstraction has 16617 states and 24665 transitions. [2023-12-02 12:43:48,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 16617 states and 24665 transitions. [2023-12-02 12:43:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-02 12:43:48,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:48,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:48,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:43:48,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 12:43:48,870 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:48,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 317952340, now seen corresponding path program 1 times [2023-12-02 12:43:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:48,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003330354] [2023-12-02 12:43:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:48,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:43:48,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003330354] [2023-12-02 12:43:48,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003330354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:48,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:48,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:48,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851522858] [2023-12-02 12:43:48,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:48,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:48,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:48,953 INFO L87 Difference]: Start difference. First operand 16617 states and 24665 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:49,212 INFO L93 Difference]: Finished difference Result 49710 states and 73771 transitions. [2023-12-02 12:43:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-12-02 12:43:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:49,251 INFO L225 Difference]: With dead ends: 49710 [2023-12-02 12:43:49,251 INFO L226 Difference]: Without dead ends: 33167 [2023-12-02 12:43:49,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:49,265 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 315 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:49,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 680 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33167 states. [2023-12-02 12:43:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33167 to 16629. [2023-12-02 12:43:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16629 states, 16628 states have (on average 1.4842434447919173) internal successors, (24680), 16628 states have internal predecessors, (24680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16629 states to 16629 states and 24680 transitions. [2023-12-02 12:43:49,522 INFO L78 Accepts]: Start accepts. Automaton has 16629 states and 24680 transitions. Word has length 143 [2023-12-02 12:43:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:49,523 INFO L495 AbstractCegarLoop]: Abstraction has 16629 states and 24680 transitions. [2023-12-02 12:43:49,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16629 states and 24680 transitions. [2023-12-02 12:43:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-02 12:43:49,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:49,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:49,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 12:43:49,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:49,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1456728665, now seen corresponding path program 1 times [2023-12-02 12:43:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170152850] [2023-12-02 12:43:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 12:43:49,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170152850] [2023-12-02 12:43:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170152850] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725820788] [2023-12-02 12:43:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:49,674 INFO L87 Difference]: Start difference. First operand 16629 states and 24680 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:49,865 INFO L93 Difference]: Finished difference Result 48803 states and 72405 transitions. [2023-12-02 12:43:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-12-02 12:43:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:49,899 INFO L225 Difference]: With dead ends: 48803 [2023-12-02 12:43:49,900 INFO L226 Difference]: Without dead ends: 32296 [2023-12-02 12:43:49,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:49,918 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 223 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:49,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 951 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32296 states. [2023-12-02 12:43:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32296 to 32294. [2023-12-02 12:43:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32294 states, 32293 states have (on average 1.4768216022048122) internal successors, (47691), 32293 states have internal predecessors, (47691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32294 states to 32294 states and 47691 transitions. [2023-12-02 12:43:50,354 INFO L78 Accepts]: Start accepts. Automaton has 32294 states and 47691 transitions. Word has length 143 [2023-12-02 12:43:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:50,354 INFO L495 AbstractCegarLoop]: Abstraction has 32294 states and 47691 transitions. [2023-12-02 12:43:50,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 32294 states and 47691 transitions. [2023-12-02 12:43:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-02 12:43:50,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:50,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:50,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:43:50,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:50,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:50,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1334981667, now seen corresponding path program 1 times [2023-12-02 12:43:50,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:50,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219492843] [2023-12-02 12:43:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:55,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219492843] [2023-12-02 12:43:55,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219492843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104274520] [2023-12-02 12:43:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:55,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:55,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:43:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:55,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:43:55,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:43:56,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:43:56,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104274520] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:56,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:43:56,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-02 12:43:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751208029] [2023-12-02 12:43:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:56,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:43:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:43:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:43:56,136 INFO L87 Difference]: Start difference. First operand 32294 states and 47691 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:56,515 INFO L93 Difference]: Finished difference Result 95359 states and 140778 transitions. [2023-12-02 12:43:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:43:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-12-02 12:43:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:56,604 INFO L225 Difference]: With dead ends: 95359 [2023-12-02 12:43:56,604 INFO L226 Difference]: Without dead ends: 63108 [2023-12-02 12:43:56,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:43:56,633 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 836 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:56,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 747 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63108 states. [2023-12-02 12:43:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63108 to 63106. [2023-12-02 12:43:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63106 states, 63105 states have (on average 1.4702479993661357) internal successors, (92780), 63105 states have internal predecessors, (92780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63106 states to 63106 states and 92780 transitions. [2023-12-02 12:43:57,605 INFO L78 Accepts]: Start accepts. Automaton has 63106 states and 92780 transitions. Word has length 144 [2023-12-02 12:43:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:57,605 INFO L495 AbstractCegarLoop]: Abstraction has 63106 states and 92780 transitions. [2023-12-02 12:43:57,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 63106 states and 92780 transitions. [2023-12-02 12:43:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 12:43:57,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:57,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:57,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:43:57,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:57,813 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:43:57,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 818391017, now seen corresponding path program 1 times [2023-12-02 12:43:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:57,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922021213] [2023-12-02 12:43:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:57,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:43:57,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:57,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922021213] [2023-12-02 12:43:57,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922021213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:57,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:57,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:43:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593472233] [2023-12-02 12:43:57,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:57,899 INFO L87 Difference]: Start difference. First operand 63106 states and 92780 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:43:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:58,701 INFO L93 Difference]: Finished difference Result 189212 states and 278176 transitions. [2023-12-02 12:43:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:58,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2023-12-02 12:43:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:58,934 INFO L225 Difference]: With dead ends: 189212 [2023-12-02 12:43:58,934 INFO L226 Difference]: Without dead ends: 126165 [2023-12-02 12:43:58,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:58,972 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 340 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:58,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 997 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:43:59,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126165 states. [2023-12-02 12:43:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126165 to 63112. [2023-12-02 12:44:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63112 states, 63111 states have (on average 1.4702032926114306) internal successors, (92786), 63111 states have internal predecessors, (92786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63112 states to 63112 states and 92786 transitions. [2023-12-02 12:44:00,135 INFO L78 Accepts]: Start accepts. Automaton has 63112 states and 92786 transitions. Word has length 146 [2023-12-02 12:44:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:00,135 INFO L495 AbstractCegarLoop]: Abstraction has 63112 states and 92786 transitions. [2023-12-02 12:44:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 63112 states and 92786 transitions. [2023-12-02 12:44:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 12:44:00,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:00,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:00,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 12:44:00,140 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:00,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash -17293075, now seen corresponding path program 1 times [2023-12-02 12:44:00,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:00,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214939221] [2023-12-02 12:44:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:00,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:44:00,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214939221] [2023-12-02 12:44:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214939221] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:00,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:44:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877429794] [2023-12-02 12:44:00,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:00,281 INFO L87 Difference]: Start difference. First operand 63112 states and 92786 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:00,963 INFO L93 Difference]: Finished difference Result 186379 states and 273911 transitions. [2023-12-02 12:44:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2023-12-02 12:44:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:01,237 INFO L225 Difference]: With dead ends: 186379 [2023-12-02 12:44:01,237 INFO L226 Difference]: Without dead ends: 123681 [2023-12-02 12:44:01,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:01,256 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 241 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 963 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123681 states. [2023-12-02 12:44:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123681 to 123679. [2023-12-02 12:44:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123679 states, 123678 states have (on average 1.4644884296317857) internal successors, (181125), 123678 states have internal predecessors, (181125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123679 states to 123679 states and 181125 transitions. [2023-12-02 12:44:02,652 INFO L78 Accepts]: Start accepts. Automaton has 123679 states and 181125 transitions. Word has length 146 [2023-12-02 12:44:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:02,652 INFO L495 AbstractCegarLoop]: Abstraction has 123679 states and 181125 transitions. [2023-12-02 12:44:02,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 123679 states and 181125 transitions. [2023-12-02 12:44:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-02 12:44:02,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:02,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 12:44:02,658 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:02,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1223468039, now seen corresponding path program 1 times [2023-12-02 12:44:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:02,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524107034] [2023-12-02 12:44:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:02,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:44:05,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:05,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524107034] [2023-12-02 12:44:05,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524107034] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:05,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120668372] [2023-12-02 12:44:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:05,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:05,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:44:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:05,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:44:05,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 12:44:05,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:44:05,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120668372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:05,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:44:05,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 12:44:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206618422] [2023-12-02 12:44:05,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:05,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:44:05,389 INFO L87 Difference]: Start difference. First operand 123679 states and 181125 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:06,020 INFO L93 Difference]: Finished difference Result 248555 states and 363882 transitions. [2023-12-02 12:44:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:06,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-12-02 12:44:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:06,168 INFO L225 Difference]: With dead ends: 248555 [2023-12-02 12:44:06,168 INFO L226 Difference]: Without dead ends: 124894 [2023-12-02 12:44:06,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:44:06,224 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 863 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:06,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 774 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124894 states. [2023-12-02 12:44:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124894 to 123940. [2023-12-02 12:44:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123940 states, 123939 states have (on average 1.464373603143482) internal successors, (181493), 123939 states have internal predecessors, (181493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123940 states to 123940 states and 181493 transitions. [2023-12-02 12:44:08,009 INFO L78 Accepts]: Start accepts. Automaton has 123940 states and 181493 transitions. Word has length 147 [2023-12-02 12:44:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:08,009 INFO L495 AbstractCegarLoop]: Abstraction has 123940 states and 181493 transitions. [2023-12-02 12:44:08,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 123940 states and 181493 transitions. [2023-12-02 12:44:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 12:44:08,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:08,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:08,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:44:08,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:08,216 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:08,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1560386170, now seen corresponding path program 1 times [2023-12-02 12:44:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:08,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353384668] [2023-12-02 12:44:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:44:10,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353384668] [2023-12-02 12:44:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353384668] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863367768] [2023-12-02 12:44:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:10,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:10,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:44:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:10,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:44:10,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:44:10,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:44:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863367768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:44:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 12:44:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178331167] [2023-12-02 12:44:10,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:44:10,962 INFO L87 Difference]: Start difference. First operand 123940 states and 181493 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:11,893 INFO L93 Difference]: Finished difference Result 365356 states and 534793 transitions. [2023-12-02 12:44:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:11,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2023-12-02 12:44:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:12,204 INFO L225 Difference]: With dead ends: 365356 [2023-12-02 12:44:12,204 INFO L226 Difference]: Without dead ends: 241980 [2023-12-02 12:44:12,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:44:12,264 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 844 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:12,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 766 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241980 states. [2023-12-02 12:44:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241980 to 241978. [2023-12-02 12:44:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241978 states, 241977 states have (on average 1.4574897614236064) internal successors, (352679), 241977 states have internal predecessors, (352679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241978 states to 241978 states and 352679 transitions. [2023-12-02 12:44:16,155 INFO L78 Accepts]: Start accepts. Automaton has 241978 states and 352679 transitions. Word has length 149 [2023-12-02 12:44:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:16,156 INFO L495 AbstractCegarLoop]: Abstraction has 241978 states and 352679 transitions. [2023-12-02 12:44:16,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 241978 states and 352679 transitions. [2023-12-02 12:44:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 12:44:16,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:16,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:16,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:44:16,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:16,371 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:16,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2018571722, now seen corresponding path program 1 times [2023-12-02 12:44:16,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:16,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630981824] [2023-12-02 12:44:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:16,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 12:44:16,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630981824] [2023-12-02 12:44:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630981824] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:16,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:16,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:44:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101671065] [2023-12-02 12:44:16,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:16,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:16,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:16,499 INFO L87 Difference]: Start difference. First operand 241978 states and 352679 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:18,611 INFO L93 Difference]: Finished difference Result 709608 states and 1033637 transitions. [2023-12-02 12:44:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:18,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-12-02 12:44:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:19,361 INFO L225 Difference]: With dead ends: 709608 [2023-12-02 12:44:19,361 INFO L226 Difference]: Without dead ends: 469422 [2023-12-02 12:44:19,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:19,876 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 233 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:19,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 965 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469422 states. [2023-12-02 12:44:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469422 to 469420. [2023-12-02 12:44:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469420 states, 469419 states have (on average 1.448793082512638) internal successors, (680091), 469419 states have internal predecessors, (680091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469420 states to 469420 states and 680091 transitions. [2023-12-02 12:44:26,826 INFO L78 Accepts]: Start accepts. Automaton has 469420 states and 680091 transitions. Word has length 151 [2023-12-02 12:44:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:26,827 INFO L495 AbstractCegarLoop]: Abstraction has 469420 states and 680091 transitions. [2023-12-02 12:44:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 469420 states and 680091 transitions. [2023-12-02 12:44:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 12:44:26,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:26,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:26,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 12:44:26,856 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:26,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1213764028, now seen corresponding path program 1 times [2023-12-02 12:44:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:26,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413908383] [2023-12-02 12:44:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:26,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:30,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413908383] [2023-12-02 12:44:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413908383] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038762380] [2023-12-02 12:44:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:30,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:30,064 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:30,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:44:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:30,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:44:30,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 12:44:30,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:44:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038762380] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:30,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:44:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-02 12:44:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342953474] [2023-12-02 12:44:30,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:44:30,496 INFO L87 Difference]: Start difference. First operand 469420 states and 680091 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:33,472 INFO L93 Difference]: Finished difference Result 941860 states and 1364085 transitions. [2023-12-02 12:44:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-12-02 12:44:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:34,395 INFO L225 Difference]: With dead ends: 941860 [2023-12-02 12:44:34,395 INFO L226 Difference]: Without dead ends: 474224 [2023-12-02 12:44:34,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:44:34,628 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 846 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:34,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 770 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474224 states. [2023-12-02 12:44:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474224 to 470022. [2023-12-02 12:44:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470022 states, 470021 states have (on average 1.448690590420428) internal successors, (680915), 470021 states have internal predecessors, (680915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470022 states to 470022 states and 680915 transitions. [2023-12-02 12:44:41,980 INFO L78 Accepts]: Start accepts. Automaton has 470022 states and 680915 transitions. Word has length 151 [2023-12-02 12:44:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:41,980 INFO L495 AbstractCegarLoop]: Abstraction has 470022 states and 680915 transitions. [2023-12-02 12:44:41,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 470022 states and 680915 transitions. [2023-12-02 12:44:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 12:44:42,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:42,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:42,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:44:42,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 12:44:42,221 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:42,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash -628155290, now seen corresponding path program 1 times [2023-12-02 12:44:42,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:42,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446507791] [2023-12-02 12:44:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:44:44,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:44,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446507791] [2023-12-02 12:44:44,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446507791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:44,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293494730] [2023-12-02 12:44:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:44,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:44,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:44:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:44,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:44:44,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:44:45,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:44:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293494730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:45,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:44:45,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 12:44:45,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860082392] [2023-12-02 12:44:45,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:44:45,129 INFO L87 Difference]: Start difference. First operand 470022 states and 680915 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:48,785 INFO L93 Difference]: Finished difference Result 1376586 states and 1994357 transitions. [2023-12-02 12:44:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2023-12-02 12:44:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:50,612 INFO L225 Difference]: With dead ends: 1376586 [2023-12-02 12:44:50,612 INFO L226 Difference]: Without dead ends: 918472 [2023-12-02 12:44:50,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:44:50,816 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 795 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:50,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 732 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918472 states. [2023-12-02 12:45:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918472 to 918470. [2023-12-02 12:45:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918470 states, 918469 states have (on average 1.4422468259679968) internal successors, (1324659), 918469 states have internal predecessors, (1324659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918470 states to 918470 states and 1324659 transitions. [2023-12-02 12:45:04,645 INFO L78 Accepts]: Start accepts. Automaton has 918470 states and 1324659 transitions. Word has length 153 [2023-12-02 12:45:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:04,646 INFO L495 AbstractCegarLoop]: Abstraction has 918470 states and 1324659 transitions. [2023-12-02 12:45:04,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 918470 states and 1324659 transitions. [2023-12-02 12:45:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 12:45:04,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:04,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:04,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:45:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 12:45:04,886 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:45:04,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1571445580, now seen corresponding path program 1 times [2023-12-02 12:45:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:04,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678970633] [2023-12-02 12:45:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:45:14,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:45:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678970633] [2023-12-02 12:45:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678970633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280576712] [2023-12-02 12:45:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:14,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:14,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:45:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:14,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:45:14,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:45:14,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:45:14,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280576712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:45:14,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:45:14,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 12:45:14,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198284954] [2023-12-02 12:45:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:45:14,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:45:14,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:45:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:45:14,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:45:14,578 INFO L87 Difference]: Start difference. First operand 918470 states and 1324659 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:21,596 INFO L93 Difference]: Finished difference Result 2705804 states and 3899665 transitions. [2023-12-02 12:45:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:45:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-12-02 12:45:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:24,547 INFO L225 Difference]: With dead ends: 2705804 [2023-12-02 12:45:24,547 INFO L226 Difference]: Without dead ends: 1787498 [2023-12-02 12:45:24,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:45:24,903 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 844 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:24,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 763 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:45:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787498 states. [2023-12-02 12:45:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787498 to 1787496. [2023-12-02 12:45:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787496 states, 1787495 states have (on average 1.4341673683003309) internal successors, (2563567), 1787495 states have internal predecessors, (2563567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787496 states to 1787496 states and 2563567 transitions. [2023-12-02 12:45:51,554 INFO L78 Accepts]: Start accepts. Automaton has 1787496 states and 2563567 transitions. Word has length 156 [2023-12-02 12:45:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:51,555 INFO L495 AbstractCegarLoop]: Abstraction has 1787496 states and 2563567 transitions. [2023-12-02 12:45:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1787496 states and 2563567 transitions. [2023-12-02 12:45:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-12-02 12:45:51,749 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:51,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:51,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:45:51,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991b95fe-0ff7-49fa-8648-5f04ba613ee5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 12:45:51,950 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:45:51,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 235112554, now seen corresponding path program 1 times [2023-12-02 12:45:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:51,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303667472] [2023-12-02 12:45:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat