./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-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_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/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_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/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_3417c343-77b8-4b9f-b2a8-911106d28e03/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 f4332eab059a2e63fe2129905a86c0f1576ab7a248b3300f50ebbc0c52549386 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:04:23,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:04:23,731 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:04:23,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:04:23,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:04:23,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:04:23,761 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:04:23,762 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:04:23,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:04:23,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:04:23,763 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:04:23,764 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:04:23,764 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:04:23,765 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:04:23,765 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:04:23,766 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:04:23,766 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:04:23,767 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:04:23,767 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:04:23,768 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:04:23,768 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:04:23,769 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:04:23,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:04:23,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:04:23,771 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:04:23,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:04:23,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:04:23,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:04:23,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:04:23,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:04:23,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:04:23,773 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:04:23,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:04:23,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:04:23,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:04:23,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:04:23,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:04:23,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:04:23,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:04:23,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:04:23,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:04:23,777 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:04:23,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:04:23,778 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:04:23,778 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:04:23,778 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:04:23,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:04:23,778 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_3417c343-77b8-4b9f-b2a8-911106d28e03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4332eab059a2e63fe2129905a86c0f1576ab7a248b3300f50ebbc0c52549386 [2023-12-02 15:04:24,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:04:24,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:04:24,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:04:24,027 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:04:24,027 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:04:24,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-12-02 15:04:26,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:04:27,340 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:04:27,341 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-12-02 15:04:27,411 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/data/f502257bf/139a41c8e29b462fb89ed89d77faf9a5/FLAG34e74f639 [2023-12-02 15:04:27,425 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/data/f502257bf/139a41c8e29b462fb89ed89d77faf9a5 [2023-12-02 15:04:27,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:04:27,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:04:27,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:04:27,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:04:27,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:04:27,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:04:27" (1/1) ... [2023-12-02 15:04:27,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e884298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:27, skipping insertion in model container [2023-12-02 15:04:27,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:04:27" (1/1) ... [2023-12-02 15:04:27,766 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:04:28,174 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_3417c343-77b8-4b9f-b2a8-911106d28e03/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[20004,20017] [2023-12-02 15:04:29,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:04:29,485 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:04:29,579 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_3417c343-77b8-4b9f-b2a8-911106d28e03/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[20004,20017] [2023-12-02 15:04:30,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:04:30,902 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:04:30,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30 WrapperNode [2023-12-02 15:04:30,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:04:30,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:04:30,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:04:30,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:04:30,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:30,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,259 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21773 [2023-12-02 15:04:31,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:04:31,260 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:04:31,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:04:31,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:04:31,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,486 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,535 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:04:31,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:04:31,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:04:31,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:04:31,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (1/1) ... [2023-12-02 15:04:31,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:04:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:04:31,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:04:31,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3417c343-77b8-4b9f-b2a8-911106d28e03/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:04:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:04:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:04:31,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:04:31,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:04:32,318 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:04:32,321 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:04:39,452 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:04:39,882 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:04:39,882 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 15:04:39,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:04:39 BoogieIcfgContainer [2023-12-02 15:04:39,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:04:39,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:04:39,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:04:39,889 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:04:39,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:04:27" (1/3) ... [2023-12-02 15:04:39,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26327caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:04:39, skipping insertion in model container [2023-12-02 15:04:39,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:04:30" (2/3) ... [2023-12-02 15:04:39,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26327caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:04:39, skipping insertion in model container [2023-12-02 15:04:39,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:04:39" (3/3) ... [2023-12-02 15:04:39,892 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-12-02 15:04:39,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:04:39,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:04:39,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:04:39,991 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;@de99dbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:04:39,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:04:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 2820 states, 2818 states have (on average 1.910929737402413) internal successors, (5385), 2819 states have internal predecessors, (5385), 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 15:04:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 15:04:40,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:40,035 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] [2023-12-02 15:04:40,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:40,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash -201642858, now seen corresponding path program 1 times [2023-12-02 15:04:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:40,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485577806] [2023-12-02 15:04:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:40,562 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 15:04:40,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:40,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485577806] [2023-12-02 15:04:40,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485577806] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:40,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:40,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:04:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843054105] [2023-12-02 15:04:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:04:40,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:04:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:04:40,604 INFO L87 Difference]: Start difference. First operand has 2820 states, 2818 states have (on average 1.910929737402413) internal successors, (5385), 2819 states have internal predecessors, (5385), 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 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 15:04:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:40,896 INFO L93 Difference]: Finished difference Result 3258 states and 6110 transitions. [2023-12-02 15:04:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:04:40,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2023-12-02 15:04:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:40,928 INFO L225 Difference]: With dead ends: 3258 [2023-12-02 15:04:40,928 INFO L226 Difference]: Without dead ends: 3037 [2023-12-02 15:04:40,933 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 15:04:40,937 INFO L413 NwaCegarLoop]: 5383 mSDtfsCounter, 2638 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2638 SdHoareTripleChecker+Valid, 8378 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:40,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2638 Valid, 8378 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:04:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2023-12-02 15:04:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 3035. [2023-12-02 15:04:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 3034 states have (on average 1.2722478576137113) internal successors, (3860), 3034 states have internal predecessors, (3860), 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 15:04:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 3860 transitions. [2023-12-02 15:04:41,058 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 3860 transitions. Word has length 78 [2023-12-02 15:04:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:41,058 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 3860 transitions. [2023-12-02 15:04:41,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 15:04:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 3860 transitions. [2023-12-02 15:04:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 15:04:41,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:41,066 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] [2023-12-02 15:04:41,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:04:41,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:41,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash -924201457, now seen corresponding path program 1 times [2023-12-02 15:04:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:41,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770254331] [2023-12-02 15:04:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:41,348 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 15:04:41,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770254331] [2023-12-02 15:04:41,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770254331] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:41,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:04:41,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695096359] [2023-12-02 15:04:41,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:04:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:04:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:04:41,352 INFO L87 Difference]: Start difference. First operand 3035 states and 3860 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 15:04:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:42,824 INFO L93 Difference]: Finished difference Result 4646 states and 6013 transitions. [2023-12-02 15:04:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:04:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2023-12-02 15:04:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:42,838 INFO L225 Difference]: With dead ends: 4646 [2023-12-02 15:04:42,838 INFO L226 Difference]: Without dead ends: 2546 [2023-12-02 15:04:42,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:42,844 INFO L413 NwaCegarLoop]: 1545 mSDtfsCounter, 8065 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8065 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:42,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8065 Valid, 1713 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:04:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2023-12-02 15:04:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 2544. [2023-12-02 15:04:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 1.2965001966181675) internal successors, (3297), 2543 states have internal predecessors, (3297), 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 15:04:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 3297 transitions. [2023-12-02 15:04:42,910 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 3297 transitions. Word has length 78 [2023-12-02 15:04:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:42,911 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 3297 transitions. [2023-12-02 15:04:42,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 15:04:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 3297 transitions. [2023-12-02 15:04:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 15:04:42,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:42,918 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] [2023-12-02 15:04:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:04:42,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:42,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1301065873, now seen corresponding path program 1 times [2023-12-02 15:04:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:42,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894897850] [2023-12-02 15:04:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:43,091 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 15:04:43,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894897850] [2023-12-02 15:04:43,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894897850] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:43,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:04:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614551750] [2023-12-02 15:04:43,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:43,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:04:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:04:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:04:43,095 INFO L87 Difference]: Start difference. First operand 2544 states and 3297 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 15:04:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:43,243 INFO L93 Difference]: Finished difference Result 4389 states and 5792 transitions. [2023-12-02 15:04:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:04:43,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2023-12-02 15:04:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:43,263 INFO L225 Difference]: With dead ends: 4389 [2023-12-02 15:04:43,264 INFO L226 Difference]: Without dead ends: 3817 [2023-12-02 15:04:43,266 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 15:04:43,267 INFO L413 NwaCegarLoop]: 3544 mSDtfsCounter, 2275 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 5038 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:43,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2275 Valid, 5038 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:04:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2023-12-02 15:04:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3815. [2023-12-02 15:04:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3814 states have (on average 1.29837441006817) internal successors, (4952), 3814 states have internal predecessors, (4952), 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 15:04:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 4952 transitions. [2023-12-02 15:04:43,366 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 4952 transitions. Word has length 79 [2023-12-02 15:04:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:43,367 INFO L495 AbstractCegarLoop]: Abstraction has 3815 states and 4952 transitions. [2023-12-02 15:04:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 15:04:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 4952 transitions. [2023-12-02 15:04:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 15:04:43,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:43,376 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] [2023-12-02 15:04:43,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:04:43,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:43,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1840010013, now seen corresponding path program 1 times [2023-12-02 15:04:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690673483] [2023-12-02 15:04:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:43,543 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 15:04:43,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:43,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690673483] [2023-12-02 15:04:43,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690673483] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:43,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:43,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:04:43,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019874386] [2023-12-02 15:04:43,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:43,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:04:43,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:04:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:04:43,546 INFO L87 Difference]: Start difference. First operand 3815 states and 4952 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 15:04:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:43,885 INFO L93 Difference]: Finished difference Result 5653 states and 7548 transitions. [2023-12-02 15:04:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:04:43,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2023-12-02 15:04:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:43,910 INFO L225 Difference]: With dead ends: 5653 [2023-12-02 15:04:43,910 INFO L226 Difference]: Without dead ends: 4866 [2023-12-02 15:04:43,913 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 15:04:43,914 INFO L413 NwaCegarLoop]: 2641 mSDtfsCounter, 1186 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 4148 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:43,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 4148 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:04:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2023-12-02 15:04:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4864. [2023-12-02 15:04:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 1.315443142093358) internal successors, (6397), 4863 states have internal predecessors, (6397), 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 15:04:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 6397 transitions. [2023-12-02 15:04:44,045 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 6397 transitions. Word has length 79 [2023-12-02 15:04:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 4864 states and 6397 transitions. [2023-12-02 15:04:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 15:04:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 6397 transitions. [2023-12-02 15:04:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 15:04:44,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:44,056 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] [2023-12-02 15:04:44,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:04:44,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:44,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1469587710, now seen corresponding path program 1 times [2023-12-02 15:04:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:44,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321197852] [2023-12-02 15:04:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:44,283 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 15:04:44,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:44,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321197852] [2023-12-02 15:04:44,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321197852] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:44,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:44,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:04:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429060064] [2023-12-02 15:04:44,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:44,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:04:44,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:04:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:04:44,286 INFO L87 Difference]: Start difference. First operand 4864 states and 6397 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 15:04:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:45,267 INFO L93 Difference]: Finished difference Result 9703 states and 13075 transitions. [2023-12-02 15:04:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:04:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 79 [2023-12-02 15:04:45,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:45,290 INFO L225 Difference]: With dead ends: 9703 [2023-12-02 15:04:45,290 INFO L226 Difference]: Without dead ends: 5713 [2023-12-02 15:04:45,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:45,296 INFO L413 NwaCegarLoop]: 1162 mSDtfsCounter, 5986 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5986 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:45,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5986 Valid, 1333 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:04:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2023-12-02 15:04:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5711. [2023-12-02 15:04:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 1.3504378283712783) internal successors, (7711), 5710 states have internal predecessors, (7711), 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 15:04:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 7711 transitions. [2023-12-02 15:04:45,401 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 7711 transitions. Word has length 79 [2023-12-02 15:04:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:45,402 INFO L495 AbstractCegarLoop]: Abstraction has 5711 states and 7711 transitions. [2023-12-02 15:04:45,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 15:04:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 7711 transitions. [2023-12-02 15:04:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 15:04:45,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:45,408 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] [2023-12-02 15:04:45,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:04:45,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:45,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:45,409 INFO L85 PathProgramCache]: Analyzing trace with hash -961390150, now seen corresponding path program 1 times [2023-12-02 15:04:45,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:45,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728888470] [2023-12-02 15:04:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:45,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:45,571 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 15:04:45,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:45,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728888470] [2023-12-02 15:04:45,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728888470] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:45,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:04:45,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319782977] [2023-12-02 15:04:45,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:45,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:04:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:45,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:04:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:04:45,574 INFO L87 Difference]: Start difference. First operand 5711 states and 7711 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 15:04:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:45,691 INFO L93 Difference]: Finished difference Result 13602 states and 18631 transitions. [2023-12-02 15:04:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:04:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2023-12-02 15:04:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:45,732 INFO L225 Difference]: With dead ends: 13602 [2023-12-02 15:04:45,733 INFO L226 Difference]: Without dead ends: 9637 [2023-12-02 15:04:45,739 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 15:04:45,740 INFO L413 NwaCegarLoop]: 2565 mSDtfsCounter, 1657 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 3703 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:45,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1657 Valid, 3703 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:04:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9637 states. [2023-12-02 15:04:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9637 to 9635. [2023-12-02 15:04:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9635 states, 9634 states have (on average 1.3517749636703342) internal successors, (13023), 9634 states have internal predecessors, (13023), 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 15:04:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9635 states to 9635 states and 13023 transitions. [2023-12-02 15:04:45,930 INFO L78 Accepts]: Start accepts. Automaton has 9635 states and 13023 transitions. Word has length 80 [2023-12-02 15:04:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:45,930 INFO L495 AbstractCegarLoop]: Abstraction has 9635 states and 13023 transitions. [2023-12-02 15:04:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 15:04:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 9635 states and 13023 transitions. [2023-12-02 15:04:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 15:04:45,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:45,944 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] [2023-12-02 15:04:45,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:04:45,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:45,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash 473457151, now seen corresponding path program 1 times [2023-12-02 15:04:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:45,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395408952] [2023-12-02 15:04:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:46,147 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 15:04:46,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395408952] [2023-12-02 15:04:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395408952] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:46,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:46,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:04:46,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268436743] [2023-12-02 15:04:46,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:46,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:04:46,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:04:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:04:46,149 INFO L87 Difference]: Start difference. First operand 9635 states and 13023 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 15:04:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:47,073 INFO L93 Difference]: Finished difference Result 20988 states and 28663 transitions. [2023-12-02 15:04:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:04:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 80 [2023-12-02 15:04:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:47,102 INFO L225 Difference]: With dead ends: 20988 [2023-12-02 15:04:47,102 INFO L226 Difference]: Without dead ends: 13135 [2023-12-02 15:04:47,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:47,114 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 5021 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5021 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:47,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5021 Valid, 1021 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 15:04:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13135 states. [2023-12-02 15:04:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13135 to 13133. [2023-12-02 15:04:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13133 states, 13132 states have (on average 1.3488425220834603) internal successors, (17713), 13132 states have internal predecessors, (17713), 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 15:04:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13133 states to 13133 states and 17713 transitions. [2023-12-02 15:04:47,363 INFO L78 Accepts]: Start accepts. Automaton has 13133 states and 17713 transitions. Word has length 80 [2023-12-02 15:04:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:47,363 INFO L495 AbstractCegarLoop]: Abstraction has 13133 states and 17713 transitions. [2023-12-02 15:04:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 15:04:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 13133 states and 17713 transitions. [2023-12-02 15:04:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 15:04:47,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:47,378 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] [2023-12-02 15:04:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 15:04:47,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:47,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1860348150, now seen corresponding path program 1 times [2023-12-02 15:04:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:47,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513370547] [2023-12-02 15:04:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:47,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:47,598 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 15:04:47,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513370547] [2023-12-02 15:04:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513370547] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:47,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:47,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:04:47,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564314505] [2023-12-02 15:04:47,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:04:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:04:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:04:47,601 INFO L87 Difference]: Start difference. First operand 13133 states and 17713 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 15:04:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:48,319 INFO L93 Difference]: Finished difference Result 33688 states and 46080 transitions. [2023-12-02 15:04:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:04:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 80 [2023-12-02 15:04:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:48,346 INFO L225 Difference]: With dead ends: 33688 [2023-12-02 15:04:48,346 INFO L226 Difference]: Without dead ends: 21338 [2023-12-02 15:04:48,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:48,358 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 4129 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:48,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4129 Valid, 943 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:04:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21338 states. [2023-12-02 15:04:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21338 to 21336. [2023-12-02 15:04:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21336 states, 21335 states have (on average 1.359971877197094) internal successors, (29015), 21335 states have internal predecessors, (29015), 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 15:04:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21336 states to 21336 states and 29015 transitions. [2023-12-02 15:04:48,583 INFO L78 Accepts]: Start accepts. Automaton has 21336 states and 29015 transitions. Word has length 80 [2023-12-02 15:04:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:48,584 INFO L495 AbstractCegarLoop]: Abstraction has 21336 states and 29015 transitions. [2023-12-02 15:04:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 15:04:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 21336 states and 29015 transitions. [2023-12-02 15:04:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 15:04:48,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:48,595 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] [2023-12-02 15:04:48,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:04:48,595 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:48,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2048024899, now seen corresponding path program 1 times [2023-12-02 15:04:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:48,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183134552] [2023-12-02 15:04:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:48,698 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 15:04:48,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:48,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183134552] [2023-12-02 15:04:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183134552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:48,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:48,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:04:48,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855192819] [2023-12-02 15:04:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:04:48,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:04:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:04:48,700 INFO L87 Difference]: Start difference. First operand 21336 states and 29015 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 15:04:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:48,894 INFO L93 Difference]: Finished difference Result 53411 states and 73126 transitions. [2023-12-02 15:04:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:04:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2023-12-02 15:04:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:48,929 INFO L225 Difference]: With dead ends: 53411 [2023-12-02 15:04:48,929 INFO L226 Difference]: Without dead ends: 35844 [2023-12-02 15:04:48,945 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 15:04:48,946 INFO L413 NwaCegarLoop]: 1626 mSDtfsCounter, 1028 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:48,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 2457 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:04:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35844 states. [2023-12-02 15:04:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35844 to 35842. [2023-12-02 15:04:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35842 states, 35841 states have (on average 1.3541474847241985) internal successors, (48534), 35841 states have internal predecessors, (48534), 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 15:04:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35842 states to 35842 states and 48534 transitions. [2023-12-02 15:04:49,290 INFO L78 Accepts]: Start accepts. Automaton has 35842 states and 48534 transitions. Word has length 81 [2023-12-02 15:04:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:49,291 INFO L495 AbstractCegarLoop]: Abstraction has 35842 states and 48534 transitions. [2023-12-02 15:04:49,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 15:04:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 35842 states and 48534 transitions. [2023-12-02 15:04:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 15:04:49,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:49,305 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] [2023-12-02 15:04:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 15:04:49,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:49,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -963543678, now seen corresponding path program 1 times [2023-12-02 15:04:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:49,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696441667] [2023-12-02 15:04:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:49,466 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 15:04:49,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696441667] [2023-12-02 15:04:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696441667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:49,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:04:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481556683] [2023-12-02 15:04:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:49,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:04:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:04:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:04:49,468 INFO L87 Difference]: Start difference. First operand 35842 states and 48534 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 15:04:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:50,232 INFO L93 Difference]: Finished difference Result 97201 states and 132411 transitions. [2023-12-02 15:04:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:04:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2023-12-02 15:04:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:50,300 INFO L225 Difference]: With dead ends: 97201 [2023-12-02 15:04:50,301 INFO L226 Difference]: Without dead ends: 62631 [2023-12-02 15:04:50,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:50,324 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 3546 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:50,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 775 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:04:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62631 states. [2023-12-02 15:04:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62631 to 62629. [2023-12-02 15:04:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62629 states, 62628 states have (on average 1.3544101679759852) internal successors, (84824), 62628 states have internal predecessors, (84824), 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 15:04:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62629 states to 62629 states and 84824 transitions. [2023-12-02 15:04:51,082 INFO L78 Accepts]: Start accepts. Automaton has 62629 states and 84824 transitions. Word has length 82 [2023-12-02 15:04:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:51,082 INFO L495 AbstractCegarLoop]: Abstraction has 62629 states and 84824 transitions. [2023-12-02 15:04:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 15:04:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 62629 states and 84824 transitions. [2023-12-02 15:04:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:04:51,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:51,106 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] [2023-12-02 15:04:51,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 15:04:51,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:51,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash 940732972, now seen corresponding path program 1 times [2023-12-02 15:04:51,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:51,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036102109] [2023-12-02 15:04:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:51,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:51,294 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 15:04:51,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:51,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036102109] [2023-12-02 15:04:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036102109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:51,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:04:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517728759] [2023-12-02 15:04:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:51,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:04:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:04:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:51,296 INFO L87 Difference]: Start difference. First operand 62629 states and 84824 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:04:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:52,877 INFO L93 Difference]: Finished difference Result 246224 states and 333261 transitions. [2023-12-02 15:04:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:04:52,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 83 [2023-12-02 15:04:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:53,272 INFO L225 Difference]: With dead ends: 246224 [2023-12-02 15:04:53,273 INFO L226 Difference]: Without dead ends: 218781 [2023-12-02 15:04:53,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:04:53,305 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 5679 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5679 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:53,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5679 Valid, 1616 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:04:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218781 states. [2023-12-02 15:04:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218781 to 62685. [2023-12-02 15:04:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62685 states, 62684 states have (on average 1.3543487971412163) internal successors, (84896), 62684 states have internal predecessors, (84896), 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 15:04:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62685 states to 62685 states and 84896 transitions. [2023-12-02 15:04:55,084 INFO L78 Accepts]: Start accepts. Automaton has 62685 states and 84896 transitions. Word has length 83 [2023-12-02 15:04:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:55,085 INFO L495 AbstractCegarLoop]: Abstraction has 62685 states and 84896 transitions. [2023-12-02 15:04:55,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:04:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 62685 states and 84896 transitions. [2023-12-02 15:04:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:04:55,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:55,212 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] [2023-12-02 15:04:55,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:04:55,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:55,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:55,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1898621657, now seen corresponding path program 1 times [2023-12-02 15:04:55,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:55,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463972284] [2023-12-02 15:04:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:55,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:55,474 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 15:04:55,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463972284] [2023-12-02 15:04:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463972284] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:55,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:55,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:04:55,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569137156] [2023-12-02 15:04:55,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:04:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:04:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:55,476 INFO L87 Difference]: Start difference. First operand 62685 states and 84896 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:04:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:04:57,366 INFO L93 Difference]: Finished difference Result 266542 states and 361402 transitions. [2023-12-02 15:04:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:04:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 83 [2023-12-02 15:04:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:04:57,618 INFO L225 Difference]: With dead ends: 266542 [2023-12-02 15:04:57,618 INFO L226 Difference]: Without dead ends: 240832 [2023-12-02 15:04:57,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:04:57,657 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 4718 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4718 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:04:57,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4718 Valid, 1729 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 15:04:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240832 states. [2023-12-02 15:04:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240832 to 62908. [2023-12-02 15:04:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62908 states, 62907 states have (on average 1.3544597580555424) internal successors, (85205), 62907 states have internal predecessors, (85205), 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 15:04:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62908 states to 62908 states and 85205 transitions. [2023-12-02 15:04:59,435 INFO L78 Accepts]: Start accepts. Automaton has 62908 states and 85205 transitions. Word has length 83 [2023-12-02 15:04:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:04:59,435 INFO L495 AbstractCegarLoop]: Abstraction has 62908 states and 85205 transitions. [2023-12-02 15:04:59,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:04:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 62908 states and 85205 transitions. [2023-12-02 15:04:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:04:59,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:04:59,449 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] [2023-12-02 15:04:59,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 15:04:59,450 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:04:59,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:04:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2012790539, now seen corresponding path program 1 times [2023-12-02 15:04:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:04:59,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698641460] [2023-12-02 15:04:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:04:59,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:04:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:04:59,777 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 15:04:59,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:04:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698641460] [2023-12-02 15:04:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698641460] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:04:59,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:04:59,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:04:59,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254463363] [2023-12-02 15:04:59,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:04:59,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:04:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:04:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:04:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:04:59,779 INFO L87 Difference]: Start difference. First operand 62908 states and 85205 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:05:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:01,505 INFO L93 Difference]: Finished difference Result 350726 states and 479979 transitions. [2023-12-02 15:05:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:01,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 83 [2023-12-02 15:05:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:02,016 INFO L225 Difference]: With dead ends: 350726 [2023-12-02 15:05:02,016 INFO L226 Difference]: Without dead ends: 323210 [2023-12-02 15:05:02,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:02,051 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 6428 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6428 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:02,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6428 Valid, 1639 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:05:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323210 states. [2023-12-02 15:05:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323210 to 63044. [2023-12-02 15:05:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63044 states, 63043 states have (on average 1.3543295845692622) internal successors, (85381), 63043 states have internal predecessors, (85381), 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 15:05:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63044 states to 63044 states and 85381 transitions. [2023-12-02 15:05:04,418 INFO L78 Accepts]: Start accepts. Automaton has 63044 states and 85381 transitions. Word has length 83 [2023-12-02 15:05:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:04,418 INFO L495 AbstractCegarLoop]: Abstraction has 63044 states and 85381 transitions. [2023-12-02 15:05:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:05:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 63044 states and 85381 transitions. [2023-12-02 15:05:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:05:04,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:04,431 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] [2023-12-02 15:05:04,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 15:05:04,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:04,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:04,432 INFO L85 PathProgramCache]: Analyzing trace with hash 598779131, now seen corresponding path program 1 times [2023-12-02 15:05:04,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:04,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106357718] [2023-12-02 15:05:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:04,670 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 15:05:04,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:04,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106357718] [2023-12-02 15:05:04,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106357718] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:04,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:04,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:04,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277376456] [2023-12-02 15:05:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:04,672 INFO L87 Difference]: Start difference. First operand 63044 states and 85381 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:05:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:06,378 INFO L93 Difference]: Finished difference Result 323904 states and 442020 transitions. [2023-12-02 15:05:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 83 [2023-12-02 15:05:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:06,705 INFO L225 Difference]: With dead ends: 323904 [2023-12-02 15:05:06,705 INFO L226 Difference]: Without dead ends: 296454 [2023-12-02 15:05:06,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:06,758 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 5996 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5996 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:06,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5996 Valid, 1617 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:05:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296454 states. [2023-12-02 15:05:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296454 to 63377. [2023-12-02 15:05:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63377 states, 63376 states have (on average 1.3541719262812422) internal successors, (85822), 63376 states have internal predecessors, (85822), 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 15:05:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63377 states to 63377 states and 85822 transitions. [2023-12-02 15:05:09,092 INFO L78 Accepts]: Start accepts. Automaton has 63377 states and 85822 transitions. Word has length 83 [2023-12-02 15:05:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:09,093 INFO L495 AbstractCegarLoop]: Abstraction has 63377 states and 85822 transitions. [2023-12-02 15:05:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:05:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 63377 states and 85822 transitions. [2023-12-02 15:05:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:05:09,107 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:09,107 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] [2023-12-02 15:05:09,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 15:05:09,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:09,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 65724815, now seen corresponding path program 1 times [2023-12-02 15:05:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:09,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14110530] [2023-12-02 15:05:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:09,345 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 15:05:09,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14110530] [2023-12-02 15:05:09,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14110530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:09,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:09,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:09,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491218507] [2023-12-02 15:05:09,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:09,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:09,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:09,347 INFO L87 Difference]: Start difference. First operand 63377 states and 85822 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:05:10,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:10,920 INFO L93 Difference]: Finished difference Result 296686 states and 403553 transitions. [2023-12-02 15:05:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:10,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 83 [2023-12-02 15:05:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:11,213 INFO L225 Difference]: With dead ends: 296686 [2023-12-02 15:05:11,421 INFO L226 Difference]: Without dead ends: 269884 [2023-12-02 15:05:11,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:11,461 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 5706 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5706 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:11,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5706 Valid, 1604 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:05:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269884 states. [2023-12-02 15:05:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269884 to 63953. [2023-12-02 15:05:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63953 states, 63952 states have (on average 1.3540155116337254) internal successors, (86592), 63952 states have internal predecessors, (86592), 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 15:05:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63953 states to 63953 states and 86592 transitions. [2023-12-02 15:05:13,385 INFO L78 Accepts]: Start accepts. Automaton has 63953 states and 86592 transitions. Word has length 83 [2023-12-02 15:05:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:13,385 INFO L495 AbstractCegarLoop]: Abstraction has 63953 states and 86592 transitions. [2023-12-02 15:05:13,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 15:05:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63953 states and 86592 transitions. [2023-12-02 15:05:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:13,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:13,396 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] [2023-12-02 15:05:13,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 15:05:13,397 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:13,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 243433032, now seen corresponding path program 1 times [2023-12-02 15:05:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:13,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097121690] [2023-12-02 15:05:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:13,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:13,817 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 15:05:13,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:13,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097121690] [2023-12-02 15:05:13,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097121690] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:13,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:13,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:13,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531194192] [2023-12-02 15:05:13,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:13,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:13,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:13,819 INFO L87 Difference]: Start difference. First operand 63953 states and 86592 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:15,599 INFO L93 Difference]: Finished difference Result 197469 states and 268004 transitions. [2023-12-02 15:05:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 15:05:15,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:15,739 INFO L225 Difference]: With dead ends: 197469 [2023-12-02 15:05:15,739 INFO L226 Difference]: Without dead ends: 146643 [2023-12-02 15:05:15,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:05:15,779 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 4165 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:15,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4165 Valid, 2855 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:05:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146643 states. [2023-12-02 15:05:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146643 to 63885. [2023-12-02 15:05:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63885 states, 63884 states have (on average 1.3538288147266921) internal successors, (86488), 63884 states have internal predecessors, (86488), 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 15:05:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63885 states to 63885 states and 86488 transitions. [2023-12-02 15:05:17,093 INFO L78 Accepts]: Start accepts. Automaton has 63885 states and 86488 transitions. Word has length 84 [2023-12-02 15:05:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:17,093 INFO L495 AbstractCegarLoop]: Abstraction has 63885 states and 86488 transitions. [2023-12-02 15:05:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 63885 states and 86488 transitions. [2023-12-02 15:05:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:17,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:17,104 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] [2023-12-02 15:05:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 15:05:17,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1447975722, now seen corresponding path program 1 times [2023-12-02 15:05:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516522917] [2023-12-02 15:05:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:17,275 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 15:05:17,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:17,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516522917] [2023-12-02 15:05:17,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516522917] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:17,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:17,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372041825] [2023-12-02 15:05:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:17,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:17,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:17,278 INFO L87 Difference]: Start difference. First operand 63885 states and 86488 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:18,973 INFO L93 Difference]: Finished difference Result 293199 states and 399096 transitions. [2023-12-02 15:05:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:19,262 INFO L225 Difference]: With dead ends: 293199 [2023-12-02 15:05:19,262 INFO L226 Difference]: Without dead ends: 267269 [2023-12-02 15:05:19,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:19,296 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 4839 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4839 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:19,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4839 Valid, 1713 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:05:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267269 states. [2023-12-02 15:05:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267269 to 64005. [2023-12-02 15:05:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64005 states, 64004 states have (on average 1.3537903881007438) internal successors, (86648), 64004 states have internal predecessors, (86648), 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 15:05:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64005 states to 64005 states and 86648 transitions. [2023-12-02 15:05:21,228 INFO L78 Accepts]: Start accepts. Automaton has 64005 states and 86648 transitions. Word has length 84 [2023-12-02 15:05:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:21,228 INFO L495 AbstractCegarLoop]: Abstraction has 64005 states and 86648 transitions. [2023-12-02 15:05:21,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 64005 states and 86648 transitions. [2023-12-02 15:05:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:21,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:21,239 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] [2023-12-02 15:05:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 15:05:21,240 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:21,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1846361066, now seen corresponding path program 1 times [2023-12-02 15:05:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131664557] [2023-12-02 15:05:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:21,401 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 15:05:21,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131664557] [2023-12-02 15:05:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131664557] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:21,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:21,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:21,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720336237] [2023-12-02 15:05:21,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:21,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:21,402 INFO L87 Difference]: Start difference. First operand 64005 states and 86648 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:23,217 INFO L93 Difference]: Finished difference Result 267889 states and 363155 transitions. [2023-12-02 15:05:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:23,456 INFO L225 Difference]: With dead ends: 267889 [2023-12-02 15:05:23,456 INFO L226 Difference]: Without dead ends: 242143 [2023-12-02 15:05:23,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:23,482 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 4706 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:23,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4706 Valid, 1730 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:05:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242143 states. [2023-12-02 15:05:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242143 to 64295. [2023-12-02 15:05:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64295 states, 64294 states have (on average 1.353967710828382) internal successors, (87052), 64294 states have internal predecessors, (87052), 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 15:05:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64295 states to 64295 states and 87052 transitions. [2023-12-02 15:05:25,447 INFO L78 Accepts]: Start accepts. Automaton has 64295 states and 87052 transitions. Word has length 84 [2023-12-02 15:05:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:25,447 INFO L495 AbstractCegarLoop]: Abstraction has 64295 states and 87052 transitions. [2023-12-02 15:05:25,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64295 states and 87052 transitions. [2023-12-02 15:05:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:25,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:25,458 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] [2023-12-02 15:05:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 15:05:25,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:25,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash -860991493, now seen corresponding path program 1 times [2023-12-02 15:05:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:25,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44995599] [2023-12-02 15:05:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:25,826 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 15:05:25,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:25,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44995599] [2023-12-02 15:05:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44995599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430994094] [2023-12-02 15:05:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:25,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:25,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:25,828 INFO L87 Difference]: Start difference. First operand 64295 states and 87052 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:27,695 INFO L93 Difference]: Finished difference Result 197795 states and 268506 transitions. [2023-12-02 15:05:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 15:05:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:27,817 INFO L225 Difference]: With dead ends: 197795 [2023-12-02 15:05:27,818 INFO L226 Difference]: Without dead ends: 146955 [2023-12-02 15:05:27,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:05:27,836 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 4194 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4194 SdHoareTripleChecker+Valid, 2848 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:27,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4194 Valid, 2848 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:05:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146955 states. [2023-12-02 15:05:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146955 to 64220. [2023-12-02 15:05:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64220 states, 64219 states have (on average 1.353867235553341) internal successors, (86944), 64219 states have internal predecessors, (86944), 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 15:05:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64220 states to 64220 states and 86944 transitions. [2023-12-02 15:05:28,964 INFO L78 Accepts]: Start accepts. Automaton has 64220 states and 86944 transitions. Word has length 84 [2023-12-02 15:05:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:28,964 INFO L495 AbstractCegarLoop]: Abstraction has 64220 states and 86944 transitions. [2023-12-02 15:05:28,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 64220 states and 86944 transitions. [2023-12-02 15:05:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:28,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:28,981 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] [2023-12-02 15:05:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 15:05:28,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:28,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1078841363, now seen corresponding path program 1 times [2023-12-02 15:05:28,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:28,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035001358] [2023-12-02 15:05:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:29,185 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 15:05:29,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035001358] [2023-12-02 15:05:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035001358] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:29,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:29,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352380566] [2023-12-02 15:05:29,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:29,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:29,187 INFO L87 Difference]: Start difference. First operand 64220 states and 86944 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:30,986 INFO L93 Difference]: Finished difference Result 320302 states and 437450 transitions. [2023-12-02 15:05:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:31,304 INFO L225 Difference]: With dead ends: 320302 [2023-12-02 15:05:31,304 INFO L226 Difference]: Without dead ends: 294298 [2023-12-02 15:05:31,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:31,357 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 4993 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4993 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:31,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4993 Valid, 1741 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:05:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294298 states. [2023-12-02 15:05:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294298 to 64295. [2023-12-02 15:05:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64295 states, 64294 states have (on average 1.3538432824213769) internal successors, (87044), 64294 states have internal predecessors, (87044), 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 15:05:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64295 states to 64295 states and 87044 transitions. [2023-12-02 15:05:33,705 INFO L78 Accepts]: Start accepts. Automaton has 64295 states and 87044 transitions. Word has length 84 [2023-12-02 15:05:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:33,705 INFO L495 AbstractCegarLoop]: Abstraction has 64295 states and 87044 transitions. [2023-12-02 15:05:33,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 64295 states and 87044 transitions. [2023-12-02 15:05:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:33,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:33,717 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] [2023-12-02 15:05:33,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 15:05:33,717 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:33,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -751519819, now seen corresponding path program 1 times [2023-12-02 15:05:33,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:33,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200665829] [2023-12-02 15:05:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:33,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:34,134 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 15:05:34,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200665829] [2023-12-02 15:05:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200665829] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:34,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:34,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:34,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965143649] [2023-12-02 15:05:34,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:34,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:34,136 INFO L87 Difference]: Start difference. First operand 64295 states and 87044 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:35,934 INFO L93 Difference]: Finished difference Result 210621 states and 285931 transitions. [2023-12-02 15:05:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:05:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:36,089 INFO L225 Difference]: With dead ends: 210621 [2023-12-02 15:05:36,089 INFO L226 Difference]: Without dead ends: 158899 [2023-12-02 15:05:36,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:05:36,132 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 3818 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3818 SdHoareTripleChecker+Valid, 3333 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:36,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3818 Valid, 3333 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:05:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158899 states. [2023-12-02 15:05:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158899 to 63764. [2023-12-02 15:05:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63764 states, 63763 states have (on average 1.3538102034095008) internal successors, (86323), 63763 states have internal predecessors, (86323), 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 15:05:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63764 states to 63764 states and 86323 transitions. [2023-12-02 15:05:37,703 INFO L78 Accepts]: Start accepts. Automaton has 63764 states and 86323 transitions. Word has length 84 [2023-12-02 15:05:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:37,703 INFO L495 AbstractCegarLoop]: Abstraction has 63764 states and 86323 transitions. [2023-12-02 15:05:37,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 63764 states and 86323 transitions. [2023-12-02 15:05:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:37,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:37,720 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] [2023-12-02 15:05:37,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 15:05:37,720 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:37,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 285861585, now seen corresponding path program 1 times [2023-12-02 15:05:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:37,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349275884] [2023-12-02 15:05:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:37,920 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 15:05:37,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:37,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349275884] [2023-12-02 15:05:37,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349275884] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:37,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:37,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609610568] [2023-12-02 15:05:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:37,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:37,922 INFO L87 Difference]: Start difference. First operand 63764 states and 86323 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:39,514 INFO L93 Difference]: Finished difference Result 266966 states and 361901 transitions. [2023-12-02 15:05:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:05:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:40,021 INFO L225 Difference]: With dead ends: 266966 [2023-12-02 15:05:40,022 INFO L226 Difference]: Without dead ends: 241220 [2023-12-02 15:05:40,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:05:40,052 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 4696 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4696 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:40,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4696 Valid, 1729 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:05:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241220 states. [2023-12-02 15:05:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241220 to 64060. [2023-12-02 15:05:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64060 states, 64059 states have (on average 1.3540173902183925) internal successors, (86737), 64059 states have internal predecessors, (86737), 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 15:05:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64060 states to 64060 states and 86737 transitions. [2023-12-02 15:05:41,610 INFO L78 Accepts]: Start accepts. Automaton has 64060 states and 86737 transitions. Word has length 84 [2023-12-02 15:05:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:41,610 INFO L495 AbstractCegarLoop]: Abstraction has 64060 states and 86737 transitions. [2023-12-02 15:05:41,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 64060 states and 86737 transitions. [2023-12-02 15:05:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:41,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:41,621 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] [2023-12-02 15:05:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 15:05:41,622 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:41,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:41,622 INFO L85 PathProgramCache]: Analyzing trace with hash 684246929, now seen corresponding path program 1 times [2023-12-02 15:05:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398169756] [2023-12-02 15:05:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:41,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:42,117 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 15:05:42,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:42,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398169756] [2023-12-02 15:05:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398169756] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:42,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:42,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221454849] [2023-12-02 15:05:42,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:42,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:42,119 INFO L87 Difference]: Start difference. First operand 64060 states and 86737 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:43,788 INFO L93 Difference]: Finished difference Result 196663 states and 266816 transitions. [2023-12-02 15:05:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 15:05:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:43,930 INFO L225 Difference]: With dead ends: 196663 [2023-12-02 15:05:43,930 INFO L226 Difference]: Without dead ends: 145925 [2023-12-02 15:05:43,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:05:43,970 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 4089 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 2928 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:43,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4089 Valid, 2928 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:05:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145925 states. [2023-12-02 15:05:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145925 to 64036. [2023-12-02 15:05:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64036 states, 64035 states have (on average 1.353775279144218) internal successors, (86689), 64035 states have internal predecessors, (86689), 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 15:05:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64036 states to 64036 states and 86689 transitions. [2023-12-02 15:05:45,579 INFO L78 Accepts]: Start accepts. Automaton has 64036 states and 86689 transitions. Word has length 84 [2023-12-02 15:05:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:45,580 INFO L495 AbstractCegarLoop]: Abstraction has 64036 states and 86689 transitions. [2023-12-02 15:05:45,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 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 15:05:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 64036 states and 86689 transitions. [2023-12-02 15:05:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 15:05:45,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:45,591 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] [2023-12-02 15:05:45,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 15:05:45,591 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:45,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1953439629, now seen corresponding path program 1 times [2023-12-02 15:05:45,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:45,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407130648] [2023-12-02 15:05:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:45,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:45,958 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 15:05:45,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407130648] [2023-12-02 15:05:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407130648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:45,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:45,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:05:45,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525469947] [2023-12-02 15:05:45,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:45,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:45,960 INFO L87 Difference]: Start difference. First operand 64036 states and 86689 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:47,465 INFO L93 Difference]: Finished difference Result 182359 states and 247954 transitions. [2023-12-02 15:05:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:05:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 84 [2023-12-02 15:05:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:47,588 INFO L225 Difference]: With dead ends: 182359 [2023-12-02 15:05:47,588 INFO L226 Difference]: Without dead ends: 128571 [2023-12-02 15:05:47,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:05:47,624 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 3733 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3733 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:47,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3733 Valid, 2348 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:05:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128571 states. [2023-12-02 15:05:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128571 to 62701. [2023-12-02 15:05:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62701 states, 62700 states have (on average 1.352950558213716) internal successors, (84830), 62700 states have internal predecessors, (84830), 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 15:05:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62701 states to 62701 states and 84830 transitions. [2023-12-02 15:05:48,609 INFO L78 Accepts]: Start accepts. Automaton has 62701 states and 84830 transitions. Word has length 84 [2023-12-02 15:05:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:48,610 INFO L495 AbstractCegarLoop]: Abstraction has 62701 states and 84830 transitions. [2023-12-02 15:05:48,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 15:05:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 62701 states and 84830 transitions. [2023-12-02 15:05:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:05:48,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:48,620 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] [2023-12-02 15:05:48,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 15:05:48,620 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:48,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:48,621 INFO L85 PathProgramCache]: Analyzing trace with hash 958945421, now seen corresponding path program 1 times [2023-12-02 15:05:48,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:48,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141267881] [2023-12-02 15:05:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:49,593 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 15:05:49,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141267881] [2023-12-02 15:05:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141267881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:49,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:49,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 15:05:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228460572] [2023-12-02 15:05:49,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:49,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:05:49,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:49,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:05:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:05:49,595 INFO L87 Difference]: Start difference. First operand 62701 states and 84830 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:05:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:51,130 INFO L93 Difference]: Finished difference Result 284640 states and 388062 transitions. [2023-12-02 15:05:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:05:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 85 [2023-12-02 15:05:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:51,631 INFO L225 Difference]: With dead ends: 284640 [2023-12-02 15:05:51,631 INFO L226 Difference]: Without dead ends: 232217 [2023-12-02 15:05:51,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:05:51,668 INFO L413 NwaCegarLoop]: 1511 mSDtfsCounter, 6033 mSDsluCounter, 6090 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6033 SdHoareTripleChecker+Valid, 7601 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:51,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6033 Valid, 7601 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:05:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232217 states. [2023-12-02 15:05:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232217 to 60927. [2023-12-02 15:05:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60927 states, 60926 states have (on average 1.3539539769556512) internal successors, (82491), 60926 states have internal predecessors, (82491), 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 15:05:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60927 states to 60927 states and 82491 transitions. [2023-12-02 15:05:53,276 INFO L78 Accepts]: Start accepts. Automaton has 60927 states and 82491 transitions. Word has length 85 [2023-12-02 15:05:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:53,276 INFO L495 AbstractCegarLoop]: Abstraction has 60927 states and 82491 transitions. [2023-12-02 15:05:53,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:05:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 60927 states and 82491 transitions. [2023-12-02 15:05:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:05:53,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:53,289 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] [2023-12-02 15:05:53,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 15:05:53,290 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:53,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -634413027, now seen corresponding path program 1 times [2023-12-02 15:05:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:53,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213943244] [2023-12-02 15:05:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:53,653 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 15:05:53,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:53,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213943244] [2023-12-02 15:05:53,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213943244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:53,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:53,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718381313] [2023-12-02 15:05:53,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:53,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:53,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:53,655 INFO L87 Difference]: Start difference. First operand 60927 states and 82491 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 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 15:05:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:55,586 INFO L93 Difference]: Finished difference Result 193907 states and 263070 transitions. [2023-12-02 15:05:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:05:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 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 85 [2023-12-02 15:05:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:55,730 INFO L225 Difference]: With dead ends: 193907 [2023-12-02 15:05:55,730 INFO L226 Difference]: Without dead ends: 155753 [2023-12-02 15:05:55,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:05:55,764 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 3504 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:55,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 3074 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 15:05:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155753 states. [2023-12-02 15:05:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155753 to 60923. [2023-12-02 15:05:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60923 states, 60922 states have (on average 1.3539115590427104) internal successors, (82483), 60922 states have internal predecessors, (82483), 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 15:05:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60923 states to 60923 states and 82483 transitions. [2023-12-02 15:05:57,052 INFO L78 Accepts]: Start accepts. Automaton has 60923 states and 82483 transitions. Word has length 85 [2023-12-02 15:05:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:57,052 INFO L495 AbstractCegarLoop]: Abstraction has 60923 states and 82483 transitions. [2023-12-02 15:05:57,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 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 15:05:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 60923 states and 82483 transitions. [2023-12-02 15:05:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:05:57,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:57,062 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] [2023-12-02 15:05:57,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 15:05:57,062 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:05:57,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1044523368, now seen corresponding path program 1 times [2023-12-02 15:05:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943185702] [2023-12-02 15:05:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:57,834 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 15:05:57,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943185702] [2023-12-02 15:05:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943185702] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:57,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 15:05:57,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614783855] [2023-12-02 15:05:57,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:05:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:05:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:05:57,837 INFO L87 Difference]: Start difference. First operand 60923 states and 82483 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:05:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:59,641 INFO L93 Difference]: Finished difference Result 265708 states and 362865 transitions. [2023-12-02 15:05:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:05:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 85 [2023-12-02 15:05:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:59,869 INFO L225 Difference]: With dead ends: 265708 [2023-12-02 15:05:59,869 INFO L226 Difference]: Without dead ends: 214806 [2023-12-02 15:05:59,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:05:59,921 INFO L413 NwaCegarLoop]: 1370 mSDtfsCounter, 4674 mSDsluCounter, 6363 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4674 SdHoareTripleChecker+Valid, 7733 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:59,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4674 Valid, 7733 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 15:06:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214806 states. [2023-12-02 15:06:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214806 to 60711. [2023-12-02 15:06:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60711 states, 60710 states have (on average 1.353862625597101) internal successors, (82193), 60710 states have internal predecessors, (82193), 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 15:06:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60711 states to 60711 states and 82193 transitions. [2023-12-02 15:06:01,443 INFO L78 Accepts]: Start accepts. Automaton has 60711 states and 82193 transitions. Word has length 85 [2023-12-02 15:06:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:01,443 INFO L495 AbstractCegarLoop]: Abstraction has 60711 states and 82193 transitions. [2023-12-02 15:06:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:06:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 60711 states and 82193 transitions. [2023-12-02 15:06:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:06:01,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:01,452 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] [2023-12-02 15:06:01,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 15:06:01,452 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:01,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:01,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1551280976, now seen corresponding path program 1 times [2023-12-02 15:06:01,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:01,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386625076] [2023-12-02 15:06:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:01,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:02,026 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 15:06:02,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386625076] [2023-12-02 15:06:02,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386625076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:02,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:02,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:06:02,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585295522] [2023-12-02 15:06:02,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:02,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:06:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:06:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:06:02,028 INFO L87 Difference]: Start difference. First operand 60711 states and 82193 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 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 15:06:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:03,237 INFO L93 Difference]: Finished difference Result 234414 states and 319622 transitions. [2023-12-02 15:06:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:06:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 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 85 [2023-12-02 15:06:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:03,589 INFO L225 Difference]: With dead ends: 234414 [2023-12-02 15:06:03,589 INFO L226 Difference]: Without dead ends: 182981 [2023-12-02 15:06:03,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:06:03,610 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 3390 mSDsluCounter, 3337 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 4451 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:03,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3390 Valid, 4451 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:06:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182981 states. [2023-12-02 15:06:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182981 to 60043. [2023-12-02 15:06:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60043 states, 60042 states have (on average 1.3534525831917659) internal successors, (81264), 60042 states have internal predecessors, (81264), 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 15:06:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60043 states to 60043 states and 81264 transitions. [2023-12-02 15:06:04,846 INFO L78 Accepts]: Start accepts. Automaton has 60043 states and 81264 transitions. Word has length 85 [2023-12-02 15:06:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:04,846 INFO L495 AbstractCegarLoop]: Abstraction has 60043 states and 81264 transitions. [2023-12-02 15:06:04,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 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 15:06:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 60043 states and 81264 transitions. [2023-12-02 15:06:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:06:04,861 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:04,861 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] [2023-12-02 15:06:04,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 15:06:04,861 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:04,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1453102197, now seen corresponding path program 1 times [2023-12-02 15:06:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:04,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492939458] [2023-12-02 15:06:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:05,500 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 15:06:05,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492939458] [2023-12-02 15:06:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492939458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:05,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:05,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 15:06:05,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178419043] [2023-12-02 15:06:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:05,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:06:05,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:05,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:06:05,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:06:05,502 INFO L87 Difference]: Start difference. First operand 60043 states and 81264 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:06:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:07,273 INFO L93 Difference]: Finished difference Result 277958 states and 379487 transitions. [2023-12-02 15:06:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:06:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 85 [2023-12-02 15:06:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:07,496 INFO L225 Difference]: With dead ends: 277958 [2023-12-02 15:06:07,496 INFO L226 Difference]: Without dead ends: 227136 [2023-12-02 15:06:07,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:06:07,531 INFO L413 NwaCegarLoop]: 1165 mSDtfsCounter, 5630 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5630 SdHoareTripleChecker+Valid, 5968 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:07,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5630 Valid, 5968 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:06:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227136 states. [2023-12-02 15:06:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227136 to 59911. [2023-12-02 15:06:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59911 states, 59910 states have (on average 1.3534301452178268) internal successors, (81084), 59910 states have internal predecessors, (81084), 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 15:06:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59911 states to 59911 states and 81084 transitions. [2023-12-02 15:06:08,973 INFO L78 Accepts]: Start accepts. Automaton has 59911 states and 81084 transitions. Word has length 85 [2023-12-02 15:06:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:08,973 INFO L495 AbstractCegarLoop]: Abstraction has 59911 states and 81084 transitions. [2023-12-02 15:06:08,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:06:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 59911 states and 81084 transitions. [2023-12-02 15:06:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:06:08,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:08,982 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] [2023-12-02 15:06:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 15:06:08,983 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:08,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash -342238671, now seen corresponding path program 1 times [2023-12-02 15:06:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:08,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253108355] [2023-12-02 15:06:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:08,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:09,673 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 15:06:09,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253108355] [2023-12-02 15:06:09,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253108355] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:09,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:09,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 15:06:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934351117] [2023-12-02 15:06:09,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:09,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:06:09,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:06:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:06:09,675 INFO L87 Difference]: Start difference. First operand 59911 states and 81084 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:06:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:11,259 INFO L93 Difference]: Finished difference Result 318334 states and 434065 transitions. [2023-12-02 15:06:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:06:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 85 [2023-12-02 15:06:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:11,546 INFO L225 Difference]: With dead ends: 318334 [2023-12-02 15:06:11,546 INFO L226 Difference]: Without dead ends: 266951 [2023-12-02 15:06:11,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:06:11,608 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 5477 mSDsluCounter, 5519 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5477 SdHoareTripleChecker+Valid, 6697 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:11,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5477 Valid, 6697 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:06:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266951 states. [2023-12-02 15:06:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266951 to 59176. [2023-12-02 15:06:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59176 states, 59175 states have (on average 1.3543219264892268) internal successors, (80142), 59175 states have internal predecessors, (80142), 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 15:06:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59176 states to 59176 states and 80142 transitions. [2023-12-02 15:06:13,415 INFO L78 Accepts]: Start accepts. Automaton has 59176 states and 80142 transitions. Word has length 85 [2023-12-02 15:06:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:13,415 INFO L495 AbstractCegarLoop]: Abstraction has 59176 states and 80142 transitions. [2023-12-02 15:06:13,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 15:06:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 59176 states and 80142 transitions. [2023-12-02 15:06:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 15:06:13,424 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:13,424 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] [2023-12-02 15:06:13,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 15:06:13,425 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:13,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -753788722, now seen corresponding path program 1 times [2023-12-02 15:06:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:13,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338449295] [2023-12-02 15:06:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:13,743 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 15:06:13,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:13,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338449295] [2023-12-02 15:06:13,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338449295] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:13,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:13,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:06:13,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289628574] [2023-12-02 15:06:13,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:06:13,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:13,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:06:13,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:06:13,745 INFO L87 Difference]: Start difference. First operand 59176 states and 80142 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 15:06:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:15,249 INFO L93 Difference]: Finished difference Result 204381 states and 277431 transitions. [2023-12-02 15:06:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:06:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 86 [2023-12-02 15:06:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:15,608 INFO L225 Difference]: With dead ends: 204381 [2023-12-02 15:06:15,608 INFO L226 Difference]: Without dead ends: 153133 [2023-12-02 15:06:15,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:06:15,633 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 3153 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3153 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:15,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3153 Valid, 2738 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:06:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153133 states. [2023-12-02 15:06:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153133 to 58870. [2023-12-02 15:06:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58870 states, 58869 states have (on average 1.3541762217805635) internal successors, (79719), 58869 states have internal predecessors, (79719), 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 15:06:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58870 states to 58870 states and 79719 transitions. [2023-12-02 15:06:16,841 INFO L78 Accepts]: Start accepts. Automaton has 58870 states and 79719 transitions. Word has length 86 [2023-12-02 15:06:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:16,841 INFO L495 AbstractCegarLoop]: Abstraction has 58870 states and 79719 transitions. [2023-12-02 15:06:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 15:06:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 58870 states and 79719 transitions. [2023-12-02 15:06:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 15:06:16,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:16,851 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] [2023-12-02 15:06:16,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 15:06:16,851 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:16,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash -243085203, now seen corresponding path program 1 times [2023-12-02 15:06:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727556659] [2023-12-02 15:06:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:16,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:16,920 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 15:06:16,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:16,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727556659] [2023-12-02 15:06:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727556659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:16,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:16,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:16,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22211911] [2023-12-02 15:06:16,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:16,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:16,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:16,922 INFO L87 Difference]: Start difference. First operand 58870 states and 79719 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 15:06:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:17,241 INFO L93 Difference]: Finished difference Result 112304 states and 152220 transitions. [2023-12-02 15:06:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2023-12-02 15:06:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:17,313 INFO L225 Difference]: With dead ends: 112304 [2023-12-02 15:06:17,313 INFO L226 Difference]: Without dead ends: 82615 [2023-12-02 15:06:17,336 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 15:06:17,337 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 606 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:17,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 708 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:06:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82615 states. [2023-12-02 15:06:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82615 to 82613. [2023-12-02 15:06:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82613 states, 82612 states have (on average 1.3549484336416018) internal successors, (111935), 82612 states have internal predecessors, (111935), 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 15:06:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82613 states to 82613 states and 111935 transitions. [2023-12-02 15:06:18,330 INFO L78 Accepts]: Start accepts. Automaton has 82613 states and 111935 transitions. Word has length 87 [2023-12-02 15:06:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 82613 states and 111935 transitions. [2023-12-02 15:06:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 15:06:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 82613 states and 111935 transitions. [2023-12-02 15:06:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 15:06:18,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:18,340 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] [2023-12-02 15:06:18,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-12-02 15:06:18,340 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:18,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 632736010, now seen corresponding path program 1 times [2023-12-02 15:06:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:18,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080554058] [2023-12-02 15:06:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:18,415 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 15:06:18,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080554058] [2023-12-02 15:06:18,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080554058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:18,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:18,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:18,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501192537] [2023-12-02 15:06:18,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:18,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:18,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:18,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:18,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:18,417 INFO L87 Difference]: Start difference. First operand 82613 states and 111935 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 15:06:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:18,651 INFO L93 Difference]: Finished difference Result 121747 states and 165083 transitions. [2023-12-02 15:06:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2023-12-02 15:06:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:18,736 INFO L225 Difference]: With dead ends: 121747 [2023-12-02 15:06:18,736 INFO L226 Difference]: Without dead ends: 82615 [2023-12-02 15:06:18,761 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 15:06:18,762 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 269 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:18,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1339 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82615 states. [2023-12-02 15:06:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82615 to 82613. [2023-12-02 15:06:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82613 states, 82612 states have (on average 1.3441267612453396) internal successors, (111041), 82612 states have internal predecessors, (111041), 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 15:06:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82613 states to 82613 states and 111041 transitions. [2023-12-02 15:06:19,849 INFO L78 Accepts]: Start accepts. Automaton has 82613 states and 111041 transitions. Word has length 87 [2023-12-02 15:06:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:19,850 INFO L495 AbstractCegarLoop]: Abstraction has 82613 states and 111041 transitions. [2023-12-02 15:06:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 15:06:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 82613 states and 111041 transitions. [2023-12-02 15:06:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 15:06:19,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:19,862 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] [2023-12-02 15:06:19,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 15:06:19,862 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:19,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1990993433, now seen corresponding path program 1 times [2023-12-02 15:06:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776394205] [2023-12-02 15:06:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:19,934 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 15:06:19,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776394205] [2023-12-02 15:06:19,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776394205] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:19,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:19,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216822872] [2023-12-02 15:06:19,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:19,936 INFO L87 Difference]: Start difference. First operand 82613 states and 111041 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 15:06:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:20,571 INFO L93 Difference]: Finished difference Result 141779 states and 190717 transitions. [2023-12-02 15:06:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2023-12-02 15:06:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:20,694 INFO L225 Difference]: With dead ends: 141779 [2023-12-02 15:06:20,694 INFO L226 Difference]: Without dead ends: 100327 [2023-12-02 15:06:20,719 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 15:06:20,720 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 481 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:20,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 692 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:06:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100327 states. [2023-12-02 15:06:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100327 to 80439. [2023-12-02 15:06:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80439 states, 80438 states have (on average 1.3420895596608569) internal successors, (107955), 80438 states have internal predecessors, (107955), 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 15:06:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80439 states to 80439 states and 107955 transitions. [2023-12-02 15:06:21,850 INFO L78 Accepts]: Start accepts. Automaton has 80439 states and 107955 transitions. Word has length 89 [2023-12-02 15:06:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:21,850 INFO L495 AbstractCegarLoop]: Abstraction has 80439 states and 107955 transitions. [2023-12-02 15:06:21,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 15:06:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 80439 states and 107955 transitions. [2023-12-02 15:06:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 15:06:21,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:21,860 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] [2023-12-02 15:06:21,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 15:06:21,861 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:21,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1643881943, now seen corresponding path program 1 times [2023-12-02 15:06:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851728911] [2023-12-02 15:06:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:22,381 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 15:06:22,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:22,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851728911] [2023-12-02 15:06:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851728911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 15:06:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783913274] [2023-12-02 15:06:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:06:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:06:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:06:22,384 INFO L87 Difference]: Start difference. First operand 80439 states and 107955 transitions. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 12 states have internal predecessors, (89), 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 15:06:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:24,780 INFO L93 Difference]: Finished difference Result 313810 states and 421657 transitions. [2023-12-02 15:06:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 15:06:24,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 12 states have internal predecessors, (89), 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 89 [2023-12-02 15:06:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:25,099 INFO L225 Difference]: With dead ends: 313810 [2023-12-02 15:06:25,099 INFO L226 Difference]: Without dead ends: 289223 [2023-12-02 15:06:25,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 15:06:25,147 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 4357 mSDsluCounter, 5782 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4357 SdHoareTripleChecker+Valid, 6734 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:25,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4357 Valid, 6734 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:06:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289223 states. [2023-12-02 15:06:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289223 to 80430. [2023-12-02 15:06:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80430 states, 80429 states have (on average 1.342015939524301) internal successors, (107937), 80429 states have internal predecessors, (107937), 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 15:06:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80430 states to 80430 states and 107937 transitions. [2023-12-02 15:06:26,715 INFO L78 Accepts]: Start accepts. Automaton has 80430 states and 107937 transitions. Word has length 89 [2023-12-02 15:06:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:26,715 INFO L495 AbstractCegarLoop]: Abstraction has 80430 states and 107937 transitions. [2023-12-02 15:06:26,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 12 states have internal predecessors, (89), 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 15:06:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 80430 states and 107937 transitions. [2023-12-02 15:06:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 15:06:26,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:26,730 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] [2023-12-02 15:06:26,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 15:06:26,730 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:26,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash -37520338, now seen corresponding path program 1 times [2023-12-02 15:06:26,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:26,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650507416] [2023-12-02 15:06:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:27,142 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 15:06:27,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650507416] [2023-12-02 15:06:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650507416] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:06:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191334576] [2023-12-02 15:06:27,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:06:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:06:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:06:27,144 INFO L87 Difference]: Start difference. First operand 80430 states and 107937 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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 15:06:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:27,714 INFO L93 Difference]: Finished difference Result 114078 states and 153158 transitions. [2023-12-02 15:06:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:06:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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 93 [2023-12-02 15:06:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:27,787 INFO L225 Difference]: With dead ends: 114078 [2023-12-02 15:06:27,788 INFO L226 Difference]: Without dead ends: 76675 [2023-12-02 15:06:27,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:06:27,812 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 1335 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:27,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 1979 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:06:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76675 states. [2023-12-02 15:06:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76675 to 62807. [2023-12-02 15:06:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62807 states, 62806 states have (on average 1.3322930930165908) internal successors, (83676), 62806 states have internal predecessors, (83676), 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 15:06:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62807 states to 62807 states and 83676 transitions. [2023-12-02 15:06:28,659 INFO L78 Accepts]: Start accepts. Automaton has 62807 states and 83676 transitions. Word has length 93 [2023-12-02 15:06:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:28,659 INFO L495 AbstractCegarLoop]: Abstraction has 62807 states and 83676 transitions. [2023-12-02 15:06:28,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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 15:06:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 62807 states and 83676 transitions. [2023-12-02 15:06:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 15:06:28,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:28,676 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] [2023-12-02 15:06:28,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 15:06:28,676 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:28,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 868752449, now seen corresponding path program 1 times [2023-12-02 15:06:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:28,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598922960] [2023-12-02 15:06:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:28,813 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 15:06:28,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:28,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598922960] [2023-12-02 15:06:28,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598922960] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:28,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:28,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:28,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979708647] [2023-12-02 15:06:28,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:28,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:28,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:28,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:28,814 INFO L87 Difference]: Start difference. First operand 62807 states and 83676 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 15:06:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:29,083 INFO L93 Difference]: Finished difference Result 133786 states and 179646 transitions. [2023-12-02 15:06:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 94 [2023-12-02 15:06:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:29,159 INFO L225 Difference]: With dead ends: 133786 [2023-12-02 15:06:29,159 INFO L226 Difference]: Without dead ends: 92164 [2023-12-02 15:06:29,184 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 15:06:29,184 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 160 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:29,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1058 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92164 states. [2023-12-02 15:06:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92164 to 87061. [2023-12-02 15:06:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87061 states, 87060 states have (on average 1.3261428899609464) internal successors, (115454), 87060 states have internal predecessors, (115454), 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 15:06:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87061 states to 87061 states and 115454 transitions. [2023-12-02 15:06:30,231 INFO L78 Accepts]: Start accepts. Automaton has 87061 states and 115454 transitions. Word has length 94 [2023-12-02 15:06:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:30,231 INFO L495 AbstractCegarLoop]: Abstraction has 87061 states and 115454 transitions. [2023-12-02 15:06:30,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 15:06:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 87061 states and 115454 transitions. [2023-12-02 15:06:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 15:06:30,245 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:30,245 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] [2023-12-02 15:06:30,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-12-02 15:06:30,245 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:30,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash 801894603, now seen corresponding path program 1 times [2023-12-02 15:06:30,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653510692] [2023-12-02 15:06:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:30,326 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 15:06:30,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:30,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653510692] [2023-12-02 15:06:30,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653510692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:30,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:30,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:30,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034561671] [2023-12-02 15:06:30,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:30,328 INFO L87 Difference]: Start difference. First operand 87061 states and 115454 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 15:06:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:30,554 INFO L93 Difference]: Finished difference Result 127116 states and 168817 transitions. [2023-12-02 15:06:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:30,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2023-12-02 15:06:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:30,627 INFO L225 Difference]: With dead ends: 127116 [2023-12-02 15:06:30,627 INFO L226 Difference]: Without dead ends: 85899 [2023-12-02 15:06:30,652 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 15:06:30,653 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 294 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:30,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1165 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85899 states. [2023-12-02 15:06:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85899 to 85897. [2023-12-02 15:06:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85897 states, 85896 states have (on average 1.3188274192046194) internal successors, (113282), 85896 states have internal predecessors, (113282), 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 15:06:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85897 states to 85897 states and 113282 transitions. [2023-12-02 15:06:31,698 INFO L78 Accepts]: Start accepts. Automaton has 85897 states and 113282 transitions. Word has length 97 [2023-12-02 15:06:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:31,698 INFO L495 AbstractCegarLoop]: Abstraction has 85897 states and 113282 transitions. [2023-12-02 15:06:31,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 15:06:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 85897 states and 113282 transitions. [2023-12-02 15:06:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 15:06:31,711 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:31,711 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] [2023-12-02 15:06:31,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-12-02 15:06:31,712 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:31,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 973021704, now seen corresponding path program 1 times [2023-12-02 15:06:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:31,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78309893] [2023-12-02 15:06:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:31,835 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 15:06:31,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78309893] [2023-12-02 15:06:31,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78309893] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:31,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:31,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790528070] [2023-12-02 15:06:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:31,837 INFO L87 Difference]: Start difference. First operand 85897 states and 113282 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 15:06:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:32,452 INFO L93 Difference]: Finished difference Result 187513 states and 248940 transitions. [2023-12-02 15:06:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2023-12-02 15:06:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:32,571 INFO L225 Difference]: With dead ends: 187513 [2023-12-02 15:06:32,571 INFO L226 Difference]: Without dead ends: 128759 [2023-12-02 15:06:32,603 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 15:06:32,604 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 148 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:32,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1047 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128759 states. [2023-12-02 15:06:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128759 to 121133. [2023-12-02 15:06:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121133 states, 121132 states have (on average 1.3100254268071194) internal successors, (158686), 121132 states have internal predecessors, (158686), 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 15:06:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121133 states to 121133 states and 158686 transitions. [2023-12-02 15:06:33,915 INFO L78 Accepts]: Start accepts. Automaton has 121133 states and 158686 transitions. Word has length 97 [2023-12-02 15:06:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:33,915 INFO L495 AbstractCegarLoop]: Abstraction has 121133 states and 158686 transitions. [2023-12-02 15:06:33,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 15:06:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 121133 states and 158686 transitions. [2023-12-02 15:06:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 15:06:33,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:33,928 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] [2023-12-02 15:06:33,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-12-02 15:06:33,928 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:33,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 519218350, now seen corresponding path program 1 times [2023-12-02 15:06:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:33,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558005749] [2023-12-02 15:06:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:33,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:34,008 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 15:06:34,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558005749] [2023-12-02 15:06:34,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558005749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:34,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:34,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:34,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970942542] [2023-12-02 15:06:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:34,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:34,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:34,010 INFO L87 Difference]: Start difference. First operand 121133 states and 158686 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 15:06:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:34,662 INFO L93 Difference]: Finished difference Result 172829 states and 226627 transitions. [2023-12-02 15:06:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 100 [2023-12-02 15:06:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:34,772 INFO L225 Difference]: With dead ends: 172829 [2023-12-02 15:06:34,772 INFO L226 Difference]: Without dead ends: 117787 [2023-12-02 15:06:34,794 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 15:06:34,795 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 285 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:34,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1157 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117787 states. [2023-12-02 15:06:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117787 to 117785. [2023-12-02 15:06:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117785 states, 117784 states have (on average 1.3022481831148542) internal successors, (153384), 117784 states have internal predecessors, (153384), 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 15:06:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117785 states to 117785 states and 153384 transitions. [2023-12-02 15:06:36,030 INFO L78 Accepts]: Start accepts. Automaton has 117785 states and 153384 transitions. Word has length 100 [2023-12-02 15:06:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:36,031 INFO L495 AbstractCegarLoop]: Abstraction has 117785 states and 153384 transitions. [2023-12-02 15:06:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 15:06:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 117785 states and 153384 transitions. [2023-12-02 15:06:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 15:06:36,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:36,042 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] [2023-12-02 15:06:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 15:06:36,042 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:36,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash -659817668, now seen corresponding path program 1 times [2023-12-02 15:06:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720607575] [2023-12-02 15:06:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:36,165 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 15:06:36,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:36,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720607575] [2023-12-02 15:06:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720607575] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:36,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:36,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89340447] [2023-12-02 15:06:36,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:36,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:36,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:36,167 INFO L87 Difference]: Start difference. First operand 117785 states and 153384 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 15:06:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:36,640 INFO L93 Difference]: Finished difference Result 259757 states and 340366 transitions. [2023-12-02 15:06:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 100 [2023-12-02 15:06:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:36,805 INFO L225 Difference]: With dead ends: 259757 [2023-12-02 15:06:36,805 INFO L226 Difference]: Without dead ends: 176355 [2023-12-02 15:06:36,855 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 15:06:36,855 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 135 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:36,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1033 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176355 states. [2023-12-02 15:06:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176355 to 165481. [2023-12-02 15:06:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165481 states, 165480 states have (on average 1.292289098380469) internal successors, (213848), 165480 states have internal predecessors, (213848), 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 15:06:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165481 states to 165481 states and 213848 transitions. [2023-12-02 15:06:38,738 INFO L78 Accepts]: Start accepts. Automaton has 165481 states and 213848 transitions. Word has length 100 [2023-12-02 15:06:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:38,738 INFO L495 AbstractCegarLoop]: Abstraction has 165481 states and 213848 transitions. [2023-12-02 15:06:38,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 15:06:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 165481 states and 213848 transitions. [2023-12-02 15:06:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 15:06:38,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:38,750 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] [2023-12-02 15:06:38,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 15:06:38,751 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:38,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:38,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1424849301, now seen corresponding path program 1 times [2023-12-02 15:06:38,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:38,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159391172] [2023-12-02 15:06:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:38,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:38,838 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 15:06:38,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159391172] [2023-12-02 15:06:38,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159391172] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:38,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:38,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:38,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786425730] [2023-12-02 15:06:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:38,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:38,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:38,839 INFO L87 Difference]: Start difference. First operand 165481 states and 213848 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 15:06:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:39,583 INFO L93 Difference]: Finished difference Result 220638 states and 285199 transitions. [2023-12-02 15:06:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:06:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 103 [2023-12-02 15:06:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:39,720 INFO L225 Difference]: With dead ends: 220638 [2023-12-02 15:06:39,720 INFO L226 Difference]: Without dead ends: 148185 [2023-12-02 15:06:39,754 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 15:06:39,754 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 268 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:39,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1127 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:06:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148185 states. [2023-12-02 15:06:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148185 to 148183. [2023-12-02 15:06:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148183 states, 148182 states have (on average 1.2837186702838401) internal successors, (190224), 148182 states have internal predecessors, (190224), 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 15:06:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148183 states to 148183 states and 190224 transitions. [2023-12-02 15:06:41,255 INFO L78 Accepts]: Start accepts. Automaton has 148183 states and 190224 transitions. Word has length 103 [2023-12-02 15:06:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:41,255 INFO L495 AbstractCegarLoop]: Abstraction has 148183 states and 190224 transitions. [2023-12-02 15:06:41,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 15:06:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 148183 states and 190224 transitions. [2023-12-02 15:06:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 15:06:41,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:41,266 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] [2023-12-02 15:06:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-12-02 15:06:41,266 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:06:41,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1367951210, now seen corresponding path program 1 times [2023-12-02 15:06:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874655211] [2023-12-02 15:06:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:41,393 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 15:06:41,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:41,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874655211] [2023-12-02 15:06:41,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874655211] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:41,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:41,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:41,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284611064] [2023-12-02 15:06:41,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:41,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:06:41,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:41,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:06:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:06:41,395 INFO L87 Difference]: Start difference. First operand 148183 states and 190224 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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)