./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:33:35,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:33:36,070 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:33:36,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:33:36,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:33:36,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:33:36,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:33:36,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:33:36,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:33:36,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:33:36,132 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:33:36,133 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:33:36,133 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:33:36,135 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:33:36,136 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:33:36,136 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:33:36,136 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:33:36,137 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:33:36,137 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:33:36,138 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:33:36,138 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:33:36,139 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:33:36,140 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:33:36,140 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:33:36,141 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:33:36,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:33:36,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:33:36,142 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:33:36,143 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:33:36,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:33:36,143 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:33:36,144 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:33:36,144 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:33:36,145 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:33:36,145 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:33:36,145 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:33:36,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:36,146 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:33:36,146 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:33:36,146 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:33:36,147 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:33:36,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:33:36,147 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:33:36,147 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:33:36,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:33:36,148 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_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 [2023-11-06 20:33:36,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:33:36,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:33:36,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:33:36,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:33:36,544 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:33:36,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/locks/test_locks_9.c [2023-11-06 20:33:39,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:33:39,888 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:33:39,888 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/sv-benchmarks/c/locks/test_locks_9.c [2023-11-06 20:33:39,909 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/data/2c3cdb59b/f7525913063b4022ab4a113648cd4b04/FLAG98ca72748 [2023-11-06 20:33:39,926 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/data/2c3cdb59b/f7525913063b4022ab4a113648cd4b04 [2023-11-06 20:33:39,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:33:39,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:33:39,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:39,938 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:33:39,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:33:39,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:39" (1/1) ... [2023-11-06 20:33:39,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728a6602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:39, skipping insertion in model container [2023-11-06 20:33:39,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:39" (1/1) ... [2023-11-06 20:33:39,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:33:40,199 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2023-11-06 20:33:40,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:40,215 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:33:40,260 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2023-11-06 20:33:40,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:40,278 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:33:40,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40 WrapperNode [2023-11-06 20:33:40,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:40,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:33:40,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:33:40,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:33:40,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,306 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,328 INFO L138 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 136 [2023-11-06 20:33:40,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:33:40,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:33:40,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:33:40,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:33:40,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:33:40,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:33:40,368 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:33:40,368 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:33:40,369 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (1/1) ... [2023-11-06 20:33:40,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:40,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:33:40,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:33:40,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:33:40,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:33:40,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:33:40,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:33:40,541 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:33:40,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:33:40,846 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:33:40,998 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:33:40,998 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 20:33:41,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:33:41 BoogieIcfgContainer [2023-11-06 20:33:41,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:33:41,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:33:41,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:33:41,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:33:41,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:33:39" (1/3) ... [2023-11-06 20:33:41,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49393c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:33:41, skipping insertion in model container [2023-11-06 20:33:41,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:40" (2/3) ... [2023-11-06 20:33:41,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49393c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:33:41, skipping insertion in model container [2023-11-06 20:33:41,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:33:41" (3/3) ... [2023-11-06 20:33:41,017 INFO L112 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2023-11-06 20:33:41,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:33:41,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:33:41,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:33:41,115 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@950a718, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:33:41,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:33:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:33:41,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:41,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:33:41,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:41,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:41,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1761973180, now seen corresponding path program 1 times [2023-11-06 20:33:41,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:41,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94547965] [2023-11-06 20:33:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:41,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:41,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94547965] [2023-11-06 20:33:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94547965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:41,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:41,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375540020] [2023-11-06 20:33:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:41,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:41,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:41,474 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:41,533 INFO L93 Difference]: Finished difference Result 53 states and 89 transitions. [2023-11-06 20:33:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:41,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-06 20:33:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:41,547 INFO L225 Difference]: With dead ends: 53 [2023-11-06 20:33:41,547 INFO L226 Difference]: Without dead ends: 43 [2023-11-06 20:33:41,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:41,554 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:41,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-06 20:33:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2023-11-06 20:33:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 39 transitions. [2023-11-06 20:33:41,591 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 39 transitions. Word has length 6 [2023-11-06 20:33:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:41,592 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 39 transitions. [2023-11-06 20:33:41,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 39 transitions. [2023-11-06 20:33:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:33:41,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:41,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:41,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:33:41,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:41,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1213192596, now seen corresponding path program 1 times [2023-11-06 20:33:41,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:41,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277007039] [2023-11-06 20:33:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:41,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277007039] [2023-11-06 20:33:41,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277007039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:41,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:41,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825290790] [2023-11-06 20:33:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:41,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:41,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:41,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:41,726 INFO L87 Difference]: Start difference. First operand 23 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:41,753 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2023-11-06 20:33:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-06 20:33:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:41,755 INFO L225 Difference]: With dead ends: 43 [2023-11-06 20:33:41,755 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 20:33:41,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:41,758 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:41,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 20:33:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2023-11-06 20:33:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2023-11-06 20:33:41,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 7 [2023-11-06 20:33:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:41,766 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2023-11-06 20:33:41,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2023-11-06 20:33:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:33:41,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:41,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:33:41,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:41,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1045949201, now seen corresponding path program 1 times [2023-11-06 20:33:41,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:41,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417825842] [2023-11-06 20:33:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:41,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:41,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417825842] [2023-11-06 20:33:41,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417825842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:41,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:41,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:41,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810107545] [2023-11-06 20:33:41,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:41,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:41,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:41,909 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:41,935 INFO L93 Difference]: Finished difference Result 41 states and 66 transitions. [2023-11-06 20:33:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-06 20:33:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:41,938 INFO L225 Difference]: With dead ends: 41 [2023-11-06 20:33:41,938 INFO L226 Difference]: Without dead ends: 39 [2023-11-06 20:33:41,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:41,940 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:41,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 91 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-06 20:33:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2023-11-06 20:33:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 37 transitions. [2023-11-06 20:33:41,951 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 37 transitions. Word has length 8 [2023-11-06 20:33:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:41,952 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 37 transitions. [2023-11-06 20:33:41,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 37 transitions. [2023-11-06 20:33:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:33:41,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:41,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:41,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:33:41,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:41,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:41,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1935098783, now seen corresponding path program 1 times [2023-11-06 20:33:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:41,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757486479] [2023-11-06 20:33:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:41,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:42,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:42,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757486479] [2023-11-06 20:33:42,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757486479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:42,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:42,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:42,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567387322] [2023-11-06 20:33:42,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:42,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:42,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,058 INFO L87 Difference]: Start difference. First operand 23 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:42,094 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2023-11-06 20:33:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-06 20:33:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:42,096 INFO L225 Difference]: With dead ends: 39 [2023-11-06 20:33:42,096 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 20:33:42,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,098 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:42,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 20:33:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2023-11-06 20:33:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 36 transitions. [2023-11-06 20:33:42,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 36 transitions. Word has length 9 [2023-11-06 20:33:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:42,105 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 36 transitions. [2023-11-06 20:33:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 36 transitions. [2023-11-06 20:33:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:33:42,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:42,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:33:42,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:42,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash 141694566, now seen corresponding path program 1 times [2023-11-06 20:33:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:42,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952393850] [2023-11-06 20:33:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:42,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:42,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952393850] [2023-11-06 20:33:42,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952393850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:42,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:42,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610479836] [2023-11-06 20:33:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,166 INFO L87 Difference]: Start difference. First operand 23 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:42,186 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2023-11-06 20:33:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-06 20:33:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:42,202 INFO L225 Difference]: With dead ends: 37 [2023-11-06 20:33:42,202 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 20:33:42,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,204 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:42,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 80 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 20:33:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2023-11-06 20:33:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2023-11-06 20:33:42,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 35 transitions. Word has length 10 [2023-11-06 20:33:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:42,210 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 35 transitions. [2023-11-06 20:33:42,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 35 transitions. [2023-11-06 20:33:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:33:42,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:42,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:33:42,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:42,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 97779286, now seen corresponding path program 1 times [2023-11-06 20:33:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:42,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565053493] [2023-11-06 20:33:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:42,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:42,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565053493] [2023-11-06 20:33:42,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565053493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:42,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:42,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548886900] [2023-11-06 20:33:42,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:42,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:42,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,341 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:42,359 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2023-11-06 20:33:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-06 20:33:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:42,366 INFO L225 Difference]: With dead ends: 35 [2023-11-06 20:33:42,366 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 20:33:42,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,367 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:42,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 20:33:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2023-11-06 20:33:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2023-11-06 20:33:42,373 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 11 [2023-11-06 20:33:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:42,373 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2023-11-06 20:33:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2023-11-06 20:33:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:33:42,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:42,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:42,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:33:42,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:42,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:42,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1263594053, now seen corresponding path program 1 times [2023-11-06 20:33:42,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:42,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244409530] [2023-11-06 20:33:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:42,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244409530] [2023-11-06 20:33:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244409530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:42,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:42,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:42,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828910302] [2023-11-06 20:33:42,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:42,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,427 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:42,445 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2023-11-06 20:33:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-11-06 20:33:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:42,446 INFO L225 Difference]: With dead ends: 33 [2023-11-06 20:33:42,446 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 20:33:42,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,448 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:42,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 20:33:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-11-06 20:33:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2023-11-06 20:33:42,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2023-11-06 20:33:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:42,453 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2023-11-06 20:33:42,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2023-11-06 20:33:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:33:42,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:42,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:33:42,455 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:42,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash -516494261, now seen corresponding path program 1 times [2023-11-06 20:33:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:42,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195043417] [2023-11-06 20:33:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:42,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195043417] [2023-11-06 20:33:42,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195043417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:42,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:42,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334076425] [2023-11-06 20:33:42,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:42,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,507 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:42,524 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2023-11-06 20:33:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-06 20:33:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:42,526 INFO L225 Difference]: With dead ends: 31 [2023-11-06 20:33:42,526 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 20:33:42,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,528 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:42,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 61 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 20:33:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2023-11-06 20:33:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-11-06 20:33:42,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2023-11-06 20:33:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:42,537 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-11-06 20:33:42,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-11-06 20:33:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:33:42,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:42,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:42,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:33:42,539 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:42,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1168763152, now seen corresponding path program 1 times [2023-11-06 20:33:42,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:42,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928622037] [2023-11-06 20:33:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:42,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:42,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928622037] [2023-11-06 20:33:42,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928622037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:42,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:42,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139904306] [2023-11-06 20:33:42,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,625 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:42,645 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2023-11-06 20:33:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-06 20:33:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:42,647 INFO L225 Difference]: With dead ends: 25 [2023-11-06 20:33:42,647 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 20:33:42,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:42,648 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:42,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 52 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:33:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 20:33:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 20:33:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 20:33:42,650 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2023-11-06 20:33:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:42,651 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 20:33:42,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 20:33:42,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 20:33:42,654 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 20:33:42,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:33:42,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-06 20:33:42,670 INFO L899 garLoopResultBuilder]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,670 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 6 151) the Hoare annotation is: true [2023-11-06 20:33:42,671 INFO L899 garLoopResultBuilder]: For program point L102(line 102) no Hoare annotation was computed. [2023-11-06 20:33:42,671 INFO L899 garLoopResultBuilder]: For program point L127(line 127) no Hoare annotation was computed. [2023-11-06 20:33:42,671 INFO L899 garLoopResultBuilder]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,671 INFO L899 garLoopResultBuilder]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,671 INFO L899 garLoopResultBuilder]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,672 INFO L899 garLoopResultBuilder]: For program point L112(line 112) no Hoare annotation was computed. [2023-11-06 20:33:42,672 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-06 20:33:42,672 INFO L899 garLoopResultBuilder]: For program point L137(line 137) no Hoare annotation was computed. [2023-11-06 20:33:42,672 INFO L899 garLoopResultBuilder]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,672 INFO L899 garLoopResultBuilder]: For program point L122(line 122) no Hoare annotation was computed. [2023-11-06 20:33:42,673 INFO L902 garLoopResultBuilder]: At program point L147(lines 7 151) the Hoare annotation is: true [2023-11-06 20:33:42,673 INFO L899 garLoopResultBuilder]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,673 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-11-06 20:33:42,673 INFO L899 garLoopResultBuilder]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,673 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2023-11-06 20:33:42,673 INFO L899 garLoopResultBuilder]: For program point L107(line 107) no Hoare annotation was computed. [2023-11-06 20:33:42,674 INFO L899 garLoopResultBuilder]: For program point L132(line 132) no Hoare annotation was computed. [2023-11-06 20:33:42,674 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-06 20:33:42,674 INFO L899 garLoopResultBuilder]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,674 INFO L902 garLoopResultBuilder]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2023-11-06 20:33:42,674 INFO L895 garLoopResultBuilder]: At program point main_ERROR#1(lines 7 151) the Hoare annotation is: false [2023-11-06 20:33:42,675 INFO L899 garLoopResultBuilder]: For program point L117(line 117) no Hoare annotation was computed. [2023-11-06 20:33:42,675 INFO L899 garLoopResultBuilder]: For program point L142(line 142) no Hoare annotation was computed. [2023-11-06 20:33:42,675 INFO L899 garLoopResultBuilder]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2023-11-06 20:33:42,678 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:42,681 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 20:33:42,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 08:33:42 BoogieIcfgContainer [2023-11-06 20:33:42,690 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 20:33:42,691 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 20:33:42,691 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 20:33:42,691 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 20:33:42,692 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:33:41" (3/4) ... [2023-11-06 20:33:42,694 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 20:33:42,708 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-06 20:33:42,708 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-06 20:33:42,709 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 20:33:42,709 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 20:33:42,780 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 20:33:42,780 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/witness.graphml.yaml [2023-11-06 20:33:42,781 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 20:33:42,781 INFO L158 Benchmark]: Toolchain (without parser) took 2851.24ms. Allocated memory was 138.4MB in the beginning and 186.6MB in the end (delta: 48.2MB). Free memory was 92.4MB in the beginning and 107.8MB in the end (delta: -15.4MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,782 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 138.4MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 20:33:42,782 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.03ms. Allocated memory is still 138.4MB. Free memory was 92.0MB in the beginning and 81.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,783 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.14ms. Allocated memory is still 138.4MB. Free memory was 81.0MB in the beginning and 79.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,783 INFO L158 Benchmark]: Boogie Preprocessor took 37.47ms. Allocated memory is still 138.4MB. Free memory was 79.2MB in the beginning and 77.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,784 INFO L158 Benchmark]: RCFGBuilder took 633.29ms. Allocated memory was 138.4MB in the beginning and 186.6MB in the end (delta: 48.2MB). Free memory was 77.8MB in the beginning and 156.6MB in the end (delta: -78.8MB). Peak memory consumption was 24.0MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,784 INFO L158 Benchmark]: TraceAbstraction took 1686.44ms. Allocated memory is still 186.6MB. Free memory was 155.7MB in the beginning and 112.0MB in the end (delta: 43.8MB). Peak memory consumption was 42.4MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,785 INFO L158 Benchmark]: Witness Printer took 89.88ms. Allocated memory is still 186.6MB. Free memory was 112.0MB in the beginning and 107.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 20:33:42,787 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 138.4MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.03ms. Allocated memory is still 138.4MB. Free memory was 92.0MB in the beginning and 81.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.14ms. Allocated memory is still 138.4MB. Free memory was 81.0MB in the beginning and 79.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.47ms. Allocated memory is still 138.4MB. Free memory was 79.2MB in the beginning and 77.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 633.29ms. Allocated memory was 138.4MB in the beginning and 186.6MB in the end (delta: 48.2MB). Free memory was 77.8MB in the beginning and 156.6MB in the end (delta: -78.8MB). Peak memory consumption was 24.0MB. Max. memory is 16.1GB. * TraceAbstraction took 1686.44ms. Allocated memory is still 186.6MB. Free memory was 155.7MB in the beginning and 112.0MB in the end (delta: 43.8MB). Peak memory consumption was 42.4MB. Max. memory is 16.1GB. * Witness Printer took 89.88ms. Allocated memory is still 186.6MB. Free memory was 112.0MB in the beginning and 107.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 149]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 244 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 244 mSDsluCounter, 721 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 439 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 111 IncrementalHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 282 mSDtfsCounter, 111 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 104 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 369 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-11-06 20:33:42,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e342cbc4-be1e-4c53-9941-a7080347a3a5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE