./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-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_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/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_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/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_cf587c75-7d8a-4b16-80d7-94be28c10bb1/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 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:39:56,605 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:39:56,670 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:39:56,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:39:56,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:39:56,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:39:56,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:39:56,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:39:56,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:39:56,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:39:56,703 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:39:56,704 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:39:56,704 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:39:56,705 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:39:56,705 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:39:56,706 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:39:56,706 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:39:56,707 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:39:56,707 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:39:56,707 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:39:56,708 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:39:56,708 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:39:56,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:39:56,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:39:56,710 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:39:56,710 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:39:56,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:39:56,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:39:56,711 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:39:56,712 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:39:56,712 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:39:56,712 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:39:56,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:39:56,713 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:39:56,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:39:56,713 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:39:56,713 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:39:56,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:39:56,714 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:39:56,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:39:56,714 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:39:56,714 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:39:56,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:39:56,715 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:39:56,715 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:39:56,715 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:39:56,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:39:56,715 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_cf587c75-7d8a-4b16-80d7-94be28c10bb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c [2023-12-02 17:39:56,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:39:56,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:39:56,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:39:56,961 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:39:56,961 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:39:56,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-12-02 17:39:59,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:39:59,954 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:39:59,955 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-12-02 17:39:59,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/data/293905761/6336cebb38b842858b620ac1d36587da/FLAGf813eca00 [2023-12-02 17:39:59,983 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/data/293905761/6336cebb38b842858b620ac1d36587da [2023-12-02 17:39:59,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:39:59,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:39:59,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:39:59,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:39:59,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:39:59,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:39:59" (1/1) ... [2023-12-02 17:39:59,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b5f937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:39:59, skipping insertion in model container [2023-12-02 17:39:59,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:39:59" (1/1) ... [2023-12-02 17:40:00,046 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:40:00,282 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_cf587c75-7d8a-4b16-80d7-94be28c10bb1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2023-12-02 17:40:00,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:40:00,368 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:40:00,426 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_cf587c75-7d8a-4b16-80d7-94be28c10bb1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2023-12-02 17:40:00,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:40:00,476 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:40:00,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00 WrapperNode [2023-12-02 17:40:00,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:40:00,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:40:00,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:40:00,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:40:00,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,536 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 869 [2023-12-02 17:40:00,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:40:00,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:40:00,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:40:00,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:40:00,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,549 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,550 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,582 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:40:00,589 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:40:00,589 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:40:00,589 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:40:00,590 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (1/1) ... [2023-12-02 17:40:00,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:40:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:40:00,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:40:00,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:40:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:40:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:40:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:40:00,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:40:00,793 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:40:00,796 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:40:01,427 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:40:01,627 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:40:01,627 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:40:01,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:40:01 BoogieIcfgContainer [2023-12-02 17:40:01,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:40:01,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:40:01,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:40:01,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:40:01,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:39:59" (1/3) ... [2023-12-02 17:40:01,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75232f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:40:01, skipping insertion in model container [2023-12-02 17:40:01,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:40:00" (2/3) ... [2023-12-02 17:40:01,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75232f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:40:01, skipping insertion in model container [2023-12-02 17:40:01,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:40:01" (3/3) ... [2023-12-02 17:40:01,637 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-12-02 17:40:01,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:40:01,653 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:40:01,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:40:01,705 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;@4297e255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:40:01,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:40:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 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 17:40:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 17:40:01,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:01,720 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] [2023-12-02 17:40:01,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:01,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1229197706, now seen corresponding path program 1 times [2023-12-02 17:40:01,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:01,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585135078] [2023-12-02 17:40:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:01,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:02,332 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 17:40:02,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:02,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585135078] [2023-12-02 17:40:02,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585135078] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:02,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:02,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:40:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900338121] [2023-12-02 17:40:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:02,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:40:02,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:40:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:40:02,374 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 17:40:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:02,722 INFO L93 Difference]: Finished difference Result 577 states and 924 transitions. [2023-12-02 17:40:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:40:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2023-12-02 17:40:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:02,739 INFO L225 Difference]: With dead ends: 577 [2023-12-02 17:40:02,739 INFO L226 Difference]: Without dead ends: 480 [2023-12-02 17:40:02,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:40:02,746 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 842 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:02,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1146 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:40:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-02 17:40:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2023-12-02 17:40:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.40552016985138) internal successors, (662), 471 states have internal predecessors, (662), 0 states have call successors, (0), 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 17:40:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 662 transitions. [2023-12-02 17:40:02,814 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 662 transitions. Word has length 68 [2023-12-02 17:40:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:02,815 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 662 transitions. [2023-12-02 17:40:02,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 17:40:02,815 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 662 transitions. [2023-12-02 17:40:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:40:02,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:02,819 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] [2023-12-02 17:40:02,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:40:02,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:02,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -569700535, now seen corresponding path program 1 times [2023-12-02 17:40:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868179602] [2023-12-02 17:40:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:02,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:02,996 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 17:40:02,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:02,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868179602] [2023-12-02 17:40:02,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868179602] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:02,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:02,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:40:02,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340672292] [2023-12-02 17:40:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:40:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:40:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:40:03,000 INFO L87 Difference]: Start difference. First operand 472 states and 662 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:03,283 INFO L93 Difference]: Finished difference Result 1132 states and 1626 transitions. [2023-12-02 17:40:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:40:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2023-12-02 17:40:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:03,288 INFO L225 Difference]: With dead ends: 1132 [2023-12-02 17:40:03,288 INFO L226 Difference]: Without dead ends: 702 [2023-12-02 17:40:03,290 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 17:40:03,292 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 597 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:03,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 224 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:40:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-12-02 17:40:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2023-12-02 17:40:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4291845493562232) internal successors, (999), 699 states have internal predecessors, (999), 0 states have call successors, (0), 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 17:40:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 999 transitions. [2023-12-02 17:40:03,316 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 999 transitions. Word has length 69 [2023-12-02 17:40:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:03,317 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 999 transitions. [2023-12-02 17:40:03,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 999 transitions. [2023-12-02 17:40:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:40:03,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:03,320 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] [2023-12-02 17:40:03,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:40:03,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:03,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 51510616, now seen corresponding path program 1 times [2023-12-02 17:40:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:03,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630755058] [2023-12-02 17:40:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:03,481 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 17:40:03,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:03,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630755058] [2023-12-02 17:40:03,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630755058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:03,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:40:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286621006] [2023-12-02 17:40:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:03,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:40:03,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:40:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:40:03,484 INFO L87 Difference]: Start difference. First operand 700 states and 999 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:03,749 INFO L93 Difference]: Finished difference Result 1847 states and 2690 transitions. [2023-12-02 17:40:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:40:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2023-12-02 17:40:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:03,757 INFO L225 Difference]: With dead ends: 1847 [2023-12-02 17:40:03,757 INFO L226 Difference]: Without dead ends: 1205 [2023-12-02 17:40:03,758 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 17:40:03,760 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 580 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:03,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 232 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:40:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2023-12-02 17:40:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2023-12-02 17:40:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4467554076539102) internal successors, (1739), 1202 states have internal predecessors, (1739), 0 states have call successors, (0), 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 17:40:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1739 transitions. [2023-12-02 17:40:03,792 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1739 transitions. Word has length 69 [2023-12-02 17:40:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:03,793 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1739 transitions. [2023-12-02 17:40:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1739 transitions. [2023-12-02 17:40:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:40:03,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:03,795 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] [2023-12-02 17:40:03,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:40:03,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:03,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1571930713, now seen corresponding path program 1 times [2023-12-02 17:40:03,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:03,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360796098] [2023-12-02 17:40:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:03,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:03,982 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 17:40:03,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360796098] [2023-12-02 17:40:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360796098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:03,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:03,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:40:03,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328551676] [2023-12-02 17:40:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:40:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:40:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:40:03,985 INFO L87 Difference]: Start difference. First operand 1203 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:04,224 INFO L93 Difference]: Finished difference Result 3333 states and 4883 transitions. [2023-12-02 17:40:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:40:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2023-12-02 17:40:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:04,237 INFO L225 Difference]: With dead ends: 3333 [2023-12-02 17:40:04,237 INFO L226 Difference]: Without dead ends: 2211 [2023-12-02 17:40:04,239 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 17:40:04,240 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 563 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:04,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 240 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:40:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2023-12-02 17:40:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2209. [2023-12-02 17:40:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.453804347826087) internal successors, (3210), 2208 states have internal predecessors, (3210), 0 states have call successors, (0), 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 17:40:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3210 transitions. [2023-12-02 17:40:04,295 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3210 transitions. Word has length 69 [2023-12-02 17:40:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:04,296 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 3210 transitions. [2023-12-02 17:40:04,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3210 transitions. [2023-12-02 17:40:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:40:04,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:04,297 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] [2023-12-02 17:40:04,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:40:04,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:04,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:04,298 INFO L85 PathProgramCache]: Analyzing trace with hash -836087754, now seen corresponding path program 1 times [2023-12-02 17:40:04,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:04,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558933233] [2023-12-02 17:40:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:04,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:04,434 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 17:40:04,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:04,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558933233] [2023-12-02 17:40:04,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558933233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:04,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:04,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:40:04,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938234755] [2023-12-02 17:40:04,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:04,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:40:04,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:04,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:40:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:40:04,436 INFO L87 Difference]: Start difference. First operand 2209 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:04,710 INFO L93 Difference]: Finished difference Result 6321 states and 9261 transitions. [2023-12-02 17:40:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:40:04,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2023-12-02 17:40:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:04,734 INFO L225 Difference]: With dead ends: 6321 [2023-12-02 17:40:04,734 INFO L226 Difference]: Without dead ends: 4223 [2023-12-02 17:40:04,738 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 17:40:04,739 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 546 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:04,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 248 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:40:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2023-12-02 17:40:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4221. [2023-12-02 17:40:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 1.454265402843602) internal successors, (6137), 4220 states have internal predecessors, (6137), 0 states have call successors, (0), 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 17:40:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 6137 transitions. [2023-12-02 17:40:04,852 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 6137 transitions. Word has length 69 [2023-12-02 17:40:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 4221 states and 6137 transitions. [2023-12-02 17:40:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 6137 transitions. [2023-12-02 17:40:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:40:04,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:04,854 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] [2023-12-02 17:40:04,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:40:04,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:04,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1929333499, now seen corresponding path program 1 times [2023-12-02 17:40:04,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:04,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544009781] [2023-12-02 17:40:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:04,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:04,983 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 17:40:04,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:04,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544009781] [2023-12-02 17:40:04,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544009781] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:04,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:04,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:40:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131684280] [2023-12-02 17:40:04,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:04,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:40:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:40:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:40:04,986 INFO L87 Difference]: Start difference. First operand 4221 states and 6137 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:05,248 INFO L93 Difference]: Finished difference Result 12323 states and 18005 transitions. [2023-12-02 17:40:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:40:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2023-12-02 17:40:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:05,292 INFO L225 Difference]: With dead ends: 12323 [2023-12-02 17:40:05,292 INFO L226 Difference]: Without dead ends: 8247 [2023-12-02 17:40:05,298 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 17:40:05,299 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 564 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:05,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 249 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:40:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2023-12-02 17:40:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8245. [2023-12-02 17:40:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8245 states, 8244 states have (on average 1.4517224648229015) internal successors, (11968), 8244 states have internal predecessors, (11968), 0 states have call successors, (0), 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 17:40:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11968 transitions. [2023-12-02 17:40:05,469 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11968 transitions. Word has length 69 [2023-12-02 17:40:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:05,469 INFO L495 AbstractCegarLoop]: Abstraction has 8245 states and 11968 transitions. [2023-12-02 17:40:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 17:40:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11968 transitions. [2023-12-02 17:40:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:40:05,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:05,471 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] [2023-12-02 17:40:05,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:40:05,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:05,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash 554365610, now seen corresponding path program 1 times [2023-12-02 17:40:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563820696] [2023-12-02 17:40:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:07,090 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 17:40:07,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563820696] [2023-12-02 17:40:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563820696] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:07,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:40:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772909056] [2023-12-02 17:40:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:07,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:40:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:40:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:40:07,092 INFO L87 Difference]: Start difference. First operand 8245 states and 11968 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:08,406 INFO L93 Difference]: Finished difference Result 21186 states and 30729 transitions. [2023-12-02 17:40:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:40:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2023-12-02 17:40:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:08,483 INFO L225 Difference]: With dead ends: 21186 [2023-12-02 17:40:08,483 INFO L226 Difference]: Without dead ends: 21184 [2023-12-02 17:40:08,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:40:08,491 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1263 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:08,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1182 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:40:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2023-12-02 17:40:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 16308. [2023-12-02 17:40:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16308 states, 16307 states have (on average 1.4463727233703318) internal successors, (23586), 16307 states have internal predecessors, (23586), 0 states have call successors, (0), 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 17:40:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16308 states to 16308 states and 23586 transitions. [2023-12-02 17:40:08,897 INFO L78 Accepts]: Start accepts. Automaton has 16308 states and 23586 transitions. Word has length 70 [2023-12-02 17:40:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:08,898 INFO L495 AbstractCegarLoop]: Abstraction has 16308 states and 23586 transitions. [2023-12-02 17:40:08,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 16308 states and 23586 transitions. [2023-12-02 17:40:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:40:08,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:08,899 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] [2023-12-02 17:40:08,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:40:08,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:08,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 233750154, now seen corresponding path program 1 times [2023-12-02 17:40:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348023642] [2023-12-02 17:40:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:08,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:40:10,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348023642] [2023-12-02 17:40:10,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348023642] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:10,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:10,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:40:10,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946424622] [2023-12-02 17:40:10,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:10,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:40:10,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:10,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:40:10,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:40:10,322 INFO L87 Difference]: Start difference. First operand 16308 states and 23586 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:11,526 INFO L93 Difference]: Finished difference Result 26669 states and 38562 transitions. [2023-12-02 17:40:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:40:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2023-12-02 17:40:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:11,613 INFO L225 Difference]: With dead ends: 26669 [2023-12-02 17:40:11,613 INFO L226 Difference]: Without dead ends: 26667 [2023-12-02 17:40:11,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:40:11,619 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1227 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:11,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 2670 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:40:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26667 states. [2023-12-02 17:40:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26667 to 16337. [2023-12-02 17:40:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16337 states, 16336 states have (on average 1.4460700293829578) internal successors, (23623), 16336 states have internal predecessors, (23623), 0 states have call successors, (0), 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 17:40:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16337 states to 16337 states and 23623 transitions. [2023-12-02 17:40:11,985 INFO L78 Accepts]: Start accepts. Automaton has 16337 states and 23623 transitions. Word has length 70 [2023-12-02 17:40:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:11,986 INFO L495 AbstractCegarLoop]: Abstraction has 16337 states and 23623 transitions. [2023-12-02 17:40:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 16337 states and 23623 transitions. [2023-12-02 17:40:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:40:11,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:11,987 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] [2023-12-02 17:40:11,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:40:11,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:11,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2047988330, now seen corresponding path program 1 times [2023-12-02 17:40:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:11,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897573578] [2023-12-02 17:40:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:13,285 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 17:40:13,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:13,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897573578] [2023-12-02 17:40:13,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897573578] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:13,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:13,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:40:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077078912] [2023-12-02 17:40:13,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:40:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:40:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:40:13,288 INFO L87 Difference]: Start difference. First operand 16337 states and 23623 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:14,488 INFO L93 Difference]: Finished difference Result 23982 states and 34637 transitions. [2023-12-02 17:40:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:40:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2023-12-02 17:40:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:14,522 INFO L225 Difference]: With dead ends: 23982 [2023-12-02 17:40:14,522 INFO L226 Difference]: Without dead ends: 23980 [2023-12-02 17:40:14,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:40:14,531 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1117 mSDsluCounter, 3062 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:14,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 3417 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:40:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23980 states. [2023-12-02 17:40:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23980 to 16363. [2023-12-02 17:40:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16363 states, 16362 states have (on average 1.4457890233467792) internal successors, (23656), 16362 states have internal predecessors, (23656), 0 states have call successors, (0), 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 17:40:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16363 states to 16363 states and 23656 transitions. [2023-12-02 17:40:14,890 INFO L78 Accepts]: Start accepts. Automaton has 16363 states and 23656 transitions. Word has length 70 [2023-12-02 17:40:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:14,891 INFO L495 AbstractCegarLoop]: Abstraction has 16363 states and 23656 transitions. [2023-12-02 17:40:14,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 16363 states and 23656 transitions. [2023-12-02 17:40:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:40:14,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:14,892 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] [2023-12-02 17:40:14,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:40:14,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:14,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1162096202, now seen corresponding path program 1 times [2023-12-02 17:40:14,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528308295] [2023-12-02 17:40:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:16,145 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 17:40:16,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528308295] [2023-12-02 17:40:16,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528308295] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:16,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:16,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:40:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581821580] [2023-12-02 17:40:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:16,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:40:16,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:40:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:40:16,148 INFO L87 Difference]: Start difference. First operand 16363 states and 23656 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:17,322 INFO L93 Difference]: Finished difference Result 21758 states and 31382 transitions. [2023-12-02 17:40:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:40:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2023-12-02 17:40:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:17,373 INFO L225 Difference]: With dead ends: 21758 [2023-12-02 17:40:17,373 INFO L226 Difference]: Without dead ends: 19708 [2023-12-02 17:40:17,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:40:17,377 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 879 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:17,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 3459 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:40:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19708 states. [2023-12-02 17:40:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19708 to 18239. [2023-12-02 17:40:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18239 states, 18238 states have (on average 1.4435793398398946) internal successors, (26328), 18238 states have internal predecessors, (26328), 0 states have call successors, (0), 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 17:40:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18239 states to 18239 states and 26328 transitions. [2023-12-02 17:40:17,646 INFO L78 Accepts]: Start accepts. Automaton has 18239 states and 26328 transitions. Word has length 70 [2023-12-02 17:40:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:17,647 INFO L495 AbstractCegarLoop]: Abstraction has 18239 states and 26328 transitions. [2023-12-02 17:40:17,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18239 states and 26328 transitions. [2023-12-02 17:40:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:40:17,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:17,649 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] [2023-12-02 17:40:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:40:17,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:17,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 223728170, now seen corresponding path program 1 times [2023-12-02 17:40:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157636945] [2023-12-02 17:40:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:18,917 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 17:40:18,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157636945] [2023-12-02 17:40:18,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157636945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:18,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:18,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:40:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155066214] [2023-12-02 17:40:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:18,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:40:18,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:40:18,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:40:18,920 INFO L87 Difference]: Start difference. First operand 18239 states and 26328 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:20,100 INFO L93 Difference]: Finished difference Result 21559 states and 31025 transitions. [2023-12-02 17:40:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:40:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2023-12-02 17:40:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:20,129 INFO L225 Difference]: With dead ends: 21559 [2023-12-02 17:40:20,129 INFO L226 Difference]: Without dead ends: 21557 [2023-12-02 17:40:20,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:40:20,137 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 999 mSDsluCounter, 2803 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:20,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 3136 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:40:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21557 states. [2023-12-02 17:40:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21557 to 18257. [2023-12-02 17:40:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18257 states, 18256 states have (on average 1.4432515337423313) internal successors, (26348), 18256 states have internal predecessors, (26348), 0 states have call successors, (0), 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 17:40:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18257 states to 18257 states and 26348 transitions. [2023-12-02 17:40:20,393 INFO L78 Accepts]: Start accepts. Automaton has 18257 states and 26348 transitions. Word has length 70 [2023-12-02 17:40:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:20,393 INFO L495 AbstractCegarLoop]: Abstraction has 18257 states and 26348 transitions. [2023-12-02 17:40:20,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 17:40:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18257 states and 26348 transitions. [2023-12-02 17:40:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:20,395 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:20,395 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] [2023-12-02 17:40:20,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:40:20,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:20,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash 546145726, now seen corresponding path program 1 times [2023-12-02 17:40:20,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:20,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589204346] [2023-12-02 17:40:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:21,780 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 17:40:21,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589204346] [2023-12-02 17:40:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589204346] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:21,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:21,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:40:21,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460831916] [2023-12-02 17:40:21,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:21,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:40:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:40:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:40:21,783 INFO L87 Difference]: Start difference. First operand 18257 states and 26348 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:23,649 INFO L93 Difference]: Finished difference Result 35108 states and 50652 transitions. [2023-12-02 17:40:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:40:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:23,686 INFO L225 Difference]: With dead ends: 35108 [2023-12-02 17:40:23,687 INFO L226 Difference]: Without dead ends: 35106 [2023-12-02 17:40:23,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:40:23,695 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 846 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:23,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 2567 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:40:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35106 states. [2023-12-02 17:40:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35106 to 18246. [2023-12-02 17:40:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18246 states, 18245 states have (on average 1.4432995341189367) internal successors, (26333), 18245 states have internal predecessors, (26333), 0 states have call successors, (0), 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 17:40:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18246 states to 18246 states and 26333 transitions. [2023-12-02 17:40:23,999 INFO L78 Accepts]: Start accepts. Automaton has 18246 states and 26333 transitions. Word has length 72 [2023-12-02 17:40:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:23,999 INFO L495 AbstractCegarLoop]: Abstraction has 18246 states and 26333 transitions. [2023-12-02 17:40:23,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 18246 states and 26333 transitions. [2023-12-02 17:40:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:24,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:24,001 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] [2023-12-02 17:40:24,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:40:24,001 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:24,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:24,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1934583394, now seen corresponding path program 1 times [2023-12-02 17:40:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:24,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508396640] [2023-12-02 17:40:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:24,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:40:25,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508396640] [2023-12-02 17:40:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508396640] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:25,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:25,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-12-02 17:40:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271427856] [2023-12-02 17:40:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 17:40:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 17:40:25,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:40:25,438 INFO L87 Difference]: Start difference. First operand 18246 states and 26333 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:27,656 INFO L93 Difference]: Finished difference Result 30714 states and 44259 transitions. [2023-12-02 17:40:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:40:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:27,690 INFO L225 Difference]: With dead ends: 30714 [2023-12-02 17:40:27,690 INFO L226 Difference]: Without dead ends: 30712 [2023-12-02 17:40:27,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:40:27,698 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1529 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:27,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 2117 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 17:40:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30712 states. [2023-12-02 17:40:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30712 to 18252. [2023-12-02 17:40:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18252 states, 18251 states have (on average 1.443263382828338) internal successors, (26341), 18251 states have internal predecessors, (26341), 0 states have call successors, (0), 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 17:40:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18252 states to 18252 states and 26341 transitions. [2023-12-02 17:40:27,972 INFO L78 Accepts]: Start accepts. Automaton has 18252 states and 26341 transitions. Word has length 72 [2023-12-02 17:40:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:27,972 INFO L495 AbstractCegarLoop]: Abstraction has 18252 states and 26341 transitions. [2023-12-02 17:40:27,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 18252 states and 26341 transitions. [2023-12-02 17:40:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:27,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:27,974 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] [2023-12-02 17:40:27,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 17:40:27,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:27,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1474491774, now seen corresponding path program 1 times [2023-12-02 17:40:27,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:27,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485417146] [2023-12-02 17:40:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:27,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:28,856 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 17:40:28,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:28,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485417146] [2023-12-02 17:40:28,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485417146] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:28,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:28,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:40:28,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70079053] [2023-12-02 17:40:28,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:28,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:40:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:28,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:40:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:40:28,858 INFO L87 Difference]: Start difference. First operand 18252 states and 26341 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:30,048 INFO L93 Difference]: Finished difference Result 40334 states and 58227 transitions. [2023-12-02 17:40:30,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:40:30,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:30,080 INFO L225 Difference]: With dead ends: 40334 [2023-12-02 17:40:30,081 INFO L226 Difference]: Without dead ends: 36236 [2023-12-02 17:40:30,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:40:30,091 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 1162 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:30,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 1933 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:40:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36236 states. [2023-12-02 17:40:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36236 to 23363. [2023-12-02 17:40:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23363 states, 23362 states have (on average 1.4399880147247668) internal successors, (33641), 23362 states have internal predecessors, (33641), 0 states have call successors, (0), 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 17:40:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23363 states to 23363 states and 33641 transitions. [2023-12-02 17:40:30,357 INFO L78 Accepts]: Start accepts. Automaton has 23363 states and 33641 transitions. Word has length 72 [2023-12-02 17:40:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:30,358 INFO L495 AbstractCegarLoop]: Abstraction has 23363 states and 33641 transitions. [2023-12-02 17:40:30,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 23363 states and 33641 transitions. [2023-12-02 17:40:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:30,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:30,359 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] [2023-12-02 17:40:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 17:40:30,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:30,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash 536123742, now seen corresponding path program 1 times [2023-12-02 17:40:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:30,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398890695] [2023-12-02 17:40:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:31,443 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 17:40:31,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:31,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398890695] [2023-12-02 17:40:31,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398890695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:31,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:31,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-12-02 17:40:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288812662] [2023-12-02 17:40:31,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:31,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:40:31,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:40:31,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:40:31,445 INFO L87 Difference]: Start difference. First operand 23363 states and 33641 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:32,797 INFO L93 Difference]: Finished difference Result 49182 states and 70772 transitions. [2023-12-02 17:40:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:40:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:32,847 INFO L225 Difference]: With dead ends: 49182 [2023-12-02 17:40:32,847 INFO L226 Difference]: Without dead ends: 49180 [2023-12-02 17:40:32,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:40:32,859 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1138 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:32,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 2509 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:40:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49180 states. [2023-12-02 17:40:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49180 to 23370. [2023-12-02 17:40:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23370 states, 23369 states have (on average 1.4399418032436133) internal successors, (33650), 23369 states have internal predecessors, (33650), 0 states have call successors, (0), 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 17:40:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23370 states to 23370 states and 33650 transitions. [2023-12-02 17:40:33,174 INFO L78 Accepts]: Start accepts. Automaton has 23370 states and 33650 transitions. Word has length 72 [2023-12-02 17:40:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 23370 states and 33650 transitions. [2023-12-02 17:40:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23370 states and 33650 transitions. [2023-12-02 17:40:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:33,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:33,176 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] [2023-12-02 17:40:33,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:40:33,176 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:33,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash -808391298, now seen corresponding path program 1 times [2023-12-02 17:40:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:33,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772540769] [2023-12-02 17:40:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:34,295 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 17:40:34,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772540769] [2023-12-02 17:40:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772540769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:34,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:34,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:40:34,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890936060] [2023-12-02 17:40:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:34,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:40:34,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:40:34,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:40:34,297 INFO L87 Difference]: Start difference. First operand 23370 states and 33650 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:35,696 INFO L93 Difference]: Finished difference Result 35897 states and 51643 transitions. [2023-12-02 17:40:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 17:40:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:35,731 INFO L225 Difference]: With dead ends: 35897 [2023-12-02 17:40:35,731 INFO L226 Difference]: Without dead ends: 35895 [2023-12-02 17:40:35,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:40:35,740 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 964 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:35,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 2382 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:40:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35895 states. [2023-12-02 17:40:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35895 to 23379. [2023-12-02 17:40:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23379 states, 23378 states have (on average 1.439815210882026) internal successors, (33660), 23378 states have internal predecessors, (33660), 0 states have call successors, (0), 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 17:40:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23379 states to 23379 states and 33660 transitions. [2023-12-02 17:40:36,011 INFO L78 Accepts]: Start accepts. Automaton has 23379 states and 33660 transitions. Word has length 72 [2023-12-02 17:40:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:36,012 INFO L495 AbstractCegarLoop]: Abstraction has 23379 states and 33660 transitions. [2023-12-02 17:40:36,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 23379 states and 33660 transitions. [2023-12-02 17:40:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:36,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:36,013 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] [2023-12-02 17:40:36,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 17:40:36,013 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:36,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1694283426, now seen corresponding path program 1 times [2023-12-02 17:40:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:36,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308040388] [2023-12-02 17:40:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:36,837 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 17:40:36,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308040388] [2023-12-02 17:40:36,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308040388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:36,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:36,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:40:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015943002] [2023-12-02 17:40:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:36,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:40:36,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:40:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:40:36,839 INFO L87 Difference]: Start difference. First operand 23379 states and 33660 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:37,887 INFO L93 Difference]: Finished difference Result 43156 states and 62109 transitions. [2023-12-02 17:40:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:40:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:37,925 INFO L225 Difference]: With dead ends: 43156 [2023-12-02 17:40:37,925 INFO L226 Difference]: Without dead ends: 39058 [2023-12-02 17:40:37,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:40:37,937 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1067 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:37,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 2256 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:40:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39058 states. [2023-12-02 17:40:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39058 to 23400. [2023-12-02 17:40:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 1.43963417240053) internal successors, (33686), 23399 states have internal predecessors, (33686), 0 states have call successors, (0), 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 17:40:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 33686 transitions. [2023-12-02 17:40:38,213 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 33686 transitions. Word has length 72 [2023-12-02 17:40:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:38,213 INFO L495 AbstractCegarLoop]: Abstraction has 23400 states and 33686 transitions. [2023-12-02 17:40:38,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 33686 transitions. [2023-12-02 17:40:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:38,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:38,215 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] [2023-12-02 17:40:38,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 17:40:38,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1662315838, now seen corresponding path program 1 times [2023-12-02 17:40:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:38,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155393755] [2023-12-02 17:40:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:39,097 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 17:40:39,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:39,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155393755] [2023-12-02 17:40:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155393755] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:39,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:39,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:40:39,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445537750] [2023-12-02 17:40:39,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:39,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:40:39,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:40:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:40:39,099 INFO L87 Difference]: Start difference. First operand 23400 states and 33686 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:40,020 INFO L93 Difference]: Finished difference Result 40465 states and 58166 transitions. [2023-12-02 17:40:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:40:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:40,058 INFO L225 Difference]: With dead ends: 40465 [2023-12-02 17:40:40,058 INFO L226 Difference]: Without dead ends: 40463 [2023-12-02 17:40:40,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:40:40,068 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1231 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:40,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 2684 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:40:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40463 states. [2023-12-02 17:40:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40463 to 23407. [2023-12-02 17:40:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23407 states, 23406 states have (on average 1.4395881397932153) internal successors, (33695), 23406 states have internal predecessors, (33695), 0 states have call successors, (0), 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 17:40:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23407 states to 23407 states and 33695 transitions. [2023-12-02 17:40:40,352 INFO L78 Accepts]: Start accepts. Automaton has 23407 states and 33695 transitions. Word has length 72 [2023-12-02 17:40:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 23407 states and 33695 transitions. [2023-12-02 17:40:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 23407 states and 33695 transitions. [2023-12-02 17:40:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:40,354 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:40,354 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] [2023-12-02 17:40:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 17:40:40,354 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:40,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1968118466, now seen corresponding path program 1 times [2023-12-02 17:40:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200844529] [2023-12-02 17:40:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:41,341 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 17:40:41,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:41,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200844529] [2023-12-02 17:40:41,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200844529] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:41,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:41,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:40:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338291029] [2023-12-02 17:40:41,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:41,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:40:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:40:41,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:40:41,343 INFO L87 Difference]: Start difference. First operand 23407 states and 33695 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:42,167 INFO L93 Difference]: Finished difference Result 30727 states and 44152 transitions. [2023-12-02 17:40:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:40:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:42,194 INFO L225 Difference]: With dead ends: 30727 [2023-12-02 17:40:42,194 INFO L226 Difference]: Without dead ends: 28677 [2023-12-02 17:40:42,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:40:42,202 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1057 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:42,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 1742 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:40:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28677 states. [2023-12-02 17:40:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28677 to 23420. [2023-12-02 17:40:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23420 states, 23419 states have (on average 1.4394722234083437) internal successors, (33711), 23419 states have internal predecessors, (33711), 0 states have call successors, (0), 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 17:40:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23420 states to 23420 states and 33711 transitions. [2023-12-02 17:40:42,434 INFO L78 Accepts]: Start accepts. Automaton has 23420 states and 33711 transitions. Word has length 72 [2023-12-02 17:40:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:42,434 INFO L495 AbstractCegarLoop]: Abstraction has 23420 states and 33711 transitions. [2023-12-02 17:40:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 23420 states and 33711 transitions. [2023-12-02 17:40:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:42,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:42,435 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] [2023-12-02 17:40:42,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 17:40:42,436 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:42,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1388480798, now seen corresponding path program 1 times [2023-12-02 17:40:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688615837] [2023-12-02 17:40:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:43,369 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 17:40:43,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688615837] [2023-12-02 17:40:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688615837] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:43,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:40:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344833068] [2023-12-02 17:40:43,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:43,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:40:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:40:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:40:43,372 INFO L87 Difference]: Start difference. First operand 23420 states and 33711 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:44,603 INFO L93 Difference]: Finished difference Result 35889 states and 51634 transitions. [2023-12-02 17:40:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:40:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:44,637 INFO L225 Difference]: With dead ends: 35889 [2023-12-02 17:40:44,637 INFO L226 Difference]: Without dead ends: 35887 [2023-12-02 17:40:44,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:40:44,645 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1094 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:44,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 2497 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:40:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35887 states. [2023-12-02 17:40:44,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35887 to 23428. [2023-12-02 17:40:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23428 states, 23427 states have (on average 1.439450207026081) internal successors, (33722), 23427 states have internal predecessors, (33722), 0 states have call successors, (0), 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 17:40:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23428 states to 23428 states and 33722 transitions. [2023-12-02 17:40:44,912 INFO L78 Accepts]: Start accepts. Automaton has 23428 states and 33722 transitions. Word has length 72 [2023-12-02 17:40:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:44,912 INFO L495 AbstractCegarLoop]: Abstraction has 23428 states and 33722 transitions. [2023-12-02 17:40:44,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 23428 states and 33722 transitions. [2023-12-02 17:40:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:40:44,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:44,914 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] [2023-12-02 17:40:44,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 17:40:44,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:44,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash 449670398, now seen corresponding path program 1 times [2023-12-02 17:40:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:44,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633414723] [2023-12-02 17:40:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:45,848 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 17:40:45,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633414723] [2023-12-02 17:40:45,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633414723] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:45,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:45,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:40:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194612839] [2023-12-02 17:40:45,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:45,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:40:45,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:45,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:40:45,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:40:45,850 INFO L87 Difference]: Start difference. First operand 23428 states and 33722 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:46,669 INFO L93 Difference]: Finished difference Result 28728 states and 41240 transitions. [2023-12-02 17:40:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:40:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:40:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:46,697 INFO L225 Difference]: With dead ends: 28728 [2023-12-02 17:40:46,697 INFO L226 Difference]: Without dead ends: 28726 [2023-12-02 17:40:46,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:40:46,704 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 971 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:46,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 1637 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:40:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28726 states. [2023-12-02 17:40:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28726 to 24464. [2023-12-02 17:40:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24464 states, 24463 states have (on average 1.4379675428197687) internal successors, (35177), 24463 states have internal predecessors, (35177), 0 states have call successors, (0), 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 17:40:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24464 states to 24464 states and 35177 transitions. [2023-12-02 17:40:46,936 INFO L78 Accepts]: Start accepts. Automaton has 24464 states and 35177 transitions. Word has length 72 [2023-12-02 17:40:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:46,936 INFO L495 AbstractCegarLoop]: Abstraction has 24464 states and 35177 transitions. [2023-12-02 17:40:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:40:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24464 states and 35177 transitions. [2023-12-02 17:40:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:40:46,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:46,938 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] [2023-12-02 17:40:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 17:40:46,938 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:46,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:46,939 INFO L85 PathProgramCache]: Analyzing trace with hash -559816065, now seen corresponding path program 1 times [2023-12-02 17:40:46,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:46,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184417148] [2023-12-02 17:40:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:46,975 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 17:40:46,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184417148] [2023-12-02 17:40:46,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184417148] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:46,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:46,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:40:46,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689127477] [2023-12-02 17:40:46,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:40:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:40:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:40:46,977 INFO L87 Difference]: Start difference. First operand 24464 states and 35177 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:40:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:47,120 INFO L93 Difference]: Finished difference Result 44400 states and 63989 transitions. [2023-12-02 17:40:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:40:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 17:40:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:47,143 INFO L225 Difference]: With dead ends: 44400 [2023-12-02 17:40:47,144 INFO L226 Difference]: Without dead ends: 23745 [2023-12-02 17:40:47,163 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 17:40:47,164 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 142 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:47,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 379 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:40:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23745 states. [2023-12-02 17:40:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23745 to 23743. [2023-12-02 17:40:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23743 states, 23742 states have (on average 1.436357509898071) internal successors, (34102), 23742 states have internal predecessors, (34102), 0 states have call successors, (0), 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 17:40:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23743 states to 23743 states and 34102 transitions. [2023-12-02 17:40:47,374 INFO L78 Accepts]: Start accepts. Automaton has 23743 states and 34102 transitions. Word has length 73 [2023-12-02 17:40:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:47,374 INFO L495 AbstractCegarLoop]: Abstraction has 23743 states and 34102 transitions. [2023-12-02 17:40:47,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:40:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 23743 states and 34102 transitions. [2023-12-02 17:40:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:40:47,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:47,375 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] [2023-12-02 17:40:47,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 17:40:47,375 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:47,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash -896475204, now seen corresponding path program 1 times [2023-12-02 17:40:47,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:47,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911546510] [2023-12-02 17:40:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:47,411 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 17:40:47,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911546510] [2023-12-02 17:40:47,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911546510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:47,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:47,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:40:47,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597366924] [2023-12-02 17:40:47,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:47,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:40:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:40:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:40:47,412 INFO L87 Difference]: Start difference. First operand 23743 states and 34102 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:40:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:47,530 INFO L93 Difference]: Finished difference Result 45638 states and 65758 transitions. [2023-12-02 17:40:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:40:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 17:40:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:47,553 INFO L225 Difference]: With dead ends: 45638 [2023-12-02 17:40:47,553 INFO L226 Difference]: Without dead ends: 23158 [2023-12-02 17:40:47,570 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 17:40:47,570 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 136 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:47,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 369 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:40:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23158 states. [2023-12-02 17:40:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23158 to 23043. [2023-12-02 17:40:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23043 states, 23042 states have (on average 1.434641090183144) internal successors, (33057), 23042 states have internal predecessors, (33057), 0 states have call successors, (0), 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 17:40:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23043 states to 23043 states and 33057 transitions. [2023-12-02 17:40:47,779 INFO L78 Accepts]: Start accepts. Automaton has 23043 states and 33057 transitions. Word has length 73 [2023-12-02 17:40:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:47,779 INFO L495 AbstractCegarLoop]: Abstraction has 23043 states and 33057 transitions. [2023-12-02 17:40:47,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:40:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 23043 states and 33057 transitions. [2023-12-02 17:40:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:40:47,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:47,781 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] [2023-12-02 17:40:47,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 17:40:47,781 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:47,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1601924944, now seen corresponding path program 1 times [2023-12-02 17:40:47,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:47,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215476975] [2023-12-02 17:40:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:47,814 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 17:40:47,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:47,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215476975] [2023-12-02 17:40:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215476975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:47,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:47,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:40:47,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881355642] [2023-12-02 17:40:47,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:47,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:40:47,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:40:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:40:47,815 INFO L87 Difference]: Start difference. First operand 23043 states and 33057 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:40:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:47,933 INFO L93 Difference]: Finished difference Result 40156 states and 57725 transitions. [2023-12-02 17:40:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:40:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 17:40:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:47,954 INFO L225 Difference]: With dead ends: 40156 [2023-12-02 17:40:47,954 INFO L226 Difference]: Without dead ends: 22257 [2023-12-02 17:40:47,963 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 17:40:47,964 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 145 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:47,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 359 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:40:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22257 states. [2023-12-02 17:40:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22257 to 22255. [2023-12-02 17:40:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22255 states, 22254 states have (on average 1.4324615799406848) internal successors, (31878), 22254 states have internal predecessors, (31878), 0 states have call successors, (0), 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 17:40:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22255 states to 22255 states and 31878 transitions. [2023-12-02 17:40:48,199 INFO L78 Accepts]: Start accepts. Automaton has 22255 states and 31878 transitions. Word has length 73 [2023-12-02 17:40:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:48,200 INFO L495 AbstractCegarLoop]: Abstraction has 22255 states and 31878 transitions. [2023-12-02 17:40:48,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:40:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 22255 states and 31878 transitions. [2023-12-02 17:40:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:40:48,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:48,201 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] [2023-12-02 17:40:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 17:40:48,201 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:48,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1243957326, now seen corresponding path program 1 times [2023-12-02 17:40:48,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:48,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638478636] [2023-12-02 17:40:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:50,838 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 17:40:50,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:50,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638478636] [2023-12-02 17:40:50,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638478636] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:50,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:50,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-12-02 17:40:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212426076] [2023-12-02 17:40:50,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:50,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:40:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:40:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:40:50,840 INFO L87 Difference]: Start difference. First operand 22255 states and 31878 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:40:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:55,443 INFO L93 Difference]: Finished difference Result 29389 states and 42110 transitions. [2023-12-02 17:40:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 17:40:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:40:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:55,468 INFO L225 Difference]: With dead ends: 29389 [2023-12-02 17:40:55,468 INFO L226 Difference]: Without dead ends: 29387 [2023-12-02 17:40:55,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=756, Invalid=2436, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 17:40:55,475 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1408 mSDsluCounter, 3489 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:55,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1408 Valid, 3853 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1997 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:40:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29387 states. [2023-12-02 17:40:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29387 to 22255. [2023-12-02 17:40:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22255 states, 22254 states have (on average 1.4324615799406848) internal successors, (31878), 22254 states have internal predecessors, (31878), 0 states have call successors, (0), 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 17:40:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22255 states to 22255 states and 31878 transitions. [2023-12-02 17:40:55,685 INFO L78 Accepts]: Start accepts. Automaton has 22255 states and 31878 transitions. Word has length 74 [2023-12-02 17:40:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:55,686 INFO L495 AbstractCegarLoop]: Abstraction has 22255 states and 31878 transitions. [2023-12-02 17:40:55,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:40:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 22255 states and 31878 transitions. [2023-12-02 17:40:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:40:55,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:55,687 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] [2023-12-02 17:40:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 17:40:55,687 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:55,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2129849454, now seen corresponding path program 1 times [2023-12-02 17:40:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:55,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964542388] [2023-12-02 17:40:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:57,050 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 17:40:57,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964542388] [2023-12-02 17:40:57,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964542388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:57,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:40:57,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:40:57,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103628885] [2023-12-02 17:40:57,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:57,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:40:57,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:40:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:40:57,052 INFO L87 Difference]: Start difference. First operand 22255 states and 31878 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:40:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:58,303 INFO L93 Difference]: Finished difference Result 43495 states and 62264 transitions. [2023-12-02 17:40:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:40:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:40:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:58,336 INFO L225 Difference]: With dead ends: 43495 [2023-12-02 17:40:58,337 INFO L226 Difference]: Without dead ends: 39653 [2023-12-02 17:40:58,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:40:58,345 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 813 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:58,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 1937 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:40:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39653 states. [2023-12-02 17:40:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39653 to 22262. [2023-12-02 17:40:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22262 states, 22261 states have (on average 1.4324154350658103) internal successors, (31887), 22261 states have internal predecessors, (31887), 0 states have call successors, (0), 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 17:40:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22262 states to 22262 states and 31887 transitions. [2023-12-02 17:40:58,586 INFO L78 Accepts]: Start accepts. Automaton has 22262 states and 31887 transitions. Word has length 74 [2023-12-02 17:40:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:58,587 INFO L495 AbstractCegarLoop]: Abstraction has 22262 states and 31887 transitions. [2023-12-02 17:40:58,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:40:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22262 states and 31887 transitions. [2023-12-02 17:40:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:40:58,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:58,588 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] [2023-12-02 17:40:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 17:40:58,588 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:58,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1226749810, now seen corresponding path program 1 times [2023-12-02 17:40:58,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:58,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047005599] [2023-12-02 17:40:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:01,911 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 17:41:01,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:01,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047005599] [2023-12-02 17:41:01,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047005599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:01,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:01,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2023-12-02 17:41:01,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623567499] [2023-12-02 17:41:01,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 17:41:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 17:41:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:41:01,913 INFO L87 Difference]: Start difference. First operand 22262 states and 31887 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:07,633 INFO L93 Difference]: Finished difference Result 37937 states and 54182 transitions. [2023-12-02 17:41:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 17:41:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:07,668 INFO L225 Difference]: With dead ends: 37937 [2023-12-02 17:41:07,668 INFO L226 Difference]: Without dead ends: 37935 [2023-12-02 17:41:07,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=812, Invalid=2728, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 17:41:07,676 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1396 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 3155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:07,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 2412 Invalid, 3155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3137 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 17:41:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37935 states. [2023-12-02 17:41:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37935 to 22265. [2023-12-02 17:41:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22265 states, 22264 states have (on average 1.4323571685231764) internal successors, (31890), 22264 states have internal predecessors, (31890), 0 states have call successors, (0), 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 17:41:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22265 states to 22265 states and 31890 transitions. [2023-12-02 17:41:07,930 INFO L78 Accepts]: Start accepts. Automaton has 22265 states and 31890 transitions. Word has length 74 [2023-12-02 17:41:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:07,930 INFO L495 AbstractCegarLoop]: Abstraction has 22265 states and 31890 transitions. [2023-12-02 17:41:07,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 22265 states and 31890 transitions. [2023-12-02 17:41:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:07,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:07,931 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] [2023-12-02 17:41:07,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 17:41:07,931 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:07,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1891282802, now seen corresponding path program 1 times [2023-12-02 17:41:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:07,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534482585] [2023-12-02 17:41:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:07,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:08,913 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 17:41:08,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:08,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534482585] [2023-12-02 17:41:08,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534482585] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:08,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:08,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:41:08,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706109017] [2023-12-02 17:41:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:08,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:41:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:41:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:41:08,915 INFO L87 Difference]: Start difference. First operand 22265 states and 31890 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:09,699 INFO L93 Difference]: Finished difference Result 29136 states and 41666 transitions. [2023-12-02 17:41:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:41:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:09,722 INFO L225 Difference]: With dead ends: 29136 [2023-12-02 17:41:09,722 INFO L226 Difference]: Without dead ends: 27214 [2023-12-02 17:41:09,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:41:09,728 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 776 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:09,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 1743 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:41:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27214 states. [2023-12-02 17:41:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27214 to 22278. [2023-12-02 17:41:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22278 states, 22277 states have (on average 1.4322395295596355) internal successors, (31906), 22277 states have internal predecessors, (31906), 0 states have call successors, (0), 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 17:41:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22278 states to 22278 states and 31906 transitions. [2023-12-02 17:41:09,925 INFO L78 Accepts]: Start accepts. Automaton has 22278 states and 31906 transitions. Word has length 74 [2023-12-02 17:41:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:09,925 INFO L495 AbstractCegarLoop]: Abstraction has 22278 states and 31906 transitions. [2023-12-02 17:41:09,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 22278 states and 31906 transitions. [2023-12-02 17:41:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:09,926 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:09,926 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] [2023-12-02 17:41:09,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 17:41:09,926 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:09,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash 952914770, now seen corresponding path program 1 times [2023-12-02 17:41:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:09,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573862417] [2023-12-02 17:41:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:09,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:11,607 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 17:41:11,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:11,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573862417] [2023-12-02 17:41:11,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573862417] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:11,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:11,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-02 17:41:11,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066867758] [2023-12-02 17:41:11,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:11,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:41:11,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:41:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:41:11,609 INFO L87 Difference]: Start difference. First operand 22278 states and 31906 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:14,539 INFO L93 Difference]: Finished difference Result 41673 states and 59562 transitions. [2023-12-02 17:41:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 17:41:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:14,576 INFO L225 Difference]: With dead ends: 41673 [2023-12-02 17:41:14,576 INFO L226 Difference]: Without dead ends: 41671 [2023-12-02 17:41:14,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=505, Invalid=1751, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:41:14,585 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1430 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:14,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 2302 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:41:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41671 states. [2023-12-02 17:41:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41671 to 22272. [2023-12-02 17:41:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22272 states, 22271 states have (on average 1.4323110771855776) internal successors, (31899), 22271 states have internal predecessors, (31899), 0 states have call successors, (0), 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 17:41:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22272 states to 22272 states and 31899 transitions. [2023-12-02 17:41:14,838 INFO L78 Accepts]: Start accepts. Automaton has 22272 states and 31899 transitions. Word has length 74 [2023-12-02 17:41:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:14,839 INFO L495 AbstractCegarLoop]: Abstraction has 22272 states and 31899 transitions. [2023-12-02 17:41:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22272 states and 31899 transitions. [2023-12-02 17:41:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:14,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:14,840 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] [2023-12-02 17:41:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 17:41:14,840 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:14,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 14104370, now seen corresponding path program 1 times [2023-12-02 17:41:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:14,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102145314] [2023-12-02 17:41:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:17,508 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 17:41:17,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:17,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102145314] [2023-12-02 17:41:17,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102145314] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:17,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:17,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-12-02 17:41:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970830403] [2023-12-02 17:41:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:17,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 17:41:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 17:41:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:41:17,510 INFO L87 Difference]: Start difference. First operand 22272 states and 31899 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:20,455 INFO L93 Difference]: Finished difference Result 27320 states and 39011 transitions. [2023-12-02 17:41:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 17:41:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:20,478 INFO L225 Difference]: With dead ends: 27320 [2023-12-02 17:41:20,478 INFO L226 Difference]: Without dead ends: 27318 [2023-12-02 17:41:20,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=674, Invalid=1978, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:41:20,484 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1214 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:20,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 2716 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:41:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27318 states. [2023-12-02 17:41:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27318 to 22272. [2023-12-02 17:41:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22272 states, 22271 states have (on average 1.4323110771855776) internal successors, (31899), 22271 states have internal predecessors, (31899), 0 states have call successors, (0), 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 17:41:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22272 states to 22272 states and 31899 transitions. [2023-12-02 17:41:20,682 INFO L78 Accepts]: Start accepts. Automaton has 22272 states and 31899 transitions. Word has length 74 [2023-12-02 17:41:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:20,682 INFO L495 AbstractCegarLoop]: Abstraction has 22272 states and 31899 transitions. [2023-12-02 17:41:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22272 states and 31899 transitions. [2023-12-02 17:41:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:20,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:20,683 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] [2023-12-02 17:41:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 17:41:20,684 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:20,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1830128466, now seen corresponding path program 1 times [2023-12-02 17:41:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:20,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251745922] [2023-12-02 17:41:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:20,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:23,234 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 17:41:23,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:23,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251745922] [2023-12-02 17:41:23,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251745922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:23,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:23,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-02 17:41:23,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597804576] [2023-12-02 17:41:23,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:23,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:41:23,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:23,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:41:23,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:41:23,236 INFO L87 Difference]: Start difference. First operand 22272 states and 31899 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:27,133 INFO L93 Difference]: Finished difference Result 29153 states and 41686 transitions. [2023-12-02 17:41:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 17:41:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:27,157 INFO L225 Difference]: With dead ends: 29153 [2023-12-02 17:41:27,157 INFO L226 Difference]: Without dead ends: 27231 [2023-12-02 17:41:27,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=541, Invalid=1909, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:41:27,164 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1314 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:27,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 2003 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:41:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27231 states. [2023-12-02 17:41:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27231 to 22278. [2023-12-02 17:41:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22278 states, 22277 states have (on average 1.4322395295596355) internal successors, (31906), 22277 states have internal predecessors, (31906), 0 states have call successors, (0), 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 17:41:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22278 states to 22278 states and 31906 transitions. [2023-12-02 17:41:27,404 INFO L78 Accepts]: Start accepts. Automaton has 22278 states and 31906 transitions. Word has length 74 [2023-12-02 17:41:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:27,404 INFO L495 AbstractCegarLoop]: Abstraction has 22278 states and 31906 transitions. [2023-12-02 17:41:27,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 22278 states and 31906 transitions. [2023-12-02 17:41:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:27,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:27,406 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] [2023-12-02 17:41:27,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 17:41:27,406 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash 891760434, now seen corresponding path program 1 times [2023-12-02 17:41:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:27,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697633631] [2023-12-02 17:41:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:28,393 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 17:41:28,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:28,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697633631] [2023-12-02 17:41:28,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697633631] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:28,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:28,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:41:28,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800181618] [2023-12-02 17:41:28,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:28,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:41:28,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:41:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:41:28,395 INFO L87 Difference]: Start difference. First operand 22278 states and 31906 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:29,940 INFO L93 Difference]: Finished difference Result 31348 states and 44812 transitions. [2023-12-02 17:41:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:41:29,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:29,967 INFO L225 Difference]: With dead ends: 31348 [2023-12-02 17:41:29,967 INFO L226 Difference]: Without dead ends: 31346 [2023-12-02 17:41:29,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:41:29,974 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 799 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:29,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 3030 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:41:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31346 states. [2023-12-02 17:41:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31346 to 22272. [2023-12-02 17:41:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22272 states, 22271 states have (on average 1.4323110771855776) internal successors, (31899), 22271 states have internal predecessors, (31899), 0 states have call successors, (0), 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 17:41:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22272 states to 22272 states and 31899 transitions. [2023-12-02 17:41:30,198 INFO L78 Accepts]: Start accepts. Automaton has 22272 states and 31899 transitions. Word has length 74 [2023-12-02 17:41:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:30,198 INFO L495 AbstractCegarLoop]: Abstraction has 22272 states and 31899 transitions. [2023-12-02 17:41:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 22272 states and 31899 transitions. [2023-12-02 17:41:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:30,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:30,226 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] [2023-12-02 17:41:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-12-02 17:41:30,227 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:30,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash -47049966, now seen corresponding path program 1 times [2023-12-02 17:41:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137223403] [2023-12-02 17:41:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:31,204 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 17:41:31,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:31,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137223403] [2023-12-02 17:41:31,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137223403] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:31,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:31,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:41:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622673262] [2023-12-02 17:41:31,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:41:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:41:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:41:31,206 INFO L87 Difference]: Start difference. First operand 22272 states and 31899 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:32,335 INFO L93 Difference]: Finished difference Result 28233 states and 40309 transitions. [2023-12-02 17:41:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:41:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:32,361 INFO L225 Difference]: With dead ends: 28233 [2023-12-02 17:41:32,361 INFO L226 Difference]: Without dead ends: 28231 [2023-12-02 17:41:32,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:41:32,367 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 818 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:32,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 2296 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:41:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28231 states. [2023-12-02 17:41:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28231 to 22279. [2023-12-02 17:41:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22279 states, 22278 states have (on average 1.4322650148128198) internal successors, (31908), 22278 states have internal predecessors, (31908), 0 states have call successors, (0), 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 17:41:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22279 states to 22279 states and 31908 transitions. [2023-12-02 17:41:32,575 INFO L78 Accepts]: Start accepts. Automaton has 22279 states and 31908 transitions. Word has length 74 [2023-12-02 17:41:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:32,576 INFO L495 AbstractCegarLoop]: Abstraction has 22279 states and 31908 transitions. [2023-12-02 17:41:32,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22279 states and 31908 transitions. [2023-12-02 17:41:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:41:32,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:32,577 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] [2023-12-02 17:41:32,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 17:41:32,577 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:32,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:32,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1209518350, now seen corresponding path program 1 times [2023-12-02 17:41:32,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:32,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360956657] [2023-12-02 17:41:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:32,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:34,610 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 17:41:34,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:34,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360956657] [2023-12-02 17:41:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360956657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-02 17:41:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875343563] [2023-12-02 17:41:34,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:41:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:41:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:41:34,612 INFO L87 Difference]: Start difference. First operand 22279 states and 31908 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:39,812 INFO L93 Difference]: Finished difference Result 25417 states and 36324 transitions. [2023-12-02 17:41:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:41:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:41:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:39,836 INFO L225 Difference]: With dead ends: 25417 [2023-12-02 17:41:39,836 INFO L226 Difference]: Without dead ends: 25415 [2023-12-02 17:41:39,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=603, Invalid=2049, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:41:39,842 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1124 mSDsluCounter, 2963 mSDsCounter, 0 mSdLazyCounter, 4570 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 3205 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:39,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 3205 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4570 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 17:41:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25415 states. [2023-12-02 17:41:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25415 to 22285. [2023-12-02 17:41:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22285 states, 22284 states have (on average 1.4321935020642613) internal successors, (31915), 22284 states have internal predecessors, (31915), 0 states have call successors, (0), 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 17:41:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22285 states to 22285 states and 31915 transitions. [2023-12-02 17:41:40,037 INFO L78 Accepts]: Start accepts. Automaton has 22285 states and 31915 transitions. Word has length 74 [2023-12-02 17:41:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:40,037 INFO L495 AbstractCegarLoop]: Abstraction has 22285 states and 31915 transitions. [2023-12-02 17:41:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 17:41:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22285 states and 31915 transitions. [2023-12-02 17:41:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:41:40,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:40,038 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] [2023-12-02 17:41:40,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 17:41:40,038 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:40,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1957307641, now seen corresponding path program 1 times [2023-12-02 17:41:40,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:40,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017027812] [2023-12-02 17:41:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:40,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:40,082 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 17:41:40,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:40,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017027812] [2023-12-02 17:41:40,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017027812] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:40,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:40,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:41:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984255173] [2023-12-02 17:41:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:40,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:41:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:41:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:41:40,084 INFO L87 Difference]: Start difference. First operand 22285 states and 31915 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:41:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:40,207 INFO L93 Difference]: Finished difference Result 43691 states and 62747 transitions. [2023-12-02 17:41:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:41:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2023-12-02 17:41:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:40,224 INFO L225 Difference]: With dead ends: 43691 [2023-12-02 17:41:40,225 INFO L226 Difference]: Without dead ends: 21565 [2023-12-02 17:41:40,235 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 17:41:40,235 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 136 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:40,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 359 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:41:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21565 states. [2023-12-02 17:41:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21565 to 21563. [2023-12-02 17:41:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21563 states, 21562 states have (on average 1.4306186810128931) internal successors, (30847), 21562 states have internal predecessors, (30847), 0 states have call successors, (0), 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 17:41:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21563 states to 21563 states and 30847 transitions. [2023-12-02 17:41:40,409 INFO L78 Accepts]: Start accepts. Automaton has 21563 states and 30847 transitions. Word has length 75 [2023-12-02 17:41:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:40,410 INFO L495 AbstractCegarLoop]: Abstraction has 21563 states and 30847 transitions. [2023-12-02 17:41:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:41:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 21563 states and 30847 transitions. [2023-12-02 17:41:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:41:40,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:40,410 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] [2023-12-02 17:41:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 17:41:40,411 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1320493654, now seen corresponding path program 1 times [2023-12-02 17:41:40,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:40,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385865627] [2023-12-02 17:41:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:40,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:40,453 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 17:41:40,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385865627] [2023-12-02 17:41:40,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385865627] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:41:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371647892] [2023-12-02 17:41:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:41:40,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:41:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:41:40,455 INFO L87 Difference]: Start difference. First operand 21563 states and 30847 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:41:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:40,565 INFO L93 Difference]: Finished difference Result 36785 states and 52758 transitions. [2023-12-02 17:41:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:41:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2023-12-02 17:41:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:40,580 INFO L225 Difference]: With dead ends: 36785 [2023-12-02 17:41:40,580 INFO L226 Difference]: Without dead ends: 18077 [2023-12-02 17:41:40,588 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 17:41:40,589 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 129 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:40,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 359 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:41:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18077 states. [2023-12-02 17:41:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18077 to 18075. [2023-12-02 17:41:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18075 states, 18074 states have (on average 1.427132898085648) internal successors, (25794), 18074 states have internal predecessors, (25794), 0 states have call successors, (0), 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 17:41:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18075 states to 18075 states and 25794 transitions. [2023-12-02 17:41:40,736 INFO L78 Accepts]: Start accepts. Automaton has 18075 states and 25794 transitions. Word has length 75 [2023-12-02 17:41:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:40,736 INFO L495 AbstractCegarLoop]: Abstraction has 18075 states and 25794 transitions. [2023-12-02 17:41:40,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:41:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18075 states and 25794 transitions. [2023-12-02 17:41:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:41:40,737 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:40,737 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] [2023-12-02 17:41:40,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 17:41:40,737 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:40,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -136996730, now seen corresponding path program 1 times [2023-12-02 17:41:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975281765] [2023-12-02 17:41:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:41:45,596 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 17:41:45,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:41:45,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975281765] [2023-12-02 17:41:45,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975281765] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:41:45,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:41:45,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-12-02 17:41:45,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583246893] [2023-12-02 17:41:45,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:41:45,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 17:41:45,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 17:41:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:41:45,599 INFO L87 Difference]: Start difference. First operand 18075 states and 25794 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:41:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:41:54,539 INFO L93 Difference]: Finished difference Result 24452 states and 34839 transitions. [2023-12-02 17:41:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:41:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:41:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:41:54,557 INFO L225 Difference]: With dead ends: 24452 [2023-12-02 17:41:54,557 INFO L226 Difference]: Without dead ends: 22658 [2023-12-02 17:41:54,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=743, Invalid=2679, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:41:54,563 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 977 mSDsluCounter, 2366 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 4058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:41:54,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 2567 Invalid, 4058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4047 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 17:41:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22658 states. [2023-12-02 17:41:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22658 to 18059. [2023-12-02 17:41:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18059 states, 18058 states have (on average 1.4274559751910512) internal successors, (25777), 18058 states have internal predecessors, (25777), 0 states have call successors, (0), 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 17:41:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18059 states to 18059 states and 25777 transitions. [2023-12-02 17:41:54,724 INFO L78 Accepts]: Start accepts. Automaton has 18059 states and 25777 transitions. Word has length 76 [2023-12-02 17:41:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:41:54,724 INFO L495 AbstractCegarLoop]: Abstraction has 18059 states and 25777 transitions. [2023-12-02 17:41:54,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:41:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18059 states and 25777 transitions. [2023-12-02 17:41:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:41:54,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:41:54,725 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] [2023-12-02 17:41:54,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-12-02 17:41:54,725 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:41:54,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:41:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1075364762, now seen corresponding path program 1 times [2023-12-02 17:41:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:41:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940006263] [2023-12-02 17:41:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:41:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:41:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:42:00,269 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 17:42:00,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:42:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940006263] [2023-12-02 17:42:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940006263] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:42:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:42:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2023-12-02 17:42:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859287808] [2023-12-02 17:42:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:42:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:42:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:42:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:42:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:42:00,271 INFO L87 Difference]: Start difference. First operand 18059 states and 25777 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:42:10,848 INFO L93 Difference]: Finished difference Result 20973 states and 29861 transitions. [2023-12-02 17:42:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 17:42:10,849 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:42:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:42:10,864 INFO L225 Difference]: With dead ends: 20973 [2023-12-02 17:42:10,864 INFO L226 Difference]: Without dead ends: 20971 [2023-12-02 17:42:10,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=920, Invalid=2986, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 17:42:10,870 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1331 mSDsluCounter, 3227 mSDsCounter, 0 mSdLazyCounter, 5340 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 3560 SdHoareTripleChecker+Invalid, 5362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:42:10,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 3560 Invalid, 5362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5340 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 17:42:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20971 states. [2023-12-02 17:42:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20971 to 18049. [2023-12-02 17:42:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18049 states, 18048 states have (on average 1.4275820035460993) internal successors, (25765), 18048 states have internal predecessors, (25765), 0 states have call successors, (0), 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 17:42:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18049 states to 18049 states and 25765 transitions. [2023-12-02 17:42:11,026 INFO L78 Accepts]: Start accepts. Automaton has 18049 states and 25765 transitions. Word has length 76 [2023-12-02 17:42:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:42:11,026 INFO L495 AbstractCegarLoop]: Abstraction has 18049 states and 25765 transitions. [2023-12-02 17:42:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18049 states and 25765 transitions. [2023-12-02 17:42:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:42:11,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:42:11,028 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] [2023-12-02 17:42:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-12-02 17:42:11,028 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:42:11,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:42:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2014175162, now seen corresponding path program 1 times [2023-12-02 17:42:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:42:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506084896] [2023-12-02 17:42:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:42:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:42:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:42:16,432 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 17:42:16,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:42:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506084896] [2023-12-02 17:42:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506084896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:42:16,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:42:16,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2023-12-02 17:42:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890575919] [2023-12-02 17:42:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:42:16,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 17:42:16,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:42:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 17:42:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:42:16,434 INFO L87 Difference]: Start difference. First operand 18049 states and 25765 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:42:27,801 INFO L93 Difference]: Finished difference Result 22729 states and 32338 transitions. [2023-12-02 17:42:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 17:42:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:42:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:42:27,818 INFO L225 Difference]: With dead ends: 22729 [2023-12-02 17:42:27,818 INFO L226 Difference]: Without dead ends: 22727 [2023-12-02 17:42:27,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1021, Invalid=3401, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 17:42:27,824 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1587 mSDsluCounter, 3822 mSDsCounter, 0 mSdLazyCounter, 5776 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 5789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:42:27,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1587 Valid, 4237 Invalid, 5789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5776 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-02 17:42:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22727 states. [2023-12-02 17:42:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22727 to 18035. [2023-12-02 17:42:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 18034 states have (on average 1.427747587889542) internal successors, (25748), 18034 states have internal predecessors, (25748), 0 states have call successors, (0), 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 17:42:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 25748 transitions. [2023-12-02 17:42:28,009 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 25748 transitions. Word has length 76 [2023-12-02 17:42:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:42:28,009 INFO L495 AbstractCegarLoop]: Abstraction has 18035 states and 25748 transitions. [2023-12-02 17:42:28,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 25748 transitions. [2023-12-02 17:42:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:42:28,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:42:28,010 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] [2023-12-02 17:42:28,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-12-02 17:42:28,011 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:42:28,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:42:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1118323750, now seen corresponding path program 1 times [2023-12-02 17:42:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:42:28,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046527325] [2023-12-02 17:42:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:42:28,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:42:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:42:32,559 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 17:42:32,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:42:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046527325] [2023-12-02 17:42:32,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046527325] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:42:32,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:42:32,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2023-12-02 17:42:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710033405] [2023-12-02 17:42:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:42:32,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 17:42:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:42:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 17:42:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:42:32,561 INFO L87 Difference]: Start difference. First operand 18035 states and 25748 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:42:38,850 INFO L93 Difference]: Finished difference Result 20974 states and 29861 transitions. [2023-12-02 17:42:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:42:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:42:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:42:38,866 INFO L225 Difference]: With dead ends: 20974 [2023-12-02 17:42:38,866 INFO L226 Difference]: Without dead ends: 20972 [2023-12-02 17:42:38,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=626, Invalid=2236, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:42:38,871 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1107 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 4059 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:42:38,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 4059 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2914 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 17:42:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20972 states. [2023-12-02 17:42:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20972 to 18047. [2023-12-02 17:42:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18047 states, 18046 states have (on average 1.4275739776127674) internal successors, (25762), 18046 states have internal predecessors, (25762), 0 states have call successors, (0), 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 17:42:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18047 states to 18047 states and 25762 transitions. [2023-12-02 17:42:39,026 INFO L78 Accepts]: Start accepts. Automaton has 18047 states and 25762 transitions. Word has length 76 [2023-12-02 17:42:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:42:39,027 INFO L495 AbstractCegarLoop]: Abstraction has 18047 states and 25762 transitions. [2023-12-02 17:42:39,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18047 states and 25762 transitions. [2023-12-02 17:42:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:42:39,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:42:39,028 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] [2023-12-02 17:42:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 17:42:39,028 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:42:39,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:42:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1816418298, now seen corresponding path program 1 times [2023-12-02 17:42:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:42:39,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853000796] [2023-12-02 17:42:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:42:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:42:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:42:43,128 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 17:42:43,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:42:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853000796] [2023-12-02 17:42:43,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853000796] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:42:43,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:42:43,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2023-12-02 17:42:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714952491] [2023-12-02 17:42:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:42:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 17:42:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:42:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 17:42:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:42:43,130 INFO L87 Difference]: Start difference. First operand 18047 states and 25762 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:42:49,036 INFO L93 Difference]: Finished difference Result 22771 states and 32384 transitions. [2023-12-02 17:42:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:42:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:42:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:42:49,054 INFO L225 Difference]: With dead ends: 22771 [2023-12-02 17:42:49,054 INFO L226 Difference]: Without dead ends: 22769 [2023-12-02 17:42:49,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=602, Invalid=2260, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:42:49,058 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 950 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:42:49,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 2697 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 17:42:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22769 states. [2023-12-02 17:42:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22769 to 18053. [2023-12-02 17:42:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18053 states, 18052 states have (on average 1.4274872590294705) internal successors, (25769), 18052 states have internal predecessors, (25769), 0 states have call successors, (0), 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 17:42:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18053 states to 18053 states and 25769 transitions. [2023-12-02 17:42:49,245 INFO L78 Accepts]: Start accepts. Automaton has 18053 states and 25769 transitions. Word has length 76 [2023-12-02 17:42:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:42:49,246 INFO L495 AbstractCegarLoop]: Abstraction has 18053 states and 25769 transitions. [2023-12-02 17:42:49,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 17:42:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 18053 states and 25769 transitions. [2023-12-02 17:42:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 17:42:49,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:42:49,247 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 17:42:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 17:42:49,247 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:42:49,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:42:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1856845882, now seen corresponding path program 1 times [2023-12-02 17:42:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:42:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858817794] [2023-12-02 17:42:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:42:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:42:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:03,207 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 17:43:03,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:03,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858817794] [2023-12-02 17:43:03,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858817794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:03,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:03,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2023-12-02 17:43:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095804152] [2023-12-02 17:43:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 17:43:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 17:43:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1733, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:43:03,209 INFO L87 Difference]: Start difference. First operand 18053 states and 25769 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 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 17:43:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:30,806 INFO L93 Difference]: Finished difference Result 20986 states and 29878 transitions. [2023-12-02 17:43:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-02 17:43:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 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 17:43:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:30,824 INFO L225 Difference]: With dead ends: 20986 [2023-12-02 17:43:30,824 INFO L226 Difference]: Without dead ends: 20984 [2023-12-02 17:43:30,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1630, Invalid=5012, Unknown=0, NotChecked=0, Total=6642 [2023-12-02 17:43:30,829 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1059 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 7045 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 4292 SdHoareTripleChecker+Invalid, 7053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:30,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 4292 Invalid, 7053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7045 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-12-02 17:43:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20984 states. [2023-12-02 17:43:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20984 to 19813. [2023-12-02 17:43:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19813 states, 19812 states have (on average 1.4258530183727034) internal successors, (28249), 19812 states have internal predecessors, (28249), 0 states have call successors, (0), 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 17:43:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19813 states to 19813 states and 28249 transitions. [2023-12-02 17:43:31,002 INFO L78 Accepts]: Start accepts. Automaton has 19813 states and 28249 transitions. Word has length 78 [2023-12-02 17:43:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:31,003 INFO L495 AbstractCegarLoop]: Abstraction has 19813 states and 28249 transitions. [2023-12-02 17:43:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 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 17:43:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19813 states and 28249 transitions. [2023-12-02 17:43:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 17:43:31,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:31,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-12-02 17:43:31,005 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:31,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 18671663, now seen corresponding path program 1 times [2023-12-02 17:43:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987011698] [2023-12-02 17:43:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:31,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987011698] [2023-12-02 17:43:31,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987011698] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:31,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:31,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:31,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381137358] [2023-12-02 17:43:31,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:31,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:31,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:31,082 INFO L87 Difference]: Start difference. First operand 19813 states and 28249 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 17:43:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:31,181 INFO L93 Difference]: Finished difference Result 30901 states and 44389 transitions. [2023-12-02 17:43:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 17:43:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:31,202 INFO L225 Difference]: With dead ends: 30901 [2023-12-02 17:43:31,202 INFO L226 Difference]: Without dead ends: 24003 [2023-12-02 17:43:31,208 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 17:43:31,209 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 416 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 17:43:31,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 416 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24003 states. [2023-12-02 17:43:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24003 to 22993. [2023-12-02 17:43:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22993 states, 22992 states have (on average 1.4251043841336117) internal successors, (32766), 22992 states have internal predecessors, (32766), 0 states have call successors, (0), 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 17:43:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22993 states to 22993 states and 32766 transitions. [2023-12-02 17:43:31,448 INFO L78 Accepts]: Start accepts. Automaton has 22993 states and 32766 transitions. Word has length 83 [2023-12-02 17:43:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:31,449 INFO L495 AbstractCegarLoop]: Abstraction has 22993 states and 32766 transitions. [2023-12-02 17:43:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 17:43:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 22993 states and 32766 transitions. [2023-12-02 17:43:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 17:43:31,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:31,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-12-02 17:43:31,451 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:31,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -940529228, now seen corresponding path program 1 times [2023-12-02 17:43:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:31,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475274207] [2023-12-02 17:43:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:31,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:31,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475274207] [2023-12-02 17:43:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475274207] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:31,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:31,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:31,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52108973] [2023-12-02 17:43:31,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:31,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:31,499 INFO L87 Difference]: Start difference. First operand 22993 states and 32766 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 17:43:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:31,640 INFO L93 Difference]: Finished difference Result 57772 states and 82385 transitions. [2023-12-02 17:43:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 17:43:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:31,673 INFO L225 Difference]: With dead ends: 57772 [2023-12-02 17:43:31,673 INFO L226 Difference]: Without dead ends: 36858 [2023-12-02 17:43:31,685 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 17:43:31,686 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 106 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:31,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 444 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36858 states. [2023-12-02 17:43:31,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36858 to 36856. [2023-12-02 17:43:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36856 states, 36855 states have (on average 1.415683082349749) internal successors, (52175), 36855 states have internal predecessors, (52175), 0 states have call successors, (0), 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 17:43:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36856 states to 36856 states and 52175 transitions. [2023-12-02 17:43:32,018 INFO L78 Accepts]: Start accepts. Automaton has 36856 states and 52175 transitions. Word has length 86 [2023-12-02 17:43:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:32,018 INFO L495 AbstractCegarLoop]: Abstraction has 36856 states and 52175 transitions. [2023-12-02 17:43:32,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 17:43:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 36856 states and 52175 transitions. [2023-12-02 17:43:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 17:43:32,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:32,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:32,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-12-02 17:43:32,022 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:32,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -696207980, now seen corresponding path program 1 times [2023-12-02 17:43:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593994313] [2023-12-02 17:43:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:32,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:32,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593994313] [2023-12-02 17:43:32,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593994313] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:32,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:32,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:32,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049248256] [2023-12-02 17:43:32,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:32,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:32,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:32,104 INFO L87 Difference]: Start difference. First operand 36856 states and 52175 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 17:43:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:32,267 INFO L93 Difference]: Finished difference Result 63586 states and 90714 transitions. [2023-12-02 17:43:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 17:43:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:32,307 INFO L225 Difference]: With dead ends: 63586 [2023-12-02 17:43:32,307 INFO L226 Difference]: Without dead ends: 46880 [2023-12-02 17:43:32,320 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 17:43:32,320 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 93 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:32,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 397 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46880 states. [2023-12-02 17:43:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46880 to 44364. [2023-12-02 17:43:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44364 states, 44363 states have (on average 1.413632982440322) internal successors, (62713), 44363 states have internal predecessors, (62713), 0 states have call successors, (0), 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 17:43:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44364 states to 44364 states and 62713 transitions. [2023-12-02 17:43:32,888 INFO L78 Accepts]: Start accepts. Automaton has 44364 states and 62713 transitions. Word has length 86 [2023-12-02 17:43:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:32,888 INFO L495 AbstractCegarLoop]: Abstraction has 44364 states and 62713 transitions. [2023-12-02 17:43:32,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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 17:43:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44364 states and 62713 transitions. [2023-12-02 17:43:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 17:43:32,891 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:32,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:32,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-12-02 17:43:32,891 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:32,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1261691199, now seen corresponding path program 1 times [2023-12-02 17:43:32,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:32,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568254206] [2023-12-02 17:43:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:32,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:32,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568254206] [2023-12-02 17:43:32,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568254206] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:32,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:32,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:32,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293736321] [2023-12-02 17:43:32,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:32,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:32,934 INFO L87 Difference]: Start difference. First operand 44364 states and 62713 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 17:43:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:33,310 INFO L93 Difference]: Finished difference Result 104016 states and 146961 transitions. [2023-12-02 17:43:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:33,311 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 17:43:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:33,377 INFO L225 Difference]: With dead ends: 104016 [2023-12-02 17:43:33,377 INFO L226 Difference]: Without dead ends: 68094 [2023-12-02 17:43:33,391 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 17:43:33,391 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 97 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:33,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 439 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68094 states. [2023-12-02 17:43:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68094 to 68092. [2023-12-02 17:43:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68092 states, 68091 states have (on average 1.4022851771893496) internal successors, (95483), 68091 states have internal predecessors, (95483), 0 states have call successors, (0), 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 17:43:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68092 states to 68092 states and 95483 transitions. [2023-12-02 17:43:34,062 INFO L78 Accepts]: Start accepts. Automaton has 68092 states and 95483 transitions. Word has length 89 [2023-12-02 17:43:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:34,062 INFO L495 AbstractCegarLoop]: Abstraction has 68092 states and 95483 transitions. [2023-12-02 17:43:34,062 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 17:43:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 68092 states and 95483 transitions. [2023-12-02 17:43:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 17:43:34,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:34,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:34,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-12-02 17:43:34,067 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:34,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -934428959, now seen corresponding path program 1 times [2023-12-02 17:43:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015403925] [2023-12-02 17:43:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:34,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015403925] [2023-12-02 17:43:34,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015403925] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:34,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:34,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:34,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320539752] [2023-12-02 17:43:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:34,145 INFO L87 Difference]: Start difference. First operand 68092 states and 95483 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 17:43:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:34,458 INFO L93 Difference]: Finished difference Result 128892 states and 181956 transitions. [2023-12-02 17:43:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:34,459 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 17:43:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:34,559 INFO L225 Difference]: With dead ends: 128892 [2023-12-02 17:43:34,560 INFO L226 Difference]: Without dead ends: 90842 [2023-12-02 17:43:34,588 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 17:43:34,588 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 88 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:34,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 378 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90842 states. [2023-12-02 17:43:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90842 to 84952. [2023-12-02 17:43:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84952 states, 84951 states have (on average 1.3970053324857858) internal successors, (118677), 84951 states have internal predecessors, (118677), 0 states have call successors, (0), 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 17:43:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84952 states to 84952 states and 118677 transitions. [2023-12-02 17:43:35,989 INFO L78 Accepts]: Start accepts. Automaton has 84952 states and 118677 transitions. Word has length 89 [2023-12-02 17:43:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:35,990 INFO L495 AbstractCegarLoop]: Abstraction has 84952 states and 118677 transitions. [2023-12-02 17:43:35,990 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 17:43:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 84952 states and 118677 transitions. [2023-12-02 17:43:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 17:43:35,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:35,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-12-02 17:43:35,993 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:35,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1073852939, now seen corresponding path program 1 times [2023-12-02 17:43:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:35,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660447083] [2023-12-02 17:43:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:36,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:36,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660447083] [2023-12-02 17:43:36,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660447083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:36,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:36,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:36,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761969170] [2023-12-02 17:43:36,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:36,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:36,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:36,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:36,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:36,165 INFO L87 Difference]: Start difference. First operand 84952 states and 118677 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 17:43:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:36,624 INFO L93 Difference]: Finished difference Result 172842 states and 240828 transitions. [2023-12-02 17:43:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2023-12-02 17:43:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:36,845 INFO L225 Difference]: With dead ends: 172842 [2023-12-02 17:43:36,845 INFO L226 Difference]: Without dead ends: 116868 [2023-12-02 17:43:36,872 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 17:43:36,872 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 88 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:36,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 425 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116868 states. [2023-12-02 17:43:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116868 to 116866. [2023-12-02 17:43:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116866 states, 116865 states have (on average 1.382278697642579) internal successors, (161540), 116865 states have internal predecessors, (161540), 0 states have call successors, (0), 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 17:43:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116866 states to 116866 states and 161540 transitions. [2023-12-02 17:43:38,203 INFO L78 Accepts]: Start accepts. Automaton has 116866 states and 161540 transitions. Word has length 92 [2023-12-02 17:43:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:38,204 INFO L495 AbstractCegarLoop]: Abstraction has 116866 states and 161540 transitions. [2023-12-02 17:43:38,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 17:43:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 116866 states and 161540 transitions. [2023-12-02 17:43:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 17:43:38,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:38,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-12-02 17:43:38,208 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:38,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -963608107, now seen corresponding path program 1 times [2023-12-02 17:43:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:38,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952254199] [2023-12-02 17:43:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:38,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:38,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952254199] [2023-12-02 17:43:38,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952254199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:38,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:38,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:38,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119551442] [2023-12-02 17:43:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:38,482 INFO L87 Difference]: Start difference. First operand 116866 states and 161540 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 17:43:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:39,261 INFO L93 Difference]: Finished difference Result 243907 states and 339069 transitions. [2023-12-02 17:43:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:39,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2023-12-02 17:43:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:39,458 INFO L225 Difference]: With dead ends: 243907 [2023-12-02 17:43:39,458 INFO L226 Difference]: Without dead ends: 164161 [2023-12-02 17:43:39,489 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 17:43:39,490 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 83 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:39,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 359 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164161 states. [2023-12-02 17:43:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164161 to 152184. [2023-12-02 17:43:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152184 states, 152183 states have (on average 1.3728734484140803) internal successors, (208928), 152183 states have internal predecessors, (208928), 0 states have call successors, (0), 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 17:43:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152184 states to 152184 states and 208928 transitions. [2023-12-02 17:43:41,688 INFO L78 Accepts]: Start accepts. Automaton has 152184 states and 208928 transitions. Word has length 92 [2023-12-02 17:43:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:41,688 INFO L495 AbstractCegarLoop]: Abstraction has 152184 states and 208928 transitions. [2023-12-02 17:43:41,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 17:43:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 152184 states and 208928 transitions. [2023-12-02 17:43:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 17:43:41,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:41,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-12-02 17:43:41,693 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:41,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 352010873, now seen corresponding path program 1 times [2023-12-02 17:43:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:41,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900402960] [2023-12-02 17:43:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:41,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:41,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900402960] [2023-12-02 17:43:41,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900402960] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:41,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:41,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:41,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734554258] [2023-12-02 17:43:41,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:41,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:41,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:41,766 INFO L87 Difference]: Start difference. First operand 152184 states and 208928 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 17:43:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:42,757 INFO L93 Difference]: Finished difference Result 356636 states and 490899 transitions. [2023-12-02 17:43:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:42,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2023-12-02 17:43:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:43,040 INFO L225 Difference]: With dead ends: 356636 [2023-12-02 17:43:43,040 INFO L226 Difference]: Without dead ends: 224210 [2023-12-02 17:43:43,099 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 17:43:43,100 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:43,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 359 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224210 states. [2023-12-02 17:43:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224210 to 209340. [2023-12-02 17:43:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209340 states, 209339 states have (on average 1.3629853968921224) internal successors, (285326), 209339 states have internal predecessors, (285326), 0 states have call successors, (0), 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 17:43:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209340 states to 209340 states and 285326 transitions. [2023-12-02 17:43:46,448 INFO L78 Accepts]: Start accepts. Automaton has 209340 states and 285326 transitions. Word has length 95 [2023-12-02 17:43:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:46,448 INFO L495 AbstractCegarLoop]: Abstraction has 209340 states and 285326 transitions. [2023-12-02 17:43:46,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 17:43:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 209340 states and 285326 transitions. [2023-12-02 17:43:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 17:43:46,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:46,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:46,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-12-02 17:43:46,456 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:46,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1046294284, now seen corresponding path program 1 times [2023-12-02 17:43:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094613740] [2023-12-02 17:43:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:43:46,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094613740] [2023-12-02 17:43:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094613740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:46,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:46,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459754933] [2023-12-02 17:43:46,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:46,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:46,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:46,521 INFO L87 Difference]: Start difference. First operand 209340 states and 285326 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 17:43:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:47,706 INFO L93 Difference]: Finished difference Result 377908 states and 515796 transitions. [2023-12-02 17:43:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:47,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 17:43:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:47,921 INFO L225 Difference]: With dead ends: 377908 [2023-12-02 17:43:47,922 INFO L226 Difference]: Without dead ends: 170484 [2023-12-02 17:43:47,990 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 17:43:47,990 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 85 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:47,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 425 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170484 states. [2023-12-02 17:43:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170484 to 125425. [2023-12-02 17:43:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125425 states, 125424 states have (on average 1.3503954586044138) internal successors, (169372), 125424 states have internal predecessors, (169372), 0 states have call successors, (0), 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 17:43:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125425 states to 125425 states and 169372 transitions. [2023-12-02 17:43:50,175 INFO L78 Accepts]: Start accepts. Automaton has 125425 states and 169372 transitions. Word has length 100 [2023-12-02 17:43:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:50,176 INFO L495 AbstractCegarLoop]: Abstraction has 125425 states and 169372 transitions. [2023-12-02 17:43:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 17:43:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 125425 states and 169372 transitions. [2023-12-02 17:43:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:43:50,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:50,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-12-02 17:43:50,186 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:50,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 67223481, now seen corresponding path program 1 times [2023-12-02 17:43:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92240114] [2023-12-02 17:43:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:43:50,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92240114] [2023-12-02 17:43:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92240114] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:50,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:50,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:43:50,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048549466] [2023-12-02 17:43:50,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:50,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:43:50,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:50,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:43:50,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:43:50,375 INFO L87 Difference]: Start difference. First operand 125425 states and 169372 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:51,717 INFO L93 Difference]: Finished difference Result 380552 states and 512648 transitions. [2023-12-02 17:43:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:43:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-12-02 17:43:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:52,015 INFO L225 Difference]: With dead ends: 380552 [2023-12-02 17:43:52,015 INFO L226 Difference]: Without dead ends: 257442 [2023-12-02 17:43:52,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:43:52,061 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1129 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:52,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 372 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:43:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257442 states. [2023-12-02 17:43:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257442 to 190194. [2023-12-02 17:43:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190194 states, 190193 states have (on average 1.3408327330658858) internal successors, (255017), 190193 states have internal predecessors, (255017), 0 states have call successors, (0), 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 17:43:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190194 states to 190194 states and 255017 transitions. [2023-12-02 17:43:55,170 INFO L78 Accepts]: Start accepts. Automaton has 190194 states and 255017 transitions. Word has length 113 [2023-12-02 17:43:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:55,171 INFO L495 AbstractCegarLoop]: Abstraction has 190194 states and 255017 transitions. [2023-12-02 17:43:55,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 190194 states and 255017 transitions. [2023-12-02 17:43:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:43:55,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:55,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:55,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-12-02 17:43:55,187 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:55,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash 653265332, now seen corresponding path program 1 times [2023-12-02 17:43:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:55,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3635129] [2023-12-02 17:43:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:56,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3635129] [2023-12-02 17:43:56,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3635129] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:43:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866016203] [2023-12-02 17:43:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:56,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:56,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:56,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:43:56,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:43:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:56,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 17:43:56,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:43:58,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:58,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866016203] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:43:58,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [15] total 30 [2023-12-02 17:43:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748734318] [2023-12-02 17:43:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:43:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:43:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:43:58,912 INFO L87 Difference]: Start difference. First operand 190194 states and 255017 transitions. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 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 17:44:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:00,763 INFO L93 Difference]: Finished difference Result 305598 states and 408829 transitions. [2023-12-02 17:44:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:44:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 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 113 [2023-12-02 17:44:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:01,014 INFO L225 Difference]: With dead ends: 305598 [2023-12-02 17:44:01,014 INFO L226 Difference]: Without dead ends: 219239 [2023-12-02 17:44:01,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:44:01,060 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 947 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:01,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1422 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:44:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219239 states. [2023-12-02 17:44:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219239 to 205060. [2023-12-02 17:44:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205060 states, 205059 states have (on average 1.3388390658298344) internal successors, (274541), 205059 states have internal predecessors, (274541), 0 states have call successors, (0), 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 17:44:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205060 states to 205060 states and 274541 transitions. [2023-12-02 17:44:03,889 INFO L78 Accepts]: Start accepts. Automaton has 205060 states and 274541 transitions. Word has length 113 [2023-12-02 17:44:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:44:03,889 INFO L495 AbstractCegarLoop]: Abstraction has 205060 states and 274541 transitions. [2023-12-02 17:44:03,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 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 17:44:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 205060 states and 274541 transitions. [2023-12-02 17:44:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:44:03,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:03,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:03,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:44:04,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:44:04,098 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:04,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1852749611, now seen corresponding path program 1 times [2023-12-02 17:44:04,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:44:04,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142354504] [2023-12-02 17:44:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:04,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:44:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:44:04,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:44:04,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142354504] [2023-12-02 17:44:04,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142354504] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:44:04,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:44:04,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:44:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62239470] [2023-12-02 17:44:04,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:44:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:44:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:44:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:44:04,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:44:04,623 INFO L87 Difference]: Start difference. First operand 205060 states and 274541 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 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 17:44:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:06,629 INFO L93 Difference]: Finished difference Result 611054 states and 819331 transitions. [2023-12-02 17:44:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:44:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 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 113 [2023-12-02 17:44:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:07,221 INFO L225 Difference]: With dead ends: 611054 [2023-12-02 17:44:07,221 INFO L226 Difference]: Without dead ends: 425054 [2023-12-02 17:44:07,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:44:07,322 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1528 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:07,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1528 Valid, 356 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:44:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425054 states. [2023-12-02 17:44:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425054 to 308413. [2023-12-02 17:44:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308413 states, 308412 states have (on average 1.330979339325318) internal successors, (410490), 308412 states have internal predecessors, (410490), 0 states have call successors, (0), 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 17:44:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308413 states to 308413 states and 410490 transitions. [2023-12-02 17:44:12,244 INFO L78 Accepts]: Start accepts. Automaton has 308413 states and 410490 transitions. Word has length 113 [2023-12-02 17:44:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:44:12,244 INFO L495 AbstractCegarLoop]: Abstraction has 308413 states and 410490 transitions. [2023-12-02 17:44:12,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 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 17:44:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 308413 states and 410490 transitions. [2023-12-02 17:44:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:44:12,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:12,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-12-02 17:44:12,255 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:12,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1349704784, now seen corresponding path program 1 times [2023-12-02 17:44:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:44:12,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857694804] [2023-12-02 17:44:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:12,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:44:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:14,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:44:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857694804] [2023-12-02 17:44:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857694804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:44:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611568038] [2023-12-02 17:44:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:14,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:44:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:44:14,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:44:14,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:44:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:14,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 17:44:14,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:44:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:44:16,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:44:16,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611568038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:44:16,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:44:16,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [24] total 39 [2023-12-02 17:44:16,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945322567] [2023-12-02 17:44:16,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:44:16,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:44:16,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:44:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:44:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:44:16,298 INFO L87 Difference]: Start difference. First operand 308413 states and 410490 transitions. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:18,723 INFO L93 Difference]: Finished difference Result 492949 states and 655668 transitions. [2023-12-02 17:44:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:44:18,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-12-02 17:44:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:19,201 INFO L225 Difference]: With dead ends: 492949 [2023-12-02 17:44:19,201 INFO L226 Difference]: Without dead ends: 358666 [2023-12-02 17:44:19,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:44:19,273 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 1053 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:19,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 1476 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:44:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358666 states. [2023-12-02 17:44:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358666 to 331521. [2023-12-02 17:44:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331521 states, 331520 states have (on average 1.3299288127413127) internal successors, (440898), 331520 states have internal predecessors, (440898), 0 states have call successors, (0), 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 17:44:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331521 states to 331521 states and 440898 transitions. [2023-12-02 17:44:23,853 INFO L78 Accepts]: Start accepts. Automaton has 331521 states and 440898 transitions. Word has length 113 [2023-12-02 17:44:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:44:23,854 INFO L495 AbstractCegarLoop]: Abstraction has 331521 states and 440898 transitions. [2023-12-02 17:44:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 331521 states and 440898 transitions. [2023-12-02 17:44:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:44:23,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:23,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:23,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:44:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-12-02 17:44:24,066 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:24,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -863280647, now seen corresponding path program 1 times [2023-12-02 17:44:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:44:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914768477] [2023-12-02 17:44:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:44:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:44:24,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:44:24,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914768477] [2023-12-02 17:44:24,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914768477] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:44:24,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:44:24,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:44:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071655331] [2023-12-02 17:44:24,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:44:24,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:44:24,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:44:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:44:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:44:24,231 INFO L87 Difference]: Start difference. First operand 331521 states and 440898 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:27,056 INFO L93 Difference]: Finished difference Result 952257 states and 1269284 transitions. [2023-12-02 17:44:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:44:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-12-02 17:44:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:28,388 INFO L225 Difference]: With dead ends: 952257 [2023-12-02 17:44:28,389 INFO L226 Difference]: Without dead ends: 649500 [2023-12-02 17:44:28,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:44:28,501 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1271 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:28,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 374 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:44:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649500 states. [2023-12-02 17:44:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649500 to 494037. [2023-12-02 17:44:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494037 states, 494036 states have (on average 1.3226080690475999) internal successors, (653416), 494036 states have internal predecessors, (653416), 0 states have call successors, (0), 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 17:44:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494037 states to 494037 states and 653416 transitions. [2023-12-02 17:44:36,109 INFO L78 Accepts]: Start accepts. Automaton has 494037 states and 653416 transitions. Word has length 113 [2023-12-02 17:44:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:44:36,110 INFO L495 AbstractCegarLoop]: Abstraction has 494037 states and 653416 transitions. [2023-12-02 17:44:36,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 494037 states and 653416 transitions. [2023-12-02 17:44:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:44:36,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:36,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:36,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-12-02 17:44:36,153 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:36,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1219241548, now seen corresponding path program 1 times [2023-12-02 17:44:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:44:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331063494] [2023-12-02 17:44:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:44:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:37,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:44:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331063494] [2023-12-02 17:44:37,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331063494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:44:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432109061] [2023-12-02 17:44:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:44:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:44:37,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:44:37,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:44:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:38,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 17:44:38,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:44:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:44:39,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:44:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432109061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:44:39,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:44:39,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [24] total 39 [2023-12-02 17:44:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380267272] [2023-12-02 17:44:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:44:39,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:44:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:44:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:44:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:44:39,974 INFO L87 Difference]: Start difference. First operand 494037 states and 653416 transitions. Second operand has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 16 states have internal predecessors, (110), 0 states have call successors, (0), 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 17:44:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:43,764 INFO L93 Difference]: Finished difference Result 848354 states and 1121561 transitions. [2023-12-02 17:44:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:44:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 16 states have internal predecessors, (110), 0 states have call successors, (0), 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 113 [2023-12-02 17:44:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:44,608 INFO L225 Difference]: With dead ends: 848354 [2023-12-02 17:44:44,608 INFO L226 Difference]: Without dead ends: 638579 [2023-12-02 17:44:44,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:44:44,706 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 1128 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:44,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 1968 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:44:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638579 states. [2023-12-02 17:44:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638579 to 543638. [2023-12-02 17:44:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543638 states, 543637 states have (on average 1.3218415965064925) internal successors, (718602), 543637 states have internal predecessors, (718602), 0 states have call successors, (0), 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 17:44:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543638 states to 543638 states and 718602 transitions. [2023-12-02 17:44:52,666 INFO L78 Accepts]: Start accepts. Automaton has 543638 states and 718602 transitions. Word has length 113 [2023-12-02 17:44:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:44:52,666 INFO L495 AbstractCegarLoop]: Abstraction has 543638 states and 718602 transitions. [2023-12-02 17:44:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 16 states have internal predecessors, (110), 0 states have call successors, (0), 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 17:44:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 543638 states and 718602 transitions. [2023-12-02 17:44:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:44:52,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:52,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:52,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:44:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf587c75-7d8a-4b16-80d7-94be28c10bb1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:44:52,891 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:52,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:52,891 INFO L85 PathProgramCache]: Analyzing trace with hash 782208363, now seen corresponding path program 1 times [2023-12-02 17:44:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:44:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626271682] [2023-12-02 17:44:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:44:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:44:53,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:44:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626271682] [2023-12-02 17:44:53,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626271682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:44:53,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:44:53,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:44:53,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83456633] [2023-12-02 17:44:53,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:44:53,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:44:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:44:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:44:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:44:53,067 INFO L87 Difference]: Start difference. First operand 543638 states and 718602 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 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 17:44:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:58,031 INFO L93 Difference]: Finished difference Result 1522367 states and 2017513 transitions. [2023-12-02 17:44:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:44:58,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 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 113 [2023-12-02 17:44:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:59,569 INFO L225 Difference]: With dead ends: 1522367 [2023-12-02 17:44:59,569 INFO L226 Difference]: Without dead ends: 1032350 [2023-12-02 17:44:59,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:44:59,778 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1087 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:59,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 426 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:45:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032350 states.