./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2 --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 b9a6c0b24d5d607558501714a91a15c3c9ad61c83cb06d37fa1f6444538df81a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:32:17,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:32:17,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:32:17,645 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:32:17,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:32:17,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:32:17,669 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:32:17,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:32:17,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:32:17,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:32:17,672 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:32:17,672 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:32:17,674 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:32:17,674 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:32:17,674 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:32:17,677 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:32:17,677 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:32:17,678 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:32:17,678 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:32:17,678 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:32:17,679 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:32:17,679 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:32:17,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:32:17,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:32:17,681 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:32:17,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:32:17,682 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:32:17,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:32:17,682 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:32:17,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:32:17,683 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:32:17,683 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:32:17,683 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:32:17,684 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:32:17,684 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:32:17,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:32:17,685 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:32:17,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:32:17,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:17,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:32:17,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:32:17,688 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:32:17,689 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:32:17,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:32:17,689 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:32:17,689 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:32:17,689 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:32:17,690 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_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9a6c0b24d5d607558501714a91a15c3c9ad61c83cb06d37fa1f6444538df81a [2024-11-02 12:32:17,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:32:18,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:32:18,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:32:18,009 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:32:18,010 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:32:18,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-02 12:32:20,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:32:20,488 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:32:20,488 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2024-11-02 12:32:20,505 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/data/e4bfe6234/485a7e0bf99f45fbb91752e36e3d56fe/FLAG3ea343461 [2024-11-02 12:32:20,810 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/data/e4bfe6234/485a7e0bf99f45fbb91752e36e3d56fe [2024-11-02 12:32:20,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:32:20,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:32:20,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:20,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:32:20,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:32:20,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:32:20" (1/1) ... [2024-11-02 12:32:20,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e16c3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:20, skipping insertion in model container [2024-11-02 12:32:20,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:32:20" (1/1) ... [2024-11-02 12:32:20,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:32:21,186 WARN L251 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_2e105c8f-0f77-4ab5-a012-cbe6844e7959/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2024-11-02 12:32:21,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:21,267 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:32:21,328 WARN L251 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_2e105c8f-0f77-4ab5-a012-cbe6844e7959/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2024-11-02 12:32:21,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:21,383 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:32:21,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21 WrapperNode [2024-11-02 12:32:21,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:21,385 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:21,385 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:32:21,385 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:32:21,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,463 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 634 [2024-11-02 12:32:21,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:21,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:32:21,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:32:21,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:32:21,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,492 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,501 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,504 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:32:21,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:32:21,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:32:21,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:32:21,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (1/1) ... [2024-11-02 12:32:21,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:21,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:21,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:32:21,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:32:21,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:32:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:32:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:32:21,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:32:21,769 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:32:21,771 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:32:22,597 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2024-11-02 12:32:22,598 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:32:23,030 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:32:23,031 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:32:23,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:23 BoogieIcfgContainer [2024-11-02 12:32:23,031 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:32:23,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:32:23,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:32:23,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:32:23,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:32:20" (1/3) ... [2024-11-02 12:32:23,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6e248a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:23, skipping insertion in model container [2024-11-02 12:32:23,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:21" (2/3) ... [2024-11-02 12:32:23,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6e248a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:23, skipping insertion in model container [2024-11-02 12:32:23,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:23" (3/3) ... [2024-11-02 12:32:23,045 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2024-11-02 12:32:23,065 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:32:23,066 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:32:23,153 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:32:23,161 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26cf6dd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:32:23,161 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:32:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 85 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 12:32:23,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:23,184 INFO L215 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] [2024-11-02 12:32:23,184 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:23,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1965802179, now seen corresponding path program 1 times [2024-11-02 12:32:23,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:23,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297852787] [2024-11-02 12:32:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:23,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:23,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297852787] [2024-11-02 12:32:23,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297852787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:23,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:23,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:23,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150996137] [2024-11-02 12:32:23,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:23,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:23,820 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 85 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:23,953 INFO L93 Difference]: Finished difference Result 188 states and 311 transitions. [2024-11-02 12:32:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:23,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2024-11-02 12:32:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:23,967 INFO L225 Difference]: With dead ends: 188 [2024-11-02 12:32:23,967 INFO L226 Difference]: Without dead ends: 127 [2024-11-02 12:32:23,970 INFO L431 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 [2024-11-02 12:32:23,973 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 91 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:23,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-02 12:32:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-02 12:32:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.5) internal successors, (186), 124 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 186 transitions. [2024-11-02 12:32:24,025 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 186 transitions. Word has length 37 [2024-11-02 12:32:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:24,027 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 186 transitions. [2024-11-02 12:32:24,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 186 transitions. [2024-11-02 12:32:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 12:32:24,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:24,031 INFO L215 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] [2024-11-02 12:32:24,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:32:24,032 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:24,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 938619083, now seen corresponding path program 1 times [2024-11-02 12:32:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:24,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428026944] [2024-11-02 12:32:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:24,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:24,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428026944] [2024-11-02 12:32:24,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428026944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:24,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:24,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:24,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309714812] [2024-11-02 12:32:24,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:24,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:24,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:24,286 INFO L87 Difference]: Start difference. First operand 125 states and 186 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:24,370 INFO L93 Difference]: Finished difference Result 276 states and 431 transitions. [2024-11-02 12:32:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2024-11-02 12:32:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:24,372 INFO L225 Difference]: With dead ends: 276 [2024-11-02 12:32:24,372 INFO L226 Difference]: Without dead ends: 180 [2024-11-02 12:32:24,373 INFO L431 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 [2024-11-02 12:32:24,375 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 81 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:24,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-02 12:32:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-11-02 12:32:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 177 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2024-11-02 12:32:24,393 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 39 [2024-11-02 12:32:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:24,397 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2024-11-02 12:32:24,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2024-11-02 12:32:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-02 12:32:24,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:24,399 INFO L215 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] [2024-11-02 12:32:24,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:32:24,399 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:24,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2080335096, now seen corresponding path program 1 times [2024-11-02 12:32:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:24,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291586225] [2024-11-02 12:32:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:24,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291586225] [2024-11-02 12:32:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291586225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101911563] [2024-11-02 12:32:24,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:24,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:24,579 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:24,651 INFO L93 Difference]: Finished difference Result 438 states and 690 transitions. [2024-11-02 12:32:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2024-11-02 12:32:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:24,657 INFO L225 Difference]: With dead ends: 438 [2024-11-02 12:32:24,661 INFO L226 Difference]: Without dead ends: 290 [2024-11-02 12:32:24,662 INFO L431 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 [2024-11-02 12:32:24,663 INFO L432 NwaCegarLoop]: 152 mSDtfsCounter, 82 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:24,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 242 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-02 12:32:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2024-11-02 12:32:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.5574912891986064) internal successors, (447), 287 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 447 transitions. [2024-11-02 12:32:24,701 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 447 transitions. Word has length 41 [2024-11-02 12:32:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:24,701 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 447 transitions. [2024-11-02 12:32:24,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 447 transitions. [2024-11-02 12:32:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 12:32:24,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:24,703 INFO L215 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] [2024-11-02 12:32:24,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:32:24,704 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:24,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1713059214, now seen corresponding path program 1 times [2024-11-02 12:32:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:24,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835411815] [2024-11-02 12:32:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:24,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:24,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835411815] [2024-11-02 12:32:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835411815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:24,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:24,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:24,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320147274] [2024-11-02 12:32:24,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:24,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:24,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:24,896 INFO L87 Difference]: Start difference. First operand 288 states and 447 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:24,953 INFO L93 Difference]: Finished difference Result 707 states and 1122 transitions. [2024-11-02 12:32:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2024-11-02 12:32:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:24,958 INFO L225 Difference]: With dead ends: 707 [2024-11-02 12:32:24,958 INFO L226 Difference]: Without dead ends: 449 [2024-11-02 12:32:24,961 INFO L431 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 [2024-11-02 12:32:24,962 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 81 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:24,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:24,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-02 12:32:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2024-11-02 12:32:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5717488789237668) internal successors, (701), 446 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 701 transitions. [2024-11-02 12:32:24,987 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 701 transitions. Word has length 43 [2024-11-02 12:32:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:24,987 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 701 transitions. [2024-11-02 12:32:24,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 701 transitions. [2024-11-02 12:32:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:32:24,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:24,989 INFO L215 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] [2024-11-02 12:32:24,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:32:24,989 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:24,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash -334539291, now seen corresponding path program 1 times [2024-11-02 12:32:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22449083] [2024-11-02 12:32:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:25,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:25,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22449083] [2024-11-02 12:32:25,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22449083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:25,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:25,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896661446] [2024-11-02 12:32:25,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:25,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:25,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:25,148 INFO L87 Difference]: Start difference. First operand 447 states and 701 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:25,218 INFO L93 Difference]: Finished difference Result 1147 states and 1834 transitions. [2024-11-02 12:32:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2024-11-02 12:32:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:25,222 INFO L225 Difference]: With dead ends: 1147 [2024-11-02 12:32:25,222 INFO L226 Difference]: Without dead ends: 743 [2024-11-02 12:32:25,223 INFO L431 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 [2024-11-02 12:32:25,224 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 77 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:25,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2024-11-02 12:32:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 741. [2024-11-02 12:32:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.5837837837837838) internal successors, (1172), 740 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1172 transitions. [2024-11-02 12:32:25,273 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1172 transitions. Word has length 45 [2024-11-02 12:32:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:25,273 INFO L471 AbstractCegarLoop]: Abstraction has 741 states and 1172 transitions. [2024-11-02 12:32:25,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1172 transitions. [2024-11-02 12:32:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:32:25,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:25,278 INFO L215 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] [2024-11-02 12:32:25,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:32:25,279 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:25,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -312170093, now seen corresponding path program 1 times [2024-11-02 12:32:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536225585] [2024-11-02 12:32:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:25,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:25,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536225585] [2024-11-02 12:32:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536225585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:25,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:25,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:25,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107926367] [2024-11-02 12:32:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:25,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:25,408 INFO L87 Difference]: Start difference. First operand 741 states and 1172 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:25,474 INFO L93 Difference]: Finished difference Result 1856 states and 2966 transitions. [2024-11-02 12:32:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2024-11-02 12:32:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:25,486 INFO L225 Difference]: With dead ends: 1856 [2024-11-02 12:32:25,487 INFO L226 Difference]: Without dead ends: 1158 [2024-11-02 12:32:25,489 INFO L431 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 [2024-11-02 12:32:25,491 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:25,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 210 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2024-11-02 12:32:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1156. [2024-11-02 12:32:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.587012987012987) internal successors, (1833), 1155 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1833 transitions. [2024-11-02 12:32:25,524 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1833 transitions. Word has length 47 [2024-11-02 12:32:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:25,525 INFO L471 AbstractCegarLoop]: Abstraction has 1156 states and 1833 transitions. [2024-11-02 12:32:25,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1833 transitions. [2024-11-02 12:32:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 12:32:25,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:25,531 INFO L215 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] [2024-11-02 12:32:25,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:32:25,532 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:25,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1501020928, now seen corresponding path program 1 times [2024-11-02 12:32:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405634526] [2024-11-02 12:32:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:25,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405634526] [2024-11-02 12:32:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405634526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:25,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:25,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:32:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249424420] [2024-11-02 12:32:25,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:25,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:25,739 INFO L87 Difference]: Start difference. First operand 1156 states and 1833 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:26,055 INFO L93 Difference]: Finished difference Result 2931 states and 4669 transitions. [2024-11-02 12:32:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:32:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2024-11-02 12:32:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:26,065 INFO L225 Difference]: With dead ends: 2931 [2024-11-02 12:32:26,065 INFO L226 Difference]: Without dead ends: 1831 [2024-11-02 12:32:26,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:32:26,070 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 459 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:26,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 806 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:32:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2024-11-02 12:32:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1821. [2024-11-02 12:32:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5785714285714285) internal successors, (2873), 1820 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2873 transitions. [2024-11-02 12:32:26,163 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2873 transitions. Word has length 49 [2024-11-02 12:32:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:26,165 INFO L471 AbstractCegarLoop]: Abstraction has 1821 states and 2873 transitions. [2024-11-02 12:32:26,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2873 transitions. [2024-11-02 12:32:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:32:26,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:26,169 INFO L215 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] [2024-11-02 12:32:26,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:32:26,169 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:26,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash 650487300, now seen corresponding path program 1 times [2024-11-02 12:32:26,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:26,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409263583] [2024-11-02 12:32:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:26,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:26,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409263583] [2024-11-02 12:32:26,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409263583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:26,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:26,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168165269] [2024-11-02 12:32:26,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:26,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:26,389 INFO L87 Difference]: Start difference. First operand 1821 states and 2873 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:26,503 INFO L93 Difference]: Finished difference Result 3588 states and 5679 transitions. [2024-11-02 12:32:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:26,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2024-11-02 12:32:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:26,510 INFO L225 Difference]: With dead ends: 3588 [2024-11-02 12:32:26,510 INFO L226 Difference]: Without dead ends: 1823 [2024-11-02 12:32:26,512 INFO L431 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 [2024-11-02 12:32:26,514 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 152 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:26,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 299 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2024-11-02 12:32:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2024-11-02 12:32:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.571978021978022) internal successors, (2861), 1820 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2861 transitions. [2024-11-02 12:32:26,561 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2861 transitions. Word has length 50 [2024-11-02 12:32:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:26,561 INFO L471 AbstractCegarLoop]: Abstraction has 1821 states and 2861 transitions. [2024-11-02 12:32:26,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2861 transitions. [2024-11-02 12:32:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-02 12:32:26,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:26,563 INFO L215 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] [2024-11-02 12:32:26,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:32:26,564 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:26,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1367676345, now seen corresponding path program 1 times [2024-11-02 12:32:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122160529] [2024-11-02 12:32:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:26,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122160529] [2024-11-02 12:32:26,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122160529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:26,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396020629] [2024-11-02 12:32:26,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:26,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:26,747 INFO L87 Difference]: Start difference. First operand 1821 states and 2861 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:26,862 INFO L93 Difference]: Finished difference Result 3588 states and 5655 transitions. [2024-11-02 12:32:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2024-11-02 12:32:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:26,869 INFO L225 Difference]: With dead ends: 3588 [2024-11-02 12:32:26,870 INFO L226 Difference]: Without dead ends: 1823 [2024-11-02 12:32:26,875 INFO L431 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 [2024-11-02 12:32:26,879 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 160 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:26,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 305 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2024-11-02 12:32:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2024-11-02 12:32:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5653846153846154) internal successors, (2849), 1820 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2849 transitions. [2024-11-02 12:32:26,946 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2849 transitions. Word has length 51 [2024-11-02 12:32:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:26,947 INFO L471 AbstractCegarLoop]: Abstraction has 1821 states and 2849 transitions. [2024-11-02 12:32:26,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2849 transitions. [2024-11-02 12:32:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-02 12:32:26,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:26,949 INFO L215 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] [2024-11-02 12:32:26,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 12:32:26,949 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:26,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 498318123, now seen corresponding path program 1 times [2024-11-02 12:32:26,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462867810] [2024-11-02 12:32:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:27,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:27,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462867810] [2024-11-02 12:32:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462867810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:27,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:27,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:27,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211429205] [2024-11-02 12:32:27,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:27,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:27,137 INFO L87 Difference]: Start difference. First operand 1821 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:27,243 INFO L93 Difference]: Finished difference Result 3588 states and 5631 transitions. [2024-11-02 12:32:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2024-11-02 12:32:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:27,252 INFO L225 Difference]: With dead ends: 3588 [2024-11-02 12:32:27,253 INFO L226 Difference]: Without dead ends: 1823 [2024-11-02 12:32:27,255 INFO L431 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 [2024-11-02 12:32:27,255 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 158 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:27,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 308 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2024-11-02 12:32:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2024-11-02 12:32:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5587912087912088) internal successors, (2837), 1820 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2837 transitions. [2024-11-02 12:32:27,302 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2837 transitions. Word has length 52 [2024-11-02 12:32:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:27,303 INFO L471 AbstractCegarLoop]: Abstraction has 1821 states and 2837 transitions. [2024-11-02 12:32:27,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2837 transitions. [2024-11-02 12:32:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:32:27,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:27,304 INFO L215 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] [2024-11-02 12:32:27,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 12:32:27,305 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:27,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 625035068, now seen corresponding path program 1 times [2024-11-02 12:32:27,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:27,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433759228] [2024-11-02 12:32:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:27,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433759228] [2024-11-02 12:32:27,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433759228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:27,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:27,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:32:27,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332148607] [2024-11-02 12:32:27,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:27,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:27,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:27,593 INFO L87 Difference]: Start difference. First operand 1821 states and 2837 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) [2024-11-02 12:32:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:27,771 INFO L93 Difference]: Finished difference Result 3588 states and 5607 transitions. [2024-11-02 12:32:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 [2024-11-02 12:32:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:27,778 INFO L225 Difference]: With dead ends: 3588 [2024-11-02 12:32:27,778 INFO L226 Difference]: Without dead ends: 1823 [2024-11-02 12:32:27,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:27,781 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 187 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:27,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 294 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2024-11-02 12:32:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2024-11-02 12:32:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5543956043956044) internal successors, (2829), 1820 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2829 transitions. [2024-11-02 12:32:27,822 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2829 transitions. Word has length 54 [2024-11-02 12:32:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:27,822 INFO L471 AbstractCegarLoop]: Abstraction has 1821 states and 2829 transitions. [2024-11-02 12:32:27,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) [2024-11-02 12:32:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2829 transitions. [2024-11-02 12:32:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-02 12:32:27,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:27,823 INFO L215 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] [2024-11-02 12:32:27,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 12:32:27,824 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:27,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash -312065607, now seen corresponding path program 1 times [2024-11-02 12:32:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:27,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11638039] [2024-11-02 12:32:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:28,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:28,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11638039] [2024-11-02 12:32:28,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11638039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:28,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:28,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:32:28,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833209607] [2024-11-02 12:32:28,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:28,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:28,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:28,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:28,050 INFO L87 Difference]: Start difference. First operand 1821 states and 2829 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:28,212 INFO L93 Difference]: Finished difference Result 4565 states and 7090 transitions. [2024-11-02 12:32:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2024-11-02 12:32:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:28,221 INFO L225 Difference]: With dead ends: 4565 [2024-11-02 12:32:28,221 INFO L226 Difference]: Without dead ends: 2800 [2024-11-02 12:32:28,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:28,224 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 62 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:28,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 411 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2024-11-02 12:32:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2798. [2024-11-02 12:32:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.543081873435824) internal successors, (4316), 2797 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4316 transitions. [2024-11-02 12:32:28,292 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4316 transitions. Word has length 57 [2024-11-02 12:32:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:28,293 INFO L471 AbstractCegarLoop]: Abstraction has 2798 states and 4316 transitions. [2024-11-02 12:32:28,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4316 transitions. [2024-11-02 12:32:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-02 12:32:28,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:28,294 INFO L215 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] [2024-11-02 12:32:28,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 12:32:28,294 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:28,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1074181492, now seen corresponding path program 1 times [2024-11-02 12:32:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:28,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510955225] [2024-11-02 12:32:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:28,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:29,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:29,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510955225] [2024-11-02 12:32:29,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510955225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:29,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:29,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:29,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143804212] [2024-11-02 12:32:29,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:29,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:29,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:29,146 INFO L87 Difference]: Start difference. First operand 2798 states and 4316 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:29,232 INFO L93 Difference]: Finished difference Result 8145 states and 12606 transitions. [2024-11-02 12:32:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:29,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2024-11-02 12:32:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:29,250 INFO L225 Difference]: With dead ends: 8145 [2024-11-02 12:32:29,250 INFO L226 Difference]: Without dead ends: 5403 [2024-11-02 12:32:29,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:29,255 INFO L432 NwaCegarLoop]: 137 mSDtfsCounter, 343 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:29,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 239 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:32:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2024-11-02 12:32:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 5401. [2024-11-02 12:32:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5400 states have (on average 1.540925925925926) internal successors, (8321), 5400 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 8321 transitions. [2024-11-02 12:32:29,400 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 8321 transitions. Word has length 58 [2024-11-02 12:32:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:29,401 INFO L471 AbstractCegarLoop]: Abstraction has 5401 states and 8321 transitions. [2024-11-02 12:32:29,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 8321 transitions. [2024-11-02 12:32:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-02 12:32:29,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:29,405 INFO L215 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] [2024-11-02 12:32:29,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-02 12:32:29,406 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:29,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash -12364666, now seen corresponding path program 1 times [2024-11-02 12:32:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:29,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710612061] [2024-11-02 12:32:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:29,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:30,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710612061] [2024-11-02 12:32:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710612061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:30,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:30,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:30,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583221312] [2024-11-02 12:32:30,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:30,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:30,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:30,186 INFO L87 Difference]: Start difference. First operand 5401 states and 8321 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:30,338 INFO L93 Difference]: Finished difference Result 15727 states and 24278 transitions. [2024-11-02 12:32:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:30,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2024-11-02 12:32:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:30,392 INFO L225 Difference]: With dead ends: 15727 [2024-11-02 12:32:30,392 INFO L226 Difference]: Without dead ends: 10385 [2024-11-02 12:32:30,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:30,402 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 176 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:30,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 438 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2024-11-02 12:32:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 10383. [2024-11-02 12:32:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10383 states, 10382 states have (on average 1.5349643613947217) internal successors, (15936), 10382 states have internal predecessors, (15936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10383 states to 10383 states and 15936 transitions. [2024-11-02 12:32:30,636 INFO L78 Accepts]: Start accepts. Automaton has 10383 states and 15936 transitions. Word has length 61 [2024-11-02 12:32:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:30,636 INFO L471 AbstractCegarLoop]: Abstraction has 10383 states and 15936 transitions. [2024-11-02 12:32:30,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 10383 states and 15936 transitions. [2024-11-02 12:32:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-02 12:32:30,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:30,638 INFO L215 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] [2024-11-02 12:32:30,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-02 12:32:30,638 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:30,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2098372669, now seen corresponding path program 1 times [2024-11-02 12:32:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157084991] [2024-11-02 12:32:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:30,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:30,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157084991] [2024-11-02 12:32:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157084991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:30,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:30,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:30,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775473161] [2024-11-02 12:32:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:30,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:30,780 INFO L87 Difference]: Start difference. First operand 10383 states and 15936 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:30,966 INFO L93 Difference]: Finished difference Result 20732 states and 31835 transitions. [2024-11-02 12:32:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2024-11-02 12:32:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:30,991 INFO L225 Difference]: With dead ends: 20732 [2024-11-02 12:32:30,991 INFO L226 Difference]: Without dead ends: 10383 [2024-11-02 12:32:31,001 INFO L431 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 [2024-11-02 12:32:31,002 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 294 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:31,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 102 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10383 states. [2024-11-02 12:32:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10383 to 10383. [2024-11-02 12:32:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10383 states, 10382 states have (on average 1.4877672895395877) internal successors, (15446), 10382 states have internal predecessors, (15446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10383 states to 10383 states and 15446 transitions. [2024-11-02 12:32:31,222 INFO L78 Accepts]: Start accepts. Automaton has 10383 states and 15446 transitions. Word has length 64 [2024-11-02 12:32:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:31,222 INFO L471 AbstractCegarLoop]: Abstraction has 10383 states and 15446 transitions. [2024-11-02 12:32:31,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 10383 states and 15446 transitions. [2024-11-02 12:32:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-02 12:32:31,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:31,227 INFO L215 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] [2024-11-02 12:32:31,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-02 12:32:31,231 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:31,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1840633726, now seen corresponding path program 1 times [2024-11-02 12:32:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253551337] [2024-11-02 12:32:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:32,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253551337] [2024-11-02 12:32:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253551337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:32,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:32,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197534162] [2024-11-02 12:32:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:32,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:32,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:32,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:32,134 INFO L87 Difference]: Start difference. First operand 10383 states and 15446 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:32,275 INFO L93 Difference]: Finished difference Result 19233 states and 28598 transitions. [2024-11-02 12:32:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2024-11-02 12:32:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:32,307 INFO L225 Difference]: With dead ends: 19233 [2024-11-02 12:32:32,307 INFO L226 Difference]: Without dead ends: 13933 [2024-11-02 12:32:32,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:32,317 INFO L432 NwaCegarLoop]: 171 mSDtfsCounter, 154 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:32,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 440 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13933 states. [2024-11-02 12:32:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13933 to 10380. [2024-11-02 12:32:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10380 states, 10379 states have (on average 1.4878119279314) internal successors, (15442), 10379 states have internal predecessors, (15442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 15442 transitions. [2024-11-02 12:32:32,549 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 15442 transitions. Word has length 64 [2024-11-02 12:32:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:32,550 INFO L471 AbstractCegarLoop]: Abstraction has 10380 states and 15442 transitions. [2024-11-02 12:32:32,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 15442 transitions. [2024-11-02 12:32:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-02 12:32:32,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:32,551 INFO L215 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] [2024-11-02 12:32:32,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-02 12:32:32,552 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:32,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2069807552, now seen corresponding path program 1 times [2024-11-02 12:32:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:32,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339703123] [2024-11-02 12:32:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:32,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:33,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:33,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339703123] [2024-11-02 12:32:33,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339703123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:33,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:33,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931469770] [2024-11-02 12:32:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:33,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:33,490 INFO L87 Difference]: Start difference. First operand 10380 states and 15442 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:33,660 INFO L93 Difference]: Finished difference Result 25700 states and 38226 transitions. [2024-11-02 12:32:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:33,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2024-11-02 12:32:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:33,696 INFO L225 Difference]: With dead ends: 25700 [2024-11-02 12:32:33,697 INFO L226 Difference]: Without dead ends: 15394 [2024-11-02 12:32:33,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:33,710 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 146 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:33,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 460 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15394 states. [2024-11-02 12:32:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15394 to 15392. [2024-11-02 12:32:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15392 states, 15391 states have (on average 1.4767071665258917) internal successors, (22728), 15391 states have internal predecessors, (22728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15392 states to 15392 states and 22728 transitions. [2024-11-02 12:32:34,063 INFO L78 Accepts]: Start accepts. Automaton has 15392 states and 22728 transitions. Word has length 64 [2024-11-02 12:32:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:34,064 INFO L471 AbstractCegarLoop]: Abstraction has 15392 states and 22728 transitions. [2024-11-02 12:32:34,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15392 states and 22728 transitions. [2024-11-02 12:32:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-02 12:32:34,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:34,065 INFO L215 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] [2024-11-02 12:32:34,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-02 12:32:34,066 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:34,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1827601613, now seen corresponding path program 1 times [2024-11-02 12:32:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550765902] [2024-11-02 12:32:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:34,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:34,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550765902] [2024-11-02 12:32:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550765902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088170867] [2024-11-02 12:32:34,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:34,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:34,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:34,240 INFO L87 Difference]: Start difference. First operand 15392 states and 22728 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:34,501 INFO L93 Difference]: Finished difference Result 30728 states and 45388 transitions. [2024-11-02 12:32:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2024-11-02 12:32:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:34,541 INFO L225 Difference]: With dead ends: 30728 [2024-11-02 12:32:34,542 INFO L226 Difference]: Without dead ends: 15392 [2024-11-02 12:32:34,559 INFO L431 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 [2024-11-02 12:32:34,560 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 281 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:34,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 104 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15392 states. [2024-11-02 12:32:34,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15392 to 15392. [2024-11-02 12:32:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15392 states, 15391 states have (on average 1.4495484373984797) internal successors, (22310), 15391 states have internal predecessors, (22310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15392 states to 15392 states and 22310 transitions. [2024-11-02 12:32:34,870 INFO L78 Accepts]: Start accepts. Automaton has 15392 states and 22310 transitions. Word has length 64 [2024-11-02 12:32:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:34,870 INFO L471 AbstractCegarLoop]: Abstraction has 15392 states and 22310 transitions. [2024-11-02 12:32:34,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 15392 states and 22310 transitions. [2024-11-02 12:32:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-02 12:32:34,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:34,871 INFO L215 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] [2024-11-02 12:32:34,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-02 12:32:34,871 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:34,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1501913752, now seen corresponding path program 1 times [2024-11-02 12:32:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811830451] [2024-11-02 12:32:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:34,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:35,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811830451] [2024-11-02 12:32:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811830451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:35,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:35,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839698169] [2024-11-02 12:32:35,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:35,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:35,611 INFO L87 Difference]: Start difference. First operand 15392 states and 22310 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:35,799 INFO L93 Difference]: Finished difference Result 30568 states and 44216 transitions. [2024-11-02 12:32:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2024-11-02 12:32:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:35,845 INFO L225 Difference]: With dead ends: 30568 [2024-11-02 12:32:35,845 INFO L226 Difference]: Without dead ends: 22610 [2024-11-02 12:32:35,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:35,857 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 234 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:35,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 312 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22610 states. [2024-11-02 12:32:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22610 to 22608. [2024-11-02 12:32:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22608 states, 22607 states have (on average 1.4346441367717964) internal successors, (32433), 22607 states have internal predecessors, (32433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22608 states to 22608 states and 32433 transitions. [2024-11-02 12:32:36,306 INFO L78 Accepts]: Start accepts. Automaton has 22608 states and 32433 transitions. Word has length 64 [2024-11-02 12:32:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:36,306 INFO L471 AbstractCegarLoop]: Abstraction has 22608 states and 32433 transitions. [2024-11-02 12:32:36,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 22608 states and 32433 transitions. [2024-11-02 12:32:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-02 12:32:36,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:36,308 INFO L215 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] [2024-11-02 12:32:36,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-02 12:32:36,308 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:36,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 962354336, now seen corresponding path program 1 times [2024-11-02 12:32:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740002170] [2024-11-02 12:32:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:36,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740002170] [2024-11-02 12:32:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740002170] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:36,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:36,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:32:36,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962355258] [2024-11-02 12:32:36,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:36,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:32:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:32:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:36,815 INFO L87 Difference]: Start difference. First operand 22608 states and 32433 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:37,036 INFO L93 Difference]: Finished difference Result 22666 states and 32516 transitions. [2024-11-02 12:32:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:32:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2024-11-02 12:32:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:37,088 INFO L225 Difference]: With dead ends: 22666 [2024-11-02 12:32:37,088 INFO L226 Difference]: Without dead ends: 22664 [2024-11-02 12:32:37,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:32:37,095 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 45 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:37,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 502 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22664 states. [2024-11-02 12:32:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22664 to 22662. [2024-11-02 12:32:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22662 states, 22661 states have (on average 1.431225453422179) internal successors, (32433), 22661 states have internal predecessors, (32433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22662 states to 22662 states and 32433 transitions. [2024-11-02 12:32:37,676 INFO L78 Accepts]: Start accepts. Automaton has 22662 states and 32433 transitions. Word has length 67 [2024-11-02 12:32:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:37,677 INFO L471 AbstractCegarLoop]: Abstraction has 22662 states and 32433 transitions. [2024-11-02 12:32:37,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22662 states and 32433 transitions. [2024-11-02 12:32:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 12:32:37,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:37,679 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:37,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-02 12:32:37,680 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:37,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1178816852, now seen corresponding path program 1 times [2024-11-02 12:32:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486986925] [2024-11-02 12:32:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:32:38,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:38,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486986925] [2024-11-02 12:32:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486986925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:38,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:38,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:38,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885470826] [2024-11-02 12:32:38,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:38,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:32:38,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:32:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:38,765 INFO L87 Difference]: Start difference. First operand 22662 states and 32433 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:38,947 INFO L93 Difference]: Finished difference Result 37059 states and 52884 transitions. [2024-11-02 12:32:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-02 12:32:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:39,011 INFO L225 Difference]: With dead ends: 37059 [2024-11-02 12:32:39,012 INFO L226 Difference]: Without dead ends: 26729 [2024-11-02 12:32:39,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:39,025 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 270 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:39,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 221 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26729 states. [2024-11-02 12:32:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26729 to 22690. [2024-11-02 12:32:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22690 states, 22689 states have (on average 1.4309577328220724) internal successors, (32467), 22689 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22690 states to 22690 states and 32467 transitions. [2024-11-02 12:32:39,535 INFO L78 Accepts]: Start accepts. Automaton has 22690 states and 32467 transitions. Word has length 74 [2024-11-02 12:32:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:39,535 INFO L471 AbstractCegarLoop]: Abstraction has 22690 states and 32467 transitions. [2024-11-02 12:32:39,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:32:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 22690 states and 32467 transitions. [2024-11-02 12:32:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 12:32:39,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:39,539 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:39,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-02 12:32:39,539 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:39,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash 420963156, now seen corresponding path program 1 times [2024-11-02 12:32:39,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:39,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768279077] [2024-11-02 12:32:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:39,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:32:40,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:40,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768279077] [2024-11-02 12:32:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768279077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906980416] [2024-11-02 12:32:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:40,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:40,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:40,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e105c8f-0f77-4ab5-a012-cbe6844e7959/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:32:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:41,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 12:32:41,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:32:42,713 INFO L311 TraceCheckSpWp]: Computing backward predicates...