./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91 --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 bf9b303f0455860ff73b360d674f9b56750c61e03c2589dbf0115b0e5bdacb76 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:20:42,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:20:42,642 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:20:42,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:20:42,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:20:42,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:20:42,710 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:20:42,711 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:20:42,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:20:42,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:20:42,718 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:20:42,718 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:20:42,719 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:20:42,721 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:20:42,721 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:20:42,722 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:20:42,722 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:20:42,723 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:20:42,723 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:20:42,724 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:20:42,724 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:20:42,725 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:20:42,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:20:42,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:20:42,727 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:20:42,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:20:42,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:20:42,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:20:42,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:20:42,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:20:42,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:20:42,731 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:20:42,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:20:42,732 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:20:42,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:20:42,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:20:42,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:20:42,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:20:42,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:20:42,743 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:20:42,743 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:20:42,744 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:20:42,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:20:42,744 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:20:42,745 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:20:42,745 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:20:42,745 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:20:42,745 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_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf9b303f0455860ff73b360d674f9b56750c61e03c2589dbf0115b0e5bdacb76 [2023-11-24 23:20:43,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:20:43,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:20:43,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:20:43,139 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:20:43,141 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:20:43,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2023-11-24 23:20:46,341 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:20:46,640 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:20:46,641 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2023-11-24 23:20:46,660 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/data/57281f77d/cdb9aeb915674af2b78efa87ca7d2bea/FLAG2004228d2 [2023-11-24 23:20:46,677 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/data/57281f77d/cdb9aeb915674af2b78efa87ca7d2bea [2023-11-24 23:20:46,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:20:46,682 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:20:46,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:20:46,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:20:46,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:20:46,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:20:46" (1/1) ... [2023-11-24 23:20:46,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ca20b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:46, skipping insertion in model container [2023-11-24 23:20:46,697 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:20:46" (1/1) ... [2023-11-24 23:20:46,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:20:47,079 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_9689e883-c53b-41c2-9412-b697fc661eec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[11904,11917] [2023-11-24 23:20:47,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:20:47,199 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:20:47,327 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_9689e883-c53b-41c2-9412-b697fc661eec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[11904,11917] [2023-11-24 23:20:47,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:20:47,414 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:20:47,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47 WrapperNode [2023-11-24 23:20:47,414 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:20:47,415 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:20:47,415 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:20:47,416 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:20:47,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,499 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1041 [2023-11-24 23:20:47,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:20:47,501 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:20:47,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:20:47,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:20:47,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,552 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:20:47,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:20:47,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:20:47,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:20:47,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (1/1) ... [2023-11-24 23:20:47,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:20:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:47,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:20:47,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9689e883-c53b-41c2-9412-b697fc661eec/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:20:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:20:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:20:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:20:47,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:20:47,863 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:20:47,865 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:20:48,767 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:20:49,145 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:20:49,145 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:20:49,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:49 BoogieIcfgContainer [2023-11-24 23:20:49,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:20:49,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:20:49,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:20:49,153 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:20:49,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:20:46" (1/3) ... [2023-11-24 23:20:49,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3aac46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:49, skipping insertion in model container [2023-11-24 23:20:49,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:47" (2/3) ... [2023-11-24 23:20:49,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3aac46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:49, skipping insertion in model container [2023-11-24 23:20:49,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:49" (3/3) ... [2023-11-24 23:20:49,158 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2023-11-24 23:20:49,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:20:49,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:20:49,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:20:49,238 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;@409d84bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:20:49,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:20:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 218 states, 175 states have (on average 1.6514285714285715) internal successors, (289), 217 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:20:49,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:49,257 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] [2023-11-24 23:20:49,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:49,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash -500998109, now seen corresponding path program 1 times [2023-11-24 23:20:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:49,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192354758] [2023-11-24 23:20:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:50,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:50,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192354758] [2023-11-24 23:20:50,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192354758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:50,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:50,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:20:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681794378] [2023-11-24 23:20:50,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:50,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:20:50,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:20:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:20:50,085 INFO L87 Difference]: Start difference. First operand has 218 states, 175 states have (on average 1.6514285714285715) internal successors, (289), 217 states have internal predecessors, (289), 0 states have call successors, (0), 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 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:50,345 INFO L93 Difference]: Finished difference Result 359 states and 499 transitions. [2023-11-24 23:20:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:20:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2023-11-24 23:20:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:50,359 INFO L225 Difference]: With dead ends: 359 [2023-11-24 23:20:50,360 INFO L226 Difference]: Without dead ends: 175 [2023-11-24 23:20:50,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:20:50,371 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 68 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:50,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 676 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-24 23:20:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-11-24 23:20:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.367816091954023) internal successors, (238), 174 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 238 transitions. [2023-11-24 23:20:50,428 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 238 transitions. Word has length 54 [2023-11-24 23:20:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:50,428 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 238 transitions. [2023-11-24 23:20:50,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 238 transitions. [2023-11-24 23:20:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-24 23:20:50,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:50,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:50,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:20:50,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:50,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -379611176, now seen corresponding path program 1 times [2023-11-24 23:20:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:50,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800658910] [2023-11-24 23:20:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:50,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:50,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800658910] [2023-11-24 23:20:50,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800658910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:50,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:50,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:50,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314521447] [2023-11-24 23:20:50,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:50,638 INFO L87 Difference]: Start difference. First operand 175 states and 238 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:50,738 INFO L93 Difference]: Finished difference Result 380 states and 540 transitions. [2023-11-24 23:20:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-24 23:20:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:50,741 INFO L225 Difference]: With dead ends: 380 [2023-11-24 23:20:50,741 INFO L226 Difference]: Without dead ends: 254 [2023-11-24 23:20:50,743 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 [2023-11-24 23:20:50,744 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 131 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:50,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 376 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-24 23:20:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2023-11-24 23:20:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.3984063745019921) internal successors, (351), 251 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 351 transitions. [2023-11-24 23:20:50,778 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 351 transitions. Word has length 93 [2023-11-24 23:20:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:50,779 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 351 transitions. [2023-11-24 23:20:50,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 351 transitions. [2023-11-24 23:20:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 23:20:50,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:50,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:50,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:20:50,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:50,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -586155296, now seen corresponding path program 1 times [2023-11-24 23:20:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:50,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229155384] [2023-11-24 23:20:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:50,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:50,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229155384] [2023-11-24 23:20:50,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229155384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:50,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:50,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:50,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122883357] [2023-11-24 23:20:51,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:51,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:51,002 INFO L87 Difference]: Start difference. First operand 252 states and 351 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) [2023-11-24 23:20:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:51,101 INFO L93 Difference]: Finished difference Result 589 states and 848 transitions. [2023-11-24 23:20:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:51,101 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 99 [2023-11-24 23:20:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:51,106 INFO L225 Difference]: With dead ends: 589 [2023-11-24 23:20:51,107 INFO L226 Difference]: Without dead ends: 392 [2023-11-24 23:20:51,115 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 [2023-11-24 23:20:51,117 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 125 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:51,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 372 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-24 23:20:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 390. [2023-11-24 23:20:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.4215938303341902) internal successors, (553), 389 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 553 transitions. [2023-11-24 23:20:51,179 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 553 transitions. Word has length 99 [2023-11-24 23:20:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:51,180 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 553 transitions. [2023-11-24 23:20:51,180 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) [2023-11-24 23:20:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 553 transitions. [2023-11-24 23:20:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-24 23:20:51,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:51,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:51,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:20:51,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:51,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1633652804, now seen corresponding path program 1 times [2023-11-24 23:20:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:51,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457958989] [2023-11-24 23:20:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:51,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:51,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457958989] [2023-11-24 23:20:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457958989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:51,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609006773] [2023-11-24 23:20:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:51,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:51,402 INFO L87 Difference]: Start difference. First operand 390 states and 553 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:51,485 INFO L93 Difference]: Finished difference Result 965 states and 1399 transitions. [2023-11-24 23:20:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2023-11-24 23:20:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:51,493 INFO L225 Difference]: With dead ends: 965 [2023-11-24 23:20:51,493 INFO L226 Difference]: Without dead ends: 636 [2023-11-24 23:20:51,495 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 [2023-11-24 23:20:51,498 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 119 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:51,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 368 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-11-24 23:20:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 634. [2023-11-24 23:20:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.434439178515008) internal successors, (908), 633 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 908 transitions. [2023-11-24 23:20:51,522 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 908 transitions. Word has length 105 [2023-11-24 23:20:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:51,523 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 908 transitions. [2023-11-24 23:20:51,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 908 transitions. [2023-11-24 23:20:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-24 23:20:51,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:51,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:51,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:20:51,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:51,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 118027566, now seen corresponding path program 1 times [2023-11-24 23:20:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:51,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279707031] [2023-11-24 23:20:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:51,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:51,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279707031] [2023-11-24 23:20:51,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279707031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:51,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:51,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:51,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335777042] [2023-11-24 23:20:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:51,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:51,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:51,722 INFO L87 Difference]: Start difference. First operand 634 states and 908 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:51,808 INFO L93 Difference]: Finished difference Result 1627 states and 2361 transitions. [2023-11-24 23:20:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:51,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2023-11-24 23:20:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:51,816 INFO L225 Difference]: With dead ends: 1627 [2023-11-24 23:20:51,816 INFO L226 Difference]: Without dead ends: 1060 [2023-11-24 23:20:51,818 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 [2023-11-24 23:20:51,819 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 113 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:51,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 392 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-11-24 23:20:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1058. [2023-11-24 23:20:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 1.4370860927152318) internal successors, (1519), 1057 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1519 transitions. [2023-11-24 23:20:51,849 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1519 transitions. Word has length 111 [2023-11-24 23:20:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:51,850 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1519 transitions. [2023-11-24 23:20:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1519 transitions. [2023-11-24 23:20:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-24 23:20:51,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:51,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:20:51,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:51,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1984360100, now seen corresponding path program 1 times [2023-11-24 23:20:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:51,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256472951] [2023-11-24 23:20:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:52,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:52,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256472951] [2023-11-24 23:20:52,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256472951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:52,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:52,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958645239] [2023-11-24 23:20:52,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:52,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:52,010 INFO L87 Difference]: Start difference. First operand 1058 states and 1519 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:52,089 INFO L93 Difference]: Finished difference Result 2765 states and 3995 transitions. [2023-11-24 23:20:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:52,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-24 23:20:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:52,105 INFO L225 Difference]: With dead ends: 2765 [2023-11-24 23:20:52,105 INFO L226 Difference]: Without dead ends: 1780 [2023-11-24 23:20:52,107 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 [2023-11-24 23:20:52,112 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 107 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:52,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 360 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2023-11-24 23:20:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1778. [2023-11-24 23:20:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.4305008441193021) internal successors, (2542), 1777 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2542 transitions. [2023-11-24 23:20:52,169 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2542 transitions. Word has length 117 [2023-11-24 23:20:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:52,170 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2542 transitions. [2023-11-24 23:20:52,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2542 transitions. [2023-11-24 23:20:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:20:52,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:52,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:52,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:20:52,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:52,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash -826451047, now seen corresponding path program 1 times [2023-11-24 23:20:52,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:52,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320472588] [2023-11-24 23:20:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:52,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:52,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:52,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320472588] [2023-11-24 23:20:52,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320472588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:52,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:52,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166886146] [2023-11-24 23:20:52,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:52,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:52,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:52,333 INFO L87 Difference]: Start difference. First operand 1778 states and 2542 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:52,420 INFO L93 Difference]: Finished difference Result 4663 states and 6673 transitions. [2023-11-24 23:20:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-11-24 23:20:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:52,437 INFO L225 Difference]: With dead ends: 4663 [2023-11-24 23:20:52,437 INFO L226 Difference]: Without dead ends: 2964 [2023-11-24 23:20:52,439 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 [2023-11-24 23:20:52,440 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 101 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:52,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 368 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2023-11-24 23:20:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2962. [2023-11-24 23:20:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 1.414724755150287) internal successors, (4189), 2961 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4189 transitions. [2023-11-24 23:20:52,570 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4189 transitions. Word has length 123 [2023-11-24 23:20:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:52,570 INFO L495 AbstractCegarLoop]: Abstraction has 2962 states and 4189 transitions. [2023-11-24 23:20:52,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4189 transitions. [2023-11-24 23:20:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-24 23:20:52,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:52,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:52,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:20:52,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:52,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 761110462, now seen corresponding path program 1 times [2023-11-24 23:20:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280975841] [2023-11-24 23:20:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:52,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280975841] [2023-11-24 23:20:52,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280975841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:52,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:20:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532033274] [2023-11-24 23:20:52,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:52,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:20:52,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:52,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:20:52,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:20:52,943 INFO L87 Difference]: Start difference. First operand 2962 states and 4189 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:53,859 INFO L93 Difference]: Finished difference Result 10435 states and 14686 transitions. [2023-11-24 23:20:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:20:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-11-24 23:20:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:53,900 INFO L225 Difference]: With dead ends: 10435 [2023-11-24 23:20:53,900 INFO L226 Difference]: Without dead ends: 7557 [2023-11-24 23:20:53,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:20:53,905 INFO L413 NwaCegarLoop]: 1013 mSDtfsCounter, 1196 mSDsluCounter, 2840 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:53,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 3853 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2023-11-24 23:20:54,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 3915. [2023-11-24 23:20:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 1.378385283597343) internal successors, (5395), 3914 states have internal predecessors, (5395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 5395 transitions. [2023-11-24 23:20:54,064 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 5395 transitions. Word has length 129 [2023-11-24 23:20:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:54,064 INFO L495 AbstractCegarLoop]: Abstraction has 3915 states and 5395 transitions. [2023-11-24 23:20:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 5395 transitions. [2023-11-24 23:20:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-24 23:20:54,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:54,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:20:54,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:54,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:54,075 INFO L85 PathProgramCache]: Analyzing trace with hash 855550221, now seen corresponding path program 1 times [2023-11-24 23:20:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:54,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870264593] [2023-11-24 23:20:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:54,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:54,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870264593] [2023-11-24 23:20:54,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870264593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:54,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:54,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:20:54,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883079800] [2023-11-24 23:20:54,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:54,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:20:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:20:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:20:54,652 INFO L87 Difference]: Start difference. First operand 3915 states and 5395 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:55,103 INFO L93 Difference]: Finished difference Result 7748 states and 10693 transitions. [2023-11-24 23:20:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:20:55,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2023-11-24 23:20:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:55,123 INFO L225 Difference]: With dead ends: 7748 [2023-11-24 23:20:55,124 INFO L226 Difference]: Without dead ends: 3917 [2023-11-24 23:20:55,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:20:55,132 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 720 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:55,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 874 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2023-11-24 23:20:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3915. [2023-11-24 23:20:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 1.3776188042922841) internal successors, (5392), 3914 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 5392 transitions. [2023-11-24 23:20:55,269 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 5392 transitions. Word has length 131 [2023-11-24 23:20:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:55,270 INFO L495 AbstractCegarLoop]: Abstraction has 3915 states and 5392 transitions. [2023-11-24 23:20:55,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 5392 transitions. [2023-11-24 23:20:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-24 23:20:55,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:55,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:55,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:20:55,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:55,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1534775732, now seen corresponding path program 1 times [2023-11-24 23:20:55,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:55,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086934009] [2023-11-24 23:20:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:55,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:55,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086934009] [2023-11-24 23:20:55,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086934009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:55,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:55,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:55,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63799320] [2023-11-24 23:20:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:55,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:55,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:55,427 INFO L87 Difference]: Start difference. First operand 3915 states and 5392 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:55,518 INFO L93 Difference]: Finished difference Result 9346 states and 12972 transitions. [2023-11-24 23:20:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2023-11-24 23:20:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:55,547 INFO L225 Difference]: With dead ends: 9346 [2023-11-24 23:20:55,547 INFO L226 Difference]: Without dead ends: 5514 [2023-11-24 23:20:55,552 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 [2023-11-24 23:20:55,553 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 150 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:55,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 424 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2023-11-24 23:20:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 5512. [2023-11-24 23:20:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5512 states, 5511 states have (on average 1.380693159136273) internal successors, (7609), 5511 states have internal predecessors, (7609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 7609 transitions. [2023-11-24 23:20:55,768 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 7609 transitions. Word has length 131 [2023-11-24 23:20:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:55,769 INFO L495 AbstractCegarLoop]: Abstraction has 5512 states and 7609 transitions. [2023-11-24 23:20:55,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 7609 transitions. [2023-11-24 23:20:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:20:55,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:55,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:55,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:20:55,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:55,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash 905674915, now seen corresponding path program 1 times [2023-11-24 23:20:55,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:55,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853045691] [2023-11-24 23:20:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:55,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853045691] [2023-11-24 23:20:55,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853045691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:55,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:55,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752841161] [2023-11-24 23:20:55,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:55,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:55,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:55,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:55,934 INFO L87 Difference]: Start difference. First operand 5512 states and 7609 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:56,220 INFO L93 Difference]: Finished difference Result 15764 states and 21720 transitions. [2023-11-24 23:20:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:20:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:56,271 INFO L225 Difference]: With dead ends: 15764 [2023-11-24 23:20:56,271 INFO L226 Difference]: Without dead ends: 10848 [2023-11-24 23:20:56,279 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 [2023-11-24 23:20:56,280 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 142 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:56,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 252 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10848 states. [2023-11-24 23:20:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 10846. [2023-11-24 23:20:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10846 states, 10845 states have (on average 1.3629322268326418) internal successors, (14781), 10845 states have internal predecessors, (14781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10846 states to 10846 states and 14781 transitions. [2023-11-24 23:20:56,559 INFO L78 Accepts]: Start accepts. Automaton has 10846 states and 14781 transitions. Word has length 132 [2023-11-24 23:20:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:56,560 INFO L495 AbstractCegarLoop]: Abstraction has 10846 states and 14781 transitions. [2023-11-24 23:20:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 10846 states and 14781 transitions. [2023-11-24 23:20:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:20:56,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:56,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:56,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:20:56,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:56,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -696794808, now seen corresponding path program 1 times [2023-11-24 23:20:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:56,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214240644] [2023-11-24 23:20:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:56,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:56,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214240644] [2023-11-24 23:20:56,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214240644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:56,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:56,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094758351] [2023-11-24 23:20:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:56,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:56,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:56,782 INFO L87 Difference]: Start difference. First operand 10846 states and 14781 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:57,056 INFO L93 Difference]: Finished difference Result 26423 states and 36064 transitions. [2023-11-24 23:20:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:20:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:57,087 INFO L225 Difference]: With dead ends: 26423 [2023-11-24 23:20:57,087 INFO L226 Difference]: Without dead ends: 16693 [2023-11-24 23:20:57,100 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 [2023-11-24 23:20:57,101 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 127 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:57,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 358 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16693 states. [2023-11-24 23:20:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16693 to 16691. [2023-11-24 23:20:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16691 states, 16690 states have (on average 1.3545835829838226) internal successors, (22608), 16690 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16691 states to 16691 states and 22608 transitions. [2023-11-24 23:20:57,528 INFO L78 Accepts]: Start accepts. Automaton has 16691 states and 22608 transitions. Word has length 132 [2023-11-24 23:20:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:57,529 INFO L495 AbstractCegarLoop]: Abstraction has 16691 states and 22608 transitions. [2023-11-24 23:20:57,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 16691 states and 22608 transitions. [2023-11-24 23:20:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:20:57,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:57,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:57,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:20:57,570 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:57,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 216700173, now seen corresponding path program 1 times [2023-11-24 23:20:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:57,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603639457] [2023-11-24 23:20:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:57,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603639457] [2023-11-24 23:20:57,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603639457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:57,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:57,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:57,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187150670] [2023-11-24 23:20:57,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:57,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:57,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:57,694 INFO L87 Difference]: Start difference. First operand 16691 states and 22608 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:58,151 INFO L93 Difference]: Finished difference Result 48049 states and 64976 transitions. [2023-11-24 23:20:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:20:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:58,218 INFO L225 Difference]: With dead ends: 48049 [2023-11-24 23:20:58,218 INFO L226 Difference]: Without dead ends: 33079 [2023-11-24 23:20:58,239 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 [2023-11-24 23:20:58,240 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 126 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:58,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 262 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:20:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33079 states. [2023-11-24 23:20:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33079 to 33077. [2023-11-24 23:20:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33077 states, 33076 states have (on average 1.3441165799975814) internal successors, (44458), 33076 states have internal predecessors, (44458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33077 states to 33077 states and 44458 transitions. [2023-11-24 23:20:59,252 INFO L78 Accepts]: Start accepts. Automaton has 33077 states and 44458 transitions. Word has length 132 [2023-11-24 23:20:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:59,253 INFO L495 AbstractCegarLoop]: Abstraction has 33077 states and 44458 transitions. [2023-11-24 23:20:59,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 33077 states and 44458 transitions. [2023-11-24 23:20:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:20:59,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:59,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:59,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:20:59,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:59,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1734643726, now seen corresponding path program 1 times [2023-11-24 23:20:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:59,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068446340] [2023-11-24 23:20:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:59,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:59,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068446340] [2023-11-24 23:20:59,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068446340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:59,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:59,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:59,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787302905] [2023-11-24 23:20:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:59,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:59,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:59,557 INFO L87 Difference]: Start difference. First operand 33077 states and 44458 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:00,216 INFO L93 Difference]: Finished difference Result 95001 states and 127324 transitions. [2023-11-24 23:21:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:00,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:00,369 INFO L225 Difference]: With dead ends: 95001 [2023-11-24 23:21:00,370 INFO L226 Difference]: Without dead ends: 65559 [2023-11-24 23:21:00,422 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 [2023-11-24 23:21:00,422 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 113 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:00,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 272 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:21:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65559 states. [2023-11-24 23:21:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65559 to 65557. [2023-11-24 23:21:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65557 states, 65556 states have (on average 1.3338519738849228) internal successors, (87442), 65556 states have internal predecessors, (87442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65557 states to 65557 states and 87442 transitions. [2023-11-24 23:21:01,899 INFO L78 Accepts]: Start accepts. Automaton has 65557 states and 87442 transitions. Word has length 132 [2023-11-24 23:21:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:01,900 INFO L495 AbstractCegarLoop]: Abstraction has 65557 states and 87442 transitions. [2023-11-24 23:21:01,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 65557 states and 87442 transitions. [2023-11-24 23:21:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:02,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:02,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:21:02,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:02,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash -13312851, now seen corresponding path program 1 times [2023-11-24 23:21:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458382077] [2023-11-24 23:21:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:02,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458382077] [2023-11-24 23:21:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458382077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:02,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:21:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391249477] [2023-11-24 23:21:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:02,633 INFO L87 Difference]: Start difference. First operand 65557 states and 87442 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:03,541 INFO L93 Difference]: Finished difference Result 130839 states and 174531 transitions. [2023-11-24 23:21:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:21:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:03,704 INFO L225 Difference]: With dead ends: 130839 [2023-11-24 23:21:03,704 INFO L226 Difference]: Without dead ends: 65557 [2023-11-24 23:21:03,747 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 [2023-11-24 23:21:03,748 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 560 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:03,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 160 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65557 states. [2023-11-24 23:21:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65557 to 65557. [2023-11-24 23:21:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65557 states, 65556 states have (on average 1.3184758069436817) internal successors, (86434), 65556 states have internal predecessors, (86434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65557 states to 65557 states and 86434 transitions. [2023-11-24 23:21:05,070 INFO L78 Accepts]: Start accepts. Automaton has 65557 states and 86434 transitions. Word has length 132 [2023-11-24 23:21:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:05,071 INFO L495 AbstractCegarLoop]: Abstraction has 65557 states and 86434 transitions. [2023-11-24 23:21:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 65557 states and 86434 transitions. [2023-11-24 23:21:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:05,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:05,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:05,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:21:05,198 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:05,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1917715273, now seen corresponding path program 1 times [2023-11-24 23:21:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:05,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294703529] [2023-11-24 23:21:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:05,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:05,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:05,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294703529] [2023-11-24 23:21:05,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294703529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:05,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:05,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:21:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770290945] [2023-11-24 23:21:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:05,486 INFO L87 Difference]: Start difference. First operand 65557 states and 86434 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:06,287 INFO L93 Difference]: Finished difference Result 103935 states and 137523 transitions. [2023-11-24 23:21:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:21:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:06,385 INFO L225 Difference]: With dead ends: 103935 [2023-11-24 23:21:06,385 INFO L226 Difference]: Without dead ends: 42573 [2023-11-24 23:21:06,430 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 [2023-11-24 23:21:06,430 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 603 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:06,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 128 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:21:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42573 states. [2023-11-24 23:21:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42573 to 42573. [2023-11-24 23:21:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42573 states, 42572 states have (on average 1.3121300385229728) internal successors, (55860), 42572 states have internal predecessors, (55860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42573 states to 42573 states and 55860 transitions. [2023-11-24 23:21:07,510 INFO L78 Accepts]: Start accepts. Automaton has 42573 states and 55860 transitions. Word has length 132 [2023-11-24 23:21:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:07,511 INFO L495 AbstractCegarLoop]: Abstraction has 42573 states and 55860 transitions. [2023-11-24 23:21:07,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42573 states and 55860 transitions. [2023-11-24 23:21:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:07,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:07,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 23:21:07,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:07,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 315069847, now seen corresponding path program 1 times [2023-11-24 23:21:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:07,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887672509] [2023-11-24 23:21:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:07,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:07,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887672509] [2023-11-24 23:21:07,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887672509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:07,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:07,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:21:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695353764] [2023-11-24 23:21:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:07,779 INFO L87 Difference]: Start difference. First operand 42573 states and 55860 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:08,167 INFO L93 Difference]: Finished difference Result 85051 states and 111609 transitions. [2023-11-24 23:21:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:21:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:08,227 INFO L225 Difference]: With dead ends: 85051 [2023-11-24 23:21:08,227 INFO L226 Difference]: Without dead ends: 42573 [2023-11-24 23:21:08,253 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 [2023-11-24 23:21:08,254 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 568 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:08,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 144 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42573 states. [2023-11-24 23:21:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42573 to 42573. [2023-11-24 23:21:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42573 states, 42572 states have (on average 1.3000093958470356) internal successors, (55344), 42572 states have internal predecessors, (55344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42573 states to 42573 states and 55344 transitions. [2023-11-24 23:21:09,236 INFO L78 Accepts]: Start accepts. Automaton has 42573 states and 55344 transitions. Word has length 132 [2023-11-24 23:21:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:09,236 INFO L495 AbstractCegarLoop]: Abstraction has 42573 states and 55344 transitions. [2023-11-24 23:21:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 42573 states and 55344 transitions. [2023-11-24 23:21:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:09,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:09,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:09,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 23:21:09,296 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:09,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -18132489, now seen corresponding path program 1 times [2023-11-24 23:21:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:09,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181190010] [2023-11-24 23:21:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:09,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181190010] [2023-11-24 23:21:09,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181190010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:09,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:09,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:09,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569483731] [2023-11-24 23:21:09,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:09,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:09,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:09,570 INFO L87 Difference]: Start difference. First operand 42573 states and 55344 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:10,161 INFO L93 Difference]: Finished difference Result 64521 states and 83938 transitions. [2023-11-24 23:21:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:10,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:10,208 INFO L225 Difference]: With dead ends: 64521 [2023-11-24 23:21:10,214 INFO L226 Difference]: Without dead ends: 26211 [2023-11-24 23:21:10,230 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 [2023-11-24 23:21:10,231 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 68 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:10,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 352 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26211 states. [2023-11-24 23:21:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26211 to 24673. [2023-11-24 23:21:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24673 states, 24672 states have (on average 1.2906939040207523) internal successors, (31844), 24672 states have internal predecessors, (31844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24673 states to 24673 states and 31844 transitions. [2023-11-24 23:21:10,705 INFO L78 Accepts]: Start accepts. Automaton has 24673 states and 31844 transitions. Word has length 132 [2023-11-24 23:21:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:10,706 INFO L495 AbstractCegarLoop]: Abstraction has 24673 states and 31844 transitions. [2023-11-24 23:21:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24673 states and 31844 transitions. [2023-11-24 23:21:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:10,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:10,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 23:21:10,737 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:10,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1863502748, now seen corresponding path program 1 times [2023-11-24 23:21:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:10,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375235217] [2023-11-24 23:21:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:10,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:10,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375235217] [2023-11-24 23:21:10,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375235217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:10,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:10,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208382624] [2023-11-24 23:21:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:10,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:10,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:10,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:10,965 INFO L87 Difference]: Start difference. First operand 24673 states and 31844 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:11,125 INFO L93 Difference]: Finished difference Result 35613 states and 45846 transitions. [2023-11-24 23:21:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:11,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:11,142 INFO L225 Difference]: With dead ends: 35613 [2023-11-24 23:21:11,142 INFO L226 Difference]: Without dead ends: 13191 [2023-11-24 23:21:11,160 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 [2023-11-24 23:21:11,160 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 60 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:11,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 347 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2023-11-24 23:21:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 13189. [2023-11-24 23:21:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13189 states, 13188 states have (on average 1.2720655141037307) internal successors, (16776), 13188 states have internal predecessors, (16776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13189 states to 13189 states and 16776 transitions. [2023-11-24 23:21:11,416 INFO L78 Accepts]: Start accepts. Automaton has 13189 states and 16776 transitions. Word has length 132 [2023-11-24 23:21:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:11,416 INFO L495 AbstractCegarLoop]: Abstraction has 13189 states and 16776 transitions. [2023-11-24 23:21:11,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 13189 states and 16776 transitions. [2023-11-24 23:21:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:11,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:11,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:11,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 23:21:11,433 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:11,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1717730456, now seen corresponding path program 1 times [2023-11-24 23:21:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:11,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060804055] [2023-11-24 23:21:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:11,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:11,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060804055] [2023-11-24 23:21:11,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060804055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:11,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:11,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108341285] [2023-11-24 23:21:11,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:11,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:11,639 INFO L87 Difference]: Start difference. First operand 13189 states and 16776 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:11,742 INFO L93 Difference]: Finished difference Result 19009 states and 24122 transitions. [2023-11-24 23:21:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:11,751 INFO L225 Difference]: With dead ends: 19009 [2023-11-24 23:21:11,752 INFO L226 Difference]: Without dead ends: 7075 [2023-11-24 23:21:11,759 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 [2023-11-24 23:21:11,760 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 50 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:11,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 341 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2023-11-24 23:21:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 7073. [2023-11-24 23:21:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7073 states, 7072 states have (on average 1.2539592760180995) internal successors, (8868), 7072 states have internal predecessors, (8868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 8868 transitions. [2023-11-24 23:21:12,026 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 8868 transitions. Word has length 132 [2023-11-24 23:21:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:12,027 INFO L495 AbstractCegarLoop]: Abstraction has 7073 states and 8868 transitions. [2023-11-24 23:21:12,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 8868 transitions. [2023-11-24 23:21:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:12,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:12,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:12,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 23:21:12,034 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:12,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:12,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1052212765, now seen corresponding path program 1 times [2023-11-24 23:21:12,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828796588] [2023-11-24 23:21:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:12,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:12,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828796588] [2023-11-24 23:21:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828796588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:12,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582766274] [2023-11-24 23:21:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:12,194 INFO L87 Difference]: Start difference. First operand 7073 states and 8868 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:12,254 INFO L93 Difference]: Finished difference Result 10061 states and 12598 transitions. [2023-11-24 23:21:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:12,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:12,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:12,258 INFO L225 Difference]: With dead ends: 10061 [2023-11-24 23:21:12,259 INFO L226 Difference]: Without dead ends: 3771 [2023-11-24 23:21:12,262 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 [2023-11-24 23:21:12,263 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 44 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:12,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 342 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2023-11-24 23:21:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3769. [2023-11-24 23:21:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3768 states have (on average 1.2346072186836519) internal successors, (4652), 3768 states have internal predecessors, (4652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 4652 transitions. [2023-11-24 23:21:12,312 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 4652 transitions. Word has length 132 [2023-11-24 23:21:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:12,312 INFO L495 AbstractCegarLoop]: Abstraction has 3769 states and 4652 transitions. [2023-11-24 23:21:12,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 4652 transitions. [2023-11-24 23:21:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 23:21:12,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:12,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 23:21:12,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:12,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1080054889, now seen corresponding path program 1 times [2023-11-24 23:21:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:12,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597300024] [2023-11-24 23:21:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:12,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597300024] [2023-11-24 23:21:12,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597300024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:12,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:12,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:21:12,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641972900] [2023-11-24 23:21:12,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:12,768 INFO L87 Difference]: Start difference. First operand 3769 states and 4652 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:12,836 INFO L93 Difference]: Finished difference Result 6819 states and 8413 transitions. [2023-11-24 23:21:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:21:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-24 23:21:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:12,841 INFO L225 Difference]: With dead ends: 6819 [2023-11-24 23:21:12,841 INFO L226 Difference]: Without dead ends: 3769 [2023-11-24 23:21:12,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:12,846 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 1 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:12,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 532 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2023-11-24 23:21:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3769. [2023-11-24 23:21:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3768 states have (on average 1.2176220806794056) internal successors, (4588), 3768 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 4588 transitions. [2023-11-24 23:21:12,896 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 4588 transitions. Word has length 132 [2023-11-24 23:21:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:12,896 INFO L495 AbstractCegarLoop]: Abstraction has 3769 states and 4588 transitions. [2023-11-24 23:21:12,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 4588 transitions. [2023-11-24 23:21:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-24 23:21:12,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:12,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:12,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 23:21:12,901 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:12,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:12,901 INFO L85 PathProgramCache]: Analyzing trace with hash 267164399, now seen corresponding path program 1 times [2023-11-24 23:21:12,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:12,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241277195] [2023-11-24 23:21:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:12,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:13,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:13,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241277195] [2023-11-24 23:21:13,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241277195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:13,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:13,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809060933] [2023-11-24 23:21:13,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:13,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:13,005 INFO L87 Difference]: Start difference. First operand 3769 states and 4588 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:13,064 INFO L93 Difference]: Finished difference Result 6787 states and 8317 transitions. [2023-11-24 23:21:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2023-11-24 23:21:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:13,069 INFO L225 Difference]: With dead ends: 6787 [2023-11-24 23:21:13,069 INFO L226 Difference]: Without dead ends: 3641 [2023-11-24 23:21:13,071 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 [2023-11-24 23:21:13,072 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 0 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:13,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 347 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2023-11-24 23:21:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3641. [2023-11-24 23:21:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 1.1967032967032967) internal successors, (4356), 3640 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 4356 transitions. [2023-11-24 23:21:13,122 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 4356 transitions. Word has length 134 [2023-11-24 23:21:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 3641 states and 4356 transitions. [2023-11-24 23:21:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 4356 transitions. [2023-11-24 23:21:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-24 23:21:13,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:13,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 23:21:13,126 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:13,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1681757396, now seen corresponding path program 1 times [2023-11-24 23:21:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000762075] [2023-11-24 23:21:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:13,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:13,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000762075] [2023-11-24 23:21:13,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000762075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:13,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:13,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343874365] [2023-11-24 23:21:13,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:13,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:13,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:13,278 INFO L87 Difference]: Start difference. First operand 3641 states and 4356 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:13,325 INFO L93 Difference]: Finished difference Result 5153 states and 6186 transitions. [2023-11-24 23:21:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:13,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2023-11-24 23:21:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:13,328 INFO L225 Difference]: With dead ends: 5153 [2023-11-24 23:21:13,329 INFO L226 Difference]: Without dead ends: 2023 [2023-11-24 23:21:13,330 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 [2023-11-24 23:21:13,331 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 35 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:13,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2023-11-24 23:21:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2021. [2023-11-24 23:21:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2020 states have (on average 1.1722772277227722) internal successors, (2368), 2020 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2368 transitions. [2023-11-24 23:21:13,359 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2368 transitions. Word has length 135 [2023-11-24 23:21:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:13,359 INFO L495 AbstractCegarLoop]: Abstraction has 2021 states and 2368 transitions. [2023-11-24 23:21:13,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2368 transitions. [2023-11-24 23:21:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-24 23:21:13,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:13,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 23:21:13,362 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:13,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1404597144, now seen corresponding path program 1 times [2023-11-24 23:21:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:13,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739316156] [2023-11-24 23:21:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:13,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:13,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739316156] [2023-11-24 23:21:13,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739316156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:13,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:13,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:13,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469653939] [2023-11-24 23:21:13,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:13,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:13,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:13,510 INFO L87 Difference]: Start difference. First operand 2021 states and 2368 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:13,549 INFO L93 Difference]: Finished difference Result 2857 states and 3362 transitions. [2023-11-24 23:21:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2023-11-24 23:21:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:13,551 INFO L225 Difference]: With dead ends: 2857 [2023-11-24 23:21:13,551 INFO L226 Difference]: Without dead ends: 1227 [2023-11-24 23:21:13,553 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 [2023-11-24 23:21:13,553 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 39 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:13,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 291 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:21:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2023-11-24 23:21:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1225. [2023-11-24 23:21:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 1.1470588235294117) internal successors, (1404), 1224 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1404 transitions. [2023-11-24 23:21:13,569 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1404 transitions. Word has length 135 [2023-11-24 23:21:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:13,570 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1404 transitions. [2023-11-24 23:21:13,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1404 transitions. [2023-11-24 23:21:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-24 23:21:13,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:13,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:13,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 23:21:13,573 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:13,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 411551369, now seen corresponding path program 1 times [2023-11-24 23:21:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:13,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435017074] [2023-11-24 23:21:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:13,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435017074] [2023-11-24 23:21:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435017074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:13,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:13,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:21:13,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826603129] [2023-11-24 23:21:13,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:13,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:13,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:13,950 INFO L87 Difference]: Start difference. First operand 1225 states and 1404 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:14,086 INFO L93 Difference]: Finished difference Result 1735 states and 1985 transitions. [2023-11-24 23:21:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:21:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2023-11-24 23:21:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:14,089 INFO L225 Difference]: With dead ends: 1735 [2023-11-24 23:21:14,089 INFO L226 Difference]: Without dead ends: 1733 [2023-11-24 23:21:14,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:21:14,090 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 261 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 776 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2023-11-24 23:21:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1241. [2023-11-24 23:21:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 1.1387096774193548) internal successors, (1412), 1240 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1412 transitions. [2023-11-24 23:21:14,110 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1412 transitions. Word has length 138 [2023-11-24 23:21:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:14,111 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 1412 transitions. [2023-11-24 23:21:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1412 transitions. [2023-11-24 23:21:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-24 23:21:14,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:14,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:14,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-24 23:21:14,113 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:14,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:14,114 INFO L85 PathProgramCache]: Analyzing trace with hash -805833984, now seen corresponding path program 1 times [2023-11-24 23:21:14,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:14,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478799589] [2023-11-24 23:21:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat