./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje --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 3f14d4f9bc9aeaf37fb25f1f86f7bc3a3a5a6ca0e3e96922bca4446f4d37ab9f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:25:34,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:25:34,331 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:25:34,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:25:34,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:25:34,369 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:25:34,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:25:34,370 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:25:34,371 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:25:34,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:25:34,376 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:25:34,376 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:25:34,377 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:25:34,377 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:25:34,378 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:25:34,380 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:25:34,381 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:25:34,381 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:25:34,381 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:25:34,382 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:25:34,386 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:25:34,387 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:25:34,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:25:34,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:25:34,388 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:25:34,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:25:34,389 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:25:34,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:25:34,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:25:34,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:25:34,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:25:34,392 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:25:34,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:25:34,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:25:34,393 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:25:34,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:25:34,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:25:34,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:25:34,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:25:34,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:25:34,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:25:34,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:25:34,397 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:25:34,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:25:34,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:25:34,397 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:25:34,398 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:25:34,398 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_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f14d4f9bc9aeaf37fb25f1f86f7bc3a3a5a6ca0e3e96922bca4446f4d37ab9f [2024-11-09 06:25:34,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:25:34,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:25:34,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:25:34,774 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:25:34,775 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:25:34,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/eca-rers2012/Problem03_label48.c Unable to find full path for "g++" [2024-11-09 06:25:37,140 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:25:37,651 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:25:37,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/sv-benchmarks/c/eca-rers2012/Problem03_label48.c [2024-11-09 06:25:37,677 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/data/88e646a30/ce54d245922c4f9bb96bd9ed6cbb27db/FLAGe47eab07d [2024-11-09 06:25:37,730 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/data/88e646a30/ce54d245922c4f9bb96bd9ed6cbb27db [2024-11-09 06:25:37,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:25:37,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:25:37,741 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:25:37,741 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:25:37,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:25:37,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:25:37" (1/1) ... [2024-11-09 06:25:37,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541bc187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:37, skipping insertion in model container [2024-11-09 06:25:37,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:25:37" (1/1) ... [2024-11-09 06:25:37,852 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:25:38,761 WARN L250 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_90fb0669-f2dc-4638-9d96-d393f7812937/sv-benchmarks/c/eca-rers2012/Problem03_label48.c[58935,58948] [2024-11-09 06:25:38,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:25:38,835 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:25:39,194 WARN L250 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_90fb0669-f2dc-4638-9d96-d393f7812937/sv-benchmarks/c/eca-rers2012/Problem03_label48.c[58935,58948] [2024-11-09 06:25:39,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:25:39,239 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:25:39,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39 WrapperNode [2024-11-09 06:25:39,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:25:39,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:25:39,242 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:25:39,242 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:25:39,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,444 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-09 06:25:39,444 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:25:39,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:25:39,445 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:25:39,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:25:39,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,479 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:25:39,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:25:39,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:25:39,607 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:25:39,608 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (1/1) ... [2024-11-09 06:25:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:25:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:39,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:25:39,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:25:39,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:25:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:25:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:25:39,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:25:39,815 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:25:39,818 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:25:42,629 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-09 06:25:42,629 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:25:43,126 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:25:43,126 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:25:43,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:25:43 BoogieIcfgContainer [2024-11-09 06:25:43,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:25:43,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:25:43,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:25:43,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:25:43,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:25:37" (1/3) ... [2024-11-09 06:25:43,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d34969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:25:43, skipping insertion in model container [2024-11-09 06:25:43,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:25:39" (2/3) ... [2024-11-09 06:25:43,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d34969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:25:43, skipping insertion in model container [2024-11-09 06:25:43,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:25:43" (3/3) ... [2024-11-09 06:25:43,143 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label48.c [2024-11-09 06:25:43,197 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:25:43,199 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:25:43,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:25:43,311 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;@1eefd95e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:25:43,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:25:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 06:25:43,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:43,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:43,342 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:43,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash 425815700, now seen corresponding path program 1 times [2024-11-09 06:25:43,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:43,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854241603] [2024-11-09 06:25:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:44,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:44,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854241603] [2024-11-09 06:25:44,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854241603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:44,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:44,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:25:44,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867518525] [2024-11-09 06:25:44,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:44,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:25:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:25:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:44,850 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:46,325 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-09 06:25:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:25:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-11-09 06:25:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:46,343 INFO L225 Difference]: With dead ends: 440 [2024-11-09 06:25:46,343 INFO L226 Difference]: Without dead ends: 289 [2024-11-09 06:25:46,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:46,352 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:46,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:25:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-09 06:25:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-09 06:25:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2024-11-09 06:25:46,439 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2024-11-09 06:25:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:46,441 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2024-11-09 06:25:46,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2024-11-09 06:25:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 06:25:46,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:46,447 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:46,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:25:46,448 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:46,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1311836339, now seen corresponding path program 1 times [2024-11-09 06:25:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159780754] [2024-11-09 06:25:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:46,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:46,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:46,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159780754] [2024-11-09 06:25:46,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159780754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:46,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:46,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:25:46,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169175414] [2024-11-09 06:25:46,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:46,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:25:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:25:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:46,901 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:48,072 INFO L93 Difference]: Finished difference Result 863 states and 1560 transitions. [2024-11-09 06:25:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:25:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2024-11-09 06:25:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:48,077 INFO L225 Difference]: With dead ends: 863 [2024-11-09 06:25:48,077 INFO L226 Difference]: Without dead ends: 575 [2024-11-09 06:25:48,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:48,081 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:48,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 22 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:25:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-09 06:25:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2024-11-09 06:25:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7682926829268293) internal successors, (1015), 574 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2024-11-09 06:25:48,122 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 151 [2024-11-09 06:25:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:48,123 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2024-11-09 06:25:48,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2024-11-09 06:25:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 06:25:48,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:48,130 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:48,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:25:48,130 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:48,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1217541057, now seen corresponding path program 1 times [2024-11-09 06:25:48,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:48,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301450714] [2024-11-09 06:25:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:48,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:48,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301450714] [2024-11-09 06:25:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301450714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:48,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:48,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:25:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244374706] [2024-11-09 06:25:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:48,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:25:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:48,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:25:48,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:48,657 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:49,751 INFO L93 Difference]: Finished difference Result 1723 states and 3043 transitions. [2024-11-09 06:25:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:25:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2024-11-09 06:25:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:49,760 INFO L225 Difference]: With dead ends: 1723 [2024-11-09 06:25:49,764 INFO L226 Difference]: Without dead ends: 1149 [2024-11-09 06:25:49,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:49,772 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 171 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:49,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 43 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:25:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2024-11-09 06:25:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2024-11-09 06:25:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6413612565445026) internal successors, (1881), 1146 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1881 transitions. [2024-11-09 06:25:49,836 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1881 transitions. Word has length 152 [2024-11-09 06:25:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:49,837 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1881 transitions. [2024-11-09 06:25:49,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1881 transitions. [2024-11-09 06:25:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-09 06:25:49,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:49,844 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:49,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:25:49,845 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:49,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:49,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1473110130, now seen corresponding path program 1 times [2024-11-09 06:25:49,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:49,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61461322] [2024-11-09 06:25:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:49,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:50,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:50,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61461322] [2024-11-09 06:25:50,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61461322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:50,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:50,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:25:50,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993002479] [2024-11-09 06:25:50,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:50,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:25:50,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:25:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:50,359 INFO L87 Difference]: Start difference. First operand 1147 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:51,574 INFO L93 Difference]: Finished difference Result 2865 states and 4676 transitions. [2024-11-09 06:25:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:25:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2024-11-09 06:25:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:51,584 INFO L225 Difference]: With dead ends: 2865 [2024-11-09 06:25:51,584 INFO L226 Difference]: Without dead ends: 1719 [2024-11-09 06:25:51,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:51,590 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:51,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 33 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:25:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2024-11-09 06:25:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2024-11-09 06:25:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5948777648428405) internal successors, (2740), 1718 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2740 transitions. [2024-11-09 06:25:51,667 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2740 transitions. Word has length 153 [2024-11-09 06:25:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:51,670 INFO L471 AbstractCegarLoop]: Abstraction has 1719 states and 2740 transitions. [2024-11-09 06:25:51,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2740 transitions. [2024-11-09 06:25:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-09 06:25:51,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:51,677 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:51,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:25:51,678 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:51,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -351773917, now seen corresponding path program 1 times [2024-11-09 06:25:51,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:51,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955283815] [2024-11-09 06:25:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:51,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:25:52,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955283815] [2024-11-09 06:25:52,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955283815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:52,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:52,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:25:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361452779] [2024-11-09 06:25:52,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:52,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:25:52,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:25:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:25:52,740 INFO L87 Difference]: Start difference. First operand 1719 states and 2740 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:54,063 INFO L93 Difference]: Finished difference Result 3719 states and 5984 transitions. [2024-11-09 06:25:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:25:54,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 158 [2024-11-09 06:25:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:54,076 INFO L225 Difference]: With dead ends: 3719 [2024-11-09 06:25:54,076 INFO L226 Difference]: Without dead ends: 1719 [2024-11-09 06:25:54,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:25:54,080 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 252 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:54,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 11 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:25:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2024-11-09 06:25:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2024-11-09 06:25:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4412107101280558) internal successors, (2476), 1718 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2476 transitions. [2024-11-09 06:25:54,143 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2476 transitions. Word has length 158 [2024-11-09 06:25:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:54,144 INFO L471 AbstractCegarLoop]: Abstraction has 1719 states and 2476 transitions. [2024-11-09 06:25:54,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2476 transitions. [2024-11-09 06:25:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-09 06:25:54,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:54,149 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:54,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:25:54,150 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:54,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:54,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1820235262, now seen corresponding path program 1 times [2024-11-09 06:25:54,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:54,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506866871] [2024-11-09 06:25:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:25:54,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506866871] [2024-11-09 06:25:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506866871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:54,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:54,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:25:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534036094] [2024-11-09 06:25:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:54,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:25:54,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:25:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:54,690 INFO L87 Difference]: Start difference. First operand 1719 states and 2476 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:55,703 INFO L93 Difference]: Finished difference Result 5153 states and 7425 transitions. [2024-11-09 06:25:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:25:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 160 [2024-11-09 06:25:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:55,721 INFO L225 Difference]: With dead ends: 5153 [2024-11-09 06:25:55,722 INFO L226 Difference]: Without dead ends: 3435 [2024-11-09 06:25:55,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:25:55,728 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 142 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:55,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 76 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:25:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2024-11-09 06:25:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2024-11-09 06:25:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.2813046010483402) internal successors, (4400), 3434 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4400 transitions. [2024-11-09 06:25:55,839 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4400 transitions. Word has length 160 [2024-11-09 06:25:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:55,840 INFO L471 AbstractCegarLoop]: Abstraction has 3435 states and 4400 transitions. [2024-11-09 06:25:55,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4400 transitions. [2024-11-09 06:25:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-09 06:25:55,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:55,847 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:55,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:25:55,848 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:55,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -776311384, now seen corresponding path program 1 times [2024-11-09 06:25:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:55,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322618250] [2024-11-09 06:25:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:56,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:56,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322618250] [2024-11-09 06:25:56,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322618250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:56,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:25:56,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:25:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827395121] [2024-11-09 06:25:56,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:56,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:25:56,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:25:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:25:56,708 INFO L87 Difference]: Start difference. First operand 3435 states and 4400 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:58,384 INFO L93 Difference]: Finished difference Result 7868 states and 10135 transitions. [2024-11-09 06:25:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:25:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2024-11-09 06:25:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:58,404 INFO L225 Difference]: With dead ends: 7868 [2024-11-09 06:25:58,404 INFO L226 Difference]: Without dead ends: 4293 [2024-11-09 06:25:58,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:25:58,410 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 122 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:58,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 62 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 06:25:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2024-11-09 06:25:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2024-11-09 06:25:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.283550792171482) internal successors, (5509), 4292 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5509 transitions. [2024-11-09 06:25:58,581 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5509 transitions. Word has length 174 [2024-11-09 06:25:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:58,582 INFO L471 AbstractCegarLoop]: Abstraction has 4293 states and 5509 transitions. [2024-11-09 06:25:58,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:25:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5509 transitions. [2024-11-09 06:25:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-09 06:25:58,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:58,595 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:58,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:25:58,596 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:25:58,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1937071416, now seen corresponding path program 1 times [2024-11-09 06:25:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:58,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075442994] [2024-11-09 06:25:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:59,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075442994] [2024-11-09 06:25:59,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075442994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635214717] [2024-11-09 06:25:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:59,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:59,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:59,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:59,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:25:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:59,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:25:59,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:25:59,869 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:25:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635214717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:25:59,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:25:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:25:59,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237100538] [2024-11-09 06:25:59,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:25:59,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:25:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:25:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:25:59,873 INFO L87 Difference]: Start difference. First operand 4293 states and 5509 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:00,749 INFO L93 Difference]: Finished difference Result 9157 states and 11863 transitions. [2024-11-09 06:26:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:00,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2024-11-09 06:26:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:00,768 INFO L225 Difference]: With dead ends: 9157 [2024-11-09 06:26:00,769 INFO L226 Difference]: Without dead ends: 4865 [2024-11-09 06:26:00,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:00,775 INFO L432 NwaCegarLoop]: 196 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:00,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 200 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:26:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2024-11-09 06:26:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4865. [2024-11-09 06:26:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.2939967105263157) internal successors, (6294), 4864 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 6294 transitions. [2024-11-09 06:26:00,915 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 6294 transitions. Word has length 181 [2024-11-09 06:26:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:00,916 INFO L471 AbstractCegarLoop]: Abstraction has 4865 states and 6294 transitions. [2024-11-09 06:26:00,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 6294 transitions. [2024-11-09 06:26:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-09 06:26:00,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:00,937 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:00,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:01,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:01,139 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:01,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1658232452, now seen corresponding path program 1 times [2024-11-09 06:26:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:01,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977450267] [2024-11-09 06:26:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:26:01,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977450267] [2024-11-09 06:26:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977450267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534037591] [2024-11-09 06:26:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:01,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:01,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:26:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:02,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:26:02,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:26:02,366 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534037591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:02,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:26:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294169382] [2024-11-09 06:26:02,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:02,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:02,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:02,369 INFO L87 Difference]: Start difference. First operand 4865 states and 6294 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:03,307 INFO L93 Difference]: Finished difference Result 12589 states and 16663 transitions. [2024-11-09 06:26:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:03,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 187 [2024-11-09 06:26:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:03,341 INFO L225 Difference]: With dead ends: 12589 [2024-11-09 06:26:03,342 INFO L226 Difference]: Without dead ends: 7725 [2024-11-09 06:26:03,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:03,352 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:03,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 223 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:26:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2024-11-09 06:26:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 7439. [2024-11-09 06:26:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 1.2264049475665502) internal successors, (9122), 7438 states have internal predecessors, (9122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 9122 transitions. [2024-11-09 06:26:03,562 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 9122 transitions. Word has length 187 [2024-11-09 06:26:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:03,563 INFO L471 AbstractCegarLoop]: Abstraction has 7439 states and 9122 transitions. [2024-11-09 06:26:03,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 9122 transitions. [2024-11-09 06:26:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-09 06:26:03,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:03,577 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:03,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:26:03,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:03,778 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:03,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1978039082, now seen corresponding path program 1 times [2024-11-09 06:26:03,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:03,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102362714] [2024-11-09 06:26:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:03,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:04,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102362714] [2024-11-09 06:26:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102362714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:04,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:26:04,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:26:04,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559106317] [2024-11-09 06:26:04,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:04,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:04,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:26:04,603 INFO L87 Difference]: Start difference. First operand 7439 states and 9122 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:05,496 INFO L93 Difference]: Finished difference Result 16021 states and 19549 transitions. [2024-11-09 06:26:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2024-11-09 06:26:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:05,522 INFO L225 Difference]: With dead ends: 16021 [2024-11-09 06:26:05,522 INFO L226 Difference]: Without dead ends: 8583 [2024-11-09 06:26:05,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:26:05,532 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:05,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 52 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:26:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2024-11-09 06:26:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 8583. [2024-11-09 06:26:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.2130039617804707) internal successors, (10410), 8582 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 10410 transitions. [2024-11-09 06:26:05,866 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 10410 transitions. Word has length 206 [2024-11-09 06:26:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:05,867 INFO L471 AbstractCegarLoop]: Abstraction has 8583 states and 10410 transitions. [2024-11-09 06:26:05,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 10410 transitions. [2024-11-09 06:26:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2024-11-09 06:26:05,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:05,887 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:05,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 06:26:05,887 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:05,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash -511759686, now seen corresponding path program 1 times [2024-11-09 06:26:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:05,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953524750] [2024-11-09 06:26:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:06,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:06,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953524750] [2024-11-09 06:26:06,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953524750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:06,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:26:06,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:26:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648287933] [2024-11-09 06:26:06,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:06,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:26:06,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:26:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:26:06,918 INFO L87 Difference]: Start difference. First operand 8583 states and 10410 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:08,338 INFO L93 Difference]: Finished difference Result 19739 states and 23991 transitions. [2024-11-09 06:26:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:26:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2024-11-09 06:26:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:08,362 INFO L225 Difference]: With dead ends: 19739 [2024-11-09 06:26:08,362 INFO L226 Difference]: Without dead ends: 11157 [2024-11-09 06:26:08,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:26:08,373 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 303 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:08,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 81 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:26:08,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2024-11-09 06:26:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11157. [2024-11-09 06:26:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11157 states, 11156 states have (on average 1.1907493725349587) internal successors, (13284), 11156 states have internal predecessors, (13284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11157 states to 11157 states and 13284 transitions. [2024-11-09 06:26:08,595 INFO L78 Accepts]: Start accepts. Automaton has 11157 states and 13284 transitions. Word has length 213 [2024-11-09 06:26:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:08,596 INFO L471 AbstractCegarLoop]: Abstraction has 11157 states and 13284 transitions. [2024-11-09 06:26:08,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 11157 states and 13284 transitions. [2024-11-09 06:26:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-09 06:26:08,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:08,614 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:08,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:26:08,615 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:08,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash -881136313, now seen corresponding path program 1 times [2024-11-09 06:26:08,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:08,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660879534] [2024-11-09 06:26:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:08,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 06:26:09,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:09,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660879534] [2024-11-09 06:26:09,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660879534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:09,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589035677] [2024-11-09 06:26:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:09,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:09,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:09,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:26:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:09,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:26:09,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:26:09,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589035677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:09,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:26:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996675739] [2024-11-09 06:26:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:09,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:09,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:09,854 INFO L87 Difference]: Start difference. First operand 11157 states and 13284 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:10,796 INFO L93 Difference]: Finished difference Result 31179 states and 37097 transitions. [2024-11-09 06:26:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 231 [2024-11-09 06:26:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:10,840 INFO L225 Difference]: With dead ends: 31179 [2024-11-09 06:26:10,840 INFO L226 Difference]: Without dead ends: 20309 [2024-11-09 06:26:10,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:10,855 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:10,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 80 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:26:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20309 states. [2024-11-09 06:26:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20309 to 19737. [2024-11-09 06:26:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 19736 states have (on average 1.1713113092825294) internal successors, (23117), 19736 states have internal predecessors, (23117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 23117 transitions. [2024-11-09 06:26:11,321 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 23117 transitions. Word has length 231 [2024-11-09 06:26:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:11,322 INFO L471 AbstractCegarLoop]: Abstraction has 19737 states and 23117 transitions. [2024-11-09 06:26:11,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 23117 transitions. [2024-11-09 06:26:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2024-11-09 06:26:11,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:11,351 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:11,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:26:11,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:26:11,552 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:11,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -731029847, now seen corresponding path program 1 times [2024-11-09 06:26:11,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:11,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846400882] [2024-11-09 06:26:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:14,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846400882] [2024-11-09 06:26:14,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846400882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696138201] [2024-11-09 06:26:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:14,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:14,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:14,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:26:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:14,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:26:14,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:14,721 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:14,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696138201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:14,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:14,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:26:14,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112403875] [2024-11-09 06:26:14,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:14,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:14,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:26:14,727 INFO L87 Difference]: Start difference. First operand 19737 states and 23117 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:15,597 INFO L93 Difference]: Finished difference Result 42333 states and 50302 transitions. [2024-11-09 06:26:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:15,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 239 [2024-11-09 06:26:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:15,639 INFO L225 Difference]: With dead ends: 42333 [2024-11-09 06:26:15,639 INFO L226 Difference]: Without dead ends: 22883 [2024-11-09 06:26:15,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:26:15,661 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:15,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 179 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:26:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22883 states. [2024-11-09 06:26:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22883 to 22597. [2024-11-09 06:26:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22597 states, 22596 states have (on average 1.187953620109754) internal successors, (26843), 22596 states have internal predecessors, (26843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22597 states to 22597 states and 26843 transitions. [2024-11-09 06:26:16,060 INFO L78 Accepts]: Start accepts. Automaton has 22597 states and 26843 transitions. Word has length 239 [2024-11-09 06:26:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:16,061 INFO L471 AbstractCegarLoop]: Abstraction has 22597 states and 26843 transitions. [2024-11-09 06:26:16,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 22597 states and 26843 transitions. [2024-11-09 06:26:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-09 06:26:16,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:16,086 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:16,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:16,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:26:16,288 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:16,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -7379837, now seen corresponding path program 1 times [2024-11-09 06:26:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:16,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267796941] [2024-11-09 06:26:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:16,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 06:26:16,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:16,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267796941] [2024-11-09 06:26:16,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267796941] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:16,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:26:16,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:26:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435948687] [2024-11-09 06:26:16,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:16,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:26:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:16,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:26:16,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:26:16,771 INFO L87 Difference]: Start difference. First operand 22597 states and 26843 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:18,194 INFO L93 Difference]: Finished difference Result 73652 states and 87155 transitions. [2024-11-09 06:26:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:26:18,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 247 [2024-11-09 06:26:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:18,268 INFO L225 Difference]: With dead ends: 73652 [2024-11-09 06:26:18,268 INFO L226 Difference]: Without dead ends: 51342 [2024-11-09 06:26:18,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:26:18,291 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 321 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:18,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 197 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:26:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51342 states. [2024-11-09 06:26:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51342 to 45763. [2024-11-09 06:26:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45763 states, 45762 states have (on average 1.1797779817315677) internal successors, (53989), 45762 states have internal predecessors, (53989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45763 states to 45763 states and 53989 transitions. [2024-11-09 06:26:19,216 INFO L78 Accepts]: Start accepts. Automaton has 45763 states and 53989 transitions. Word has length 247 [2024-11-09 06:26:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:19,217 INFO L471 AbstractCegarLoop]: Abstraction has 45763 states and 53989 transitions. [2024-11-09 06:26:19,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 45763 states and 53989 transitions. [2024-11-09 06:26:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2024-11-09 06:26:19,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:19,254 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:19,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 06:26:19,254 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:19,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -415463746, now seen corresponding path program 1 times [2024-11-09 06:26:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902792900] [2024-11-09 06:26:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 06:26:20,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902792900] [2024-11-09 06:26:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902792900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:20,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:26:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:26:20,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847874318] [2024-11-09 06:26:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:20,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:20,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:26:20,408 INFO L87 Difference]: Start difference. First operand 45763 states and 53989 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:21,542 INFO L93 Difference]: Finished difference Result 91668 states and 108130 transitions. [2024-11-09 06:26:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 280 [2024-11-09 06:26:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:21,603 INFO L225 Difference]: With dead ends: 91668 [2024-11-09 06:26:21,603 INFO L226 Difference]: Without dead ends: 46192 [2024-11-09 06:26:21,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:26:21,647 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:21,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 83 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:26:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46192 states. [2024-11-09 06:26:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46192 to 46192. [2024-11-09 06:26:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46192 states, 46191 states have (on average 1.1785845727522677) internal successors, (54440), 46191 states have internal predecessors, (54440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46192 states to 46192 states and 54440 transitions. [2024-11-09 06:26:22,786 INFO L78 Accepts]: Start accepts. Automaton has 46192 states and 54440 transitions. Word has length 280 [2024-11-09 06:26:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:22,787 INFO L471 AbstractCegarLoop]: Abstraction has 46192 states and 54440 transitions. [2024-11-09 06:26:22,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 46192 states and 54440 transitions. [2024-11-09 06:26:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2024-11-09 06:26:22,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:22,829 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:22,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 06:26:22,829 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:22,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1065639924, now seen corresponding path program 1 times [2024-11-09 06:26:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:22,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211582549] [2024-11-09 06:26:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:22,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:23,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:23,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211582549] [2024-11-09 06:26:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211582549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102015151] [2024-11-09 06:26:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:23,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:23,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:26:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:24,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:26:24,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:24,162 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:24,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102015151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:24,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:24,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:26:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418334296] [2024-11-09 06:26:24,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:24,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:24,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:24,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:24,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:24,169 INFO L87 Difference]: Start difference. First operand 46192 states and 54440 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:25,527 INFO L93 Difference]: Finished difference Result 97102 states and 114724 transitions. [2024-11-09 06:26:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 281 [2024-11-09 06:26:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:25,617 INFO L225 Difference]: With dead ends: 97102 [2024-11-09 06:26:25,617 INFO L226 Difference]: Without dead ends: 51626 [2024-11-09 06:26:25,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:25,647 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 129 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:25,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 183 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:26:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51626 states. [2024-11-09 06:26:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51626 to 51626. [2024-11-09 06:26:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51626 states, 51625 states have (on average 1.1725326876513318) internal successors, (60532), 51625 states have internal predecessors, (60532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51626 states to 51626 states and 60532 transitions. [2024-11-09 06:26:26,822 INFO L78 Accepts]: Start accepts. Automaton has 51626 states and 60532 transitions. Word has length 281 [2024-11-09 06:26:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:26,823 INFO L471 AbstractCegarLoop]: Abstraction has 51626 states and 60532 transitions. [2024-11-09 06:26:26,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 51626 states and 60532 transitions. [2024-11-09 06:26:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2024-11-09 06:26:26,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:26,880 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:26,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:26:27,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:26:27,081 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:27,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1446473612, now seen corresponding path program 1 times [2024-11-09 06:26:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:27,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738714373] [2024-11-09 06:26:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:26:27,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:27,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738714373] [2024-11-09 06:26:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738714373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:27,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450102482] [2024-11-09 06:26:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:27,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:27,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:27,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:27,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:26:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:28,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:26:28,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-11-09 06:26:28,416 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:28,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450102482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:28,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:28,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:26:28,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926708229] [2024-11-09 06:26:28,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:28,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:26:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:26:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:28,420 INFO L87 Difference]: Start difference. First operand 51626 states and 60532 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:29,710 INFO L93 Difference]: Finished difference Result 119267 states and 140042 transitions. [2024-11-09 06:26:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:26:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 282 [2024-11-09 06:26:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:29,805 INFO L225 Difference]: With dead ends: 119267 [2024-11-09 06:26:29,805 INFO L226 Difference]: Without dead ends: 68357 [2024-11-09 06:26:29,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:29,845 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:29,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 236 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:26:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68357 states. [2024-11-09 06:26:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68357 to 65497. [2024-11-09 06:26:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65497 states, 65496 states have (on average 1.1668040796384511) internal successors, (76421), 65496 states have internal predecessors, (76421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65497 states to 65497 states and 76421 transitions. [2024-11-09 06:26:31,425 INFO L78 Accepts]: Start accepts. Automaton has 65497 states and 76421 transitions. Word has length 282 [2024-11-09 06:26:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:31,426 INFO L471 AbstractCegarLoop]: Abstraction has 65497 states and 76421 transitions. [2024-11-09 06:26:31,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 65497 states and 76421 transitions. [2024-11-09 06:26:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2024-11-09 06:26:31,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:31,478 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:31,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:31,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:26:31,679 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:31,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1049213394, now seen corresponding path program 1 times [2024-11-09 06:26:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:31,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384571255] [2024-11-09 06:26:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:31,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-09 06:26:32,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:32,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384571255] [2024-11-09 06:26:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384571255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:32,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718405618] [2024-11-09 06:26:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:32,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:32,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:32,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:26:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:32,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:26:32,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-09 06:26:33,085 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718405618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:33,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:33,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:26:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796273850] [2024-11-09 06:26:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:33,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:26:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:26:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:26:33,088 INFO L87 Difference]: Start difference. First operand 65497 states and 76421 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:35,449 INFO L93 Difference]: Finished difference Result 207929 states and 242393 transitions. [2024-11-09 06:26:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:26:35,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 302 [2024-11-09 06:26:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:35,699 INFO L225 Difference]: With dead ends: 207929 [2024-11-09 06:26:35,699 INFO L226 Difference]: Without dead ends: 143148 [2024-11-09 06:26:35,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:26:35,763 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 481 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:35,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 188 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:26:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143148 states. [2024-11-09 06:26:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143148 to 128131. [2024-11-09 06:26:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128131 states, 128130 states have (on average 1.1607351908218215) internal successors, (148725), 128130 states have internal predecessors, (148725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128131 states to 128131 states and 148725 transitions. [2024-11-09 06:26:38,911 INFO L78 Accepts]: Start accepts. Automaton has 128131 states and 148725 transitions. Word has length 302 [2024-11-09 06:26:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:38,911 INFO L471 AbstractCegarLoop]: Abstraction has 128131 states and 148725 transitions. [2024-11-09 06:26:38,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:26:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 128131 states and 148725 transitions. [2024-11-09 06:26:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2024-11-09 06:26:38,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:38,961 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:38,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:26:39,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:26:39,163 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:39,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash 832378080, now seen corresponding path program 1 times [2024-11-09 06:26:39,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:39,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401195710] [2024-11-09 06:26:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-09 06:26:40,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:40,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401195710] [2024-11-09 06:26:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401195710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:40,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189460536] [2024-11-09 06:26:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:40,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:40,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:40,143 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:40,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb0669-f2dc-4638-9d96-d393f7812937/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:26:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:40,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:26:40,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 06:26:40,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 06:26:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189460536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537110735] [2024-11-09 06:26:41,637 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-09 06:26:41,637 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:41,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:41,653 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:41,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:14,970 WARN L286 SmtUtils]: Spent 15.03s on a formula simplification that was a NOOP. DAG size: 868 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-09 06:27:30,079 WARN L286 SmtUtils]: Spent 15.10s on a formula simplification that was a NOOP. DAG size: 868 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)