./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2539530bc7d482c73cf7743c3e3167fff4f274988d9be6836a02ba65f37bdc1a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:33,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:33,557 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:57:33,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:33,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:33,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:33,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:33,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:33,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:57:33,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:57:33,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:33,619 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:33,620 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:33,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:33,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:57:33,622 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:33,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:33,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:33,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:33,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:57:33,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:57:33,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:57:33,626 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:33,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:57:33,627 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:33,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:33,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:33,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:57:33,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:33,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:33,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:57:33,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:57:33,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:57:33,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:57:33,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:57:33,630 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:57:33,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:57:33,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:57:33,631 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:57:33,631 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2539530bc7d482c73cf7743c3e3167fff4f274988d9be6836a02ba65f37bdc1a [2023-11-19 07:57:33,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:33,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:33,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:34,001 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:34,001 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:34,003 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/eca-rers2012/Problem03_label00.c [2023-11-19 07:57:37,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:57:37,519 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:57:37,519 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/sv-benchmarks/c/eca-rers2012/Problem03_label00.c [2023-11-19 07:57:37,542 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/data/9f73a7a78/b1cb04acf5c04887986b2921ba26f81a/FLAG8be2be6ed [2023-11-19 07:57:37,560 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/data/9f73a7a78/b1cb04acf5c04887986b2921ba26f81a [2023-11-19 07:57:37,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:57:37,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:57:37,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:37,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:57:37,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:57:37,583 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:37" (1/1) ... [2023-11-19 07:57:37,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd32d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:37, skipping insertion in model container [2023-11-19 07:57:37,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:37" (1/1) ... [2023-11-19 07:57:37,688 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:38,416 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_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/sv-benchmarks/c/eca-rers2012/Problem03_label00.c[60148,60161] [2023-11-19 07:57:38,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:38,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:57:38,706 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_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/sv-benchmarks/c/eca-rers2012/Problem03_label00.c[60148,60161] [2023-11-19 07:57:38,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:38,737 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:57:38,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38 WrapperNode [2023-11-19 07:57:38,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:38,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:38,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:57:38,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:57:38,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:38,786 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:38,927 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-19 07:57:38,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:38,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:57:38,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:57:38,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:57:38,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:38,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:38,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:38,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:39,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:39,019 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:39,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:39,037 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:39,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:57:39,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:57:39,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:57:39,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:57:39,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (1/1) ... [2023-11-19 07:57:39,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:39,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:57:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:57:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:57:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:57:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:57:39,199 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:57:39,201 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:57:41,329 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:57:41,351 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:57:41,351 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:57:41,363 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:41 BoogieIcfgContainer [2023-11-19 07:57:41,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:57:41,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:57:41,367 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:57:41,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:57:41,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:37" (1/3) ... [2023-11-19 07:57:41,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9061da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:41, skipping insertion in model container [2023-11-19 07:57:41,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:38" (2/3) ... [2023-11-19 07:57:41,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9061da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:41, skipping insertion in model container [2023-11-19 07:57:41,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:41" (3/3) ... [2023-11-19 07:57:41,376 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label00.c [2023-11-19 07:57:41,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:57:41,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:57:41,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:57:41,477 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51a3cfcd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:57:41,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:57:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-19 07:57:41,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:41,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:41,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:41,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1538492478, now seen corresponding path program 1 times [2023-11-19 07:57:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168396663] [2023-11-19 07:57:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:42,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:42,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168396663] [2023-11-19 07:57:42,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168396663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:42,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:42,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:57:42,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340455285] [2023-11-19 07:57:42,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:42,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:42,869 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:44,307 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2023-11-19 07:57:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:44,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2023-11-19 07:57:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:44,333 INFO L225 Difference]: With dead ends: 857 [2023-11-19 07:57:44,333 INFO L226 Difference]: Without dead ends: 462 [2023-11-19 07:57:44,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:44,342 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 96 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:44,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:57:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-19 07:57:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2023-11-19 07:57:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2023-11-19 07:57:44,424 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 192 [2023-11-19 07:57:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:44,426 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2023-11-19 07:57:44,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2023-11-19 07:57:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:57:44,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:44,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:44,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:57:44,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:44,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1163580769, now seen corresponding path program 1 times [2023-11-19 07:57:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:44,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051228931] [2023-11-19 07:57:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:44,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051228931] [2023-11-19 07:57:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051228931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:44,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:57:44,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410851199] [2023-11-19 07:57:44,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:44,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:44,806 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:45,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:45,885 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2023-11-19 07:57:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2023-11-19 07:57:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:45,892 INFO L225 Difference]: With dead ends: 1344 [2023-11-19 07:57:45,893 INFO L226 Difference]: Without dead ends: 886 [2023-11-19 07:57:45,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:45,896 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:45,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:57:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-19 07:57:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2023-11-19 07:57:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2023-11-19 07:57:45,942 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 200 [2023-11-19 07:57:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:45,943 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2023-11-19 07:57:45,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2023-11-19 07:57:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-19 07:57:45,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:45,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:45,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:57:45,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:45,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash 764508428, now seen corresponding path program 1 times [2023-11-19 07:57:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:45,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967033327] [2023-11-19 07:57:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:57:47,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:47,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967033327] [2023-11-19 07:57:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967033327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:57:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382200039] [2023-11-19 07:57:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:57:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:57:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:57:47,101 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:48,394 INFO L93 Difference]: Finished difference Result 1884 states and 2886 transitions. [2023-11-19 07:57:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:57:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 207 [2023-11-19 07:57:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:48,406 INFO L225 Difference]: With dead ends: 1884 [2023-11-19 07:57:48,406 INFO L226 Difference]: Without dead ends: 842 [2023-11-19 07:57:48,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:57:48,417 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 299 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:48,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:57:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-11-19 07:57:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2023-11-19 07:57:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1148 transitions. [2023-11-19 07:57:48,451 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1148 transitions. Word has length 207 [2023-11-19 07:57:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:48,452 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1148 transitions. [2023-11-19 07:57:48,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1148 transitions. [2023-11-19 07:57:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-19 07:57:48,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:48,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:48,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:57:48,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:48,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2105497947, now seen corresponding path program 1 times [2023-11-19 07:57:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341517108] [2023-11-19 07:57:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:49,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:49,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341517108] [2023-11-19 07:57:49,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341517108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:49,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:49,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:57:49,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120921835] [2023-11-19 07:57:49,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:49,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:49,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:49,005 INFO L87 Difference]: Start difference. First operand 842 states and 1148 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:49,819 INFO L93 Difference]: Finished difference Result 2507 states and 3424 transitions. [2023-11-19 07:57:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:49,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2023-11-19 07:57:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:49,829 INFO L225 Difference]: With dead ends: 2507 [2023-11-19 07:57:49,830 INFO L226 Difference]: Without dead ends: 1667 [2023-11-19 07:57:49,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:49,843 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:49,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 49 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:57:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-11-19 07:57:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1658. [2023-11-19 07:57:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.3566686783343391) internal successors, (2248), 1657 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2248 transitions. [2023-11-19 07:57:49,893 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2248 transitions. Word has length 215 [2023-11-19 07:57:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:49,894 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2248 transitions. [2023-11-19 07:57:49,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2248 transitions. [2023-11-19 07:57:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-19 07:57:49,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:49,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:57:49,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:49,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1691408883, now seen corresponding path program 1 times [2023-11-19 07:57:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348691138] [2023-11-19 07:57:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:50,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:50,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348691138] [2023-11-19 07:57:50,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348691138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:50,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:50,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:57:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427736156] [2023-11-19 07:57:50,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:50,284 INFO L87 Difference]: Start difference. First operand 1658 states and 2248 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:51,114 INFO L93 Difference]: Finished difference Result 4952 states and 6720 transitions. [2023-11-19 07:57:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2023-11-19 07:57:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:51,133 INFO L225 Difference]: With dead ends: 4952 [2023-11-19 07:57:51,133 INFO L226 Difference]: Without dead ends: 3296 [2023-11-19 07:57:51,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:51,136 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 205 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:51,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 120 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:57:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2023-11-19 07:57:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 3288. [2023-11-19 07:57:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 1.3428658351080012) internal successors, (4414), 3287 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4414 transitions. [2023-11-19 07:57:51,229 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4414 transitions. Word has length 218 [2023-11-19 07:57:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:51,230 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 4414 transitions. [2023-11-19 07:57:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4414 transitions. [2023-11-19 07:57:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-19 07:57:51,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:51,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:57:51,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 762272552, now seen corresponding path program 1 times [2023-11-19 07:57:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001621332] [2023-11-19 07:57:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:51,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:51,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001621332] [2023-11-19 07:57:51,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001621332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:51,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:51,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:57:51,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687791989] [2023-11-19 07:57:51,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:51,752 INFO L87 Difference]: Start difference. First operand 3288 states and 4414 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:52,804 INFO L93 Difference]: Finished difference Result 9843 states and 13220 transitions. [2023-11-19 07:57:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2023-11-19 07:57:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:52,872 INFO L225 Difference]: With dead ends: 9843 [2023-11-19 07:57:52,872 INFO L226 Difference]: Without dead ends: 6557 [2023-11-19 07:57:52,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:52,881 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:52,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 99 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:57:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6557 states. [2023-11-19 07:57:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6557 to 6544. [2023-11-19 07:57:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 1.3214121962402567) internal successors, (8646), 6543 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 8646 transitions. [2023-11-19 07:57:53,114 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 8646 transitions. Word has length 220 [2023-11-19 07:57:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:53,115 INFO L495 AbstractCegarLoop]: Abstraction has 6544 states and 8646 transitions. [2023-11-19 07:57:53,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 8646 transitions. [2023-11-19 07:57:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-19 07:57:53,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:53,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:53,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:57:53,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:53,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1435470915, now seen corresponding path program 1 times [2023-11-19 07:57:53,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368079796] [2023-11-19 07:57:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:53,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:53,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368079796] [2023-11-19 07:57:53,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368079796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:53,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:53,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:57:53,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838061685] [2023-11-19 07:57:53,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:53,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:53,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:53,663 INFO L87 Difference]: Start difference. First operand 6544 states and 8646 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:54,582 INFO L93 Difference]: Finished difference Result 18800 states and 24854 transitions. [2023-11-19 07:57:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2023-11-19 07:57:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:54,666 INFO L225 Difference]: With dead ends: 18800 [2023-11-19 07:57:54,666 INFO L226 Difference]: Without dead ends: 12258 [2023-11-19 07:57:54,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:54,676 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:54,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 112 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:57:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2023-11-19 07:57:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 12248. [2023-11-19 07:57:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12248 states, 12247 states have (on average 1.3168939332081326) internal successors, (16128), 12247 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12248 states to 12248 states and 16128 transitions. [2023-11-19 07:57:55,122 INFO L78 Accepts]: Start accepts. Automaton has 12248 states and 16128 transitions. Word has length 222 [2023-11-19 07:57:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:55,123 INFO L495 AbstractCegarLoop]: Abstraction has 12248 states and 16128 transitions. [2023-11-19 07:57:55,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 12248 states and 16128 transitions. [2023-11-19 07:57:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-19 07:57:55,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:55,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:55,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:57:55,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:55,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:55,145 INFO L85 PathProgramCache]: Analyzing trace with hash -646286703, now seen corresponding path program 1 times [2023-11-19 07:57:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651266335] [2023-11-19 07:57:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:55,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:55,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651266335] [2023-11-19 07:57:55,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651266335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:55,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:55,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:57:55,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140663407] [2023-11-19 07:57:55,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:55,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:57:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:57:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:57:55,933 INFO L87 Difference]: Start difference. First operand 12248 states and 16128 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:57,605 INFO L93 Difference]: Finished difference Result 30769 states and 40437 transitions. [2023-11-19 07:57:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:57:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2023-11-19 07:57:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:57,649 INFO L225 Difference]: With dead ends: 30769 [2023-11-19 07:57:57,649 INFO L226 Difference]: Without dead ends: 18349 [2023-11-19 07:57:57,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:57:57,669 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 198 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:57,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 113 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:57:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18349 states. [2023-11-19 07:57:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18349 to 18348. [2023-11-19 07:57:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18348 states, 18347 states have (on average 1.2998310350466016) internal successors, (23848), 18347 states have internal predecessors, (23848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18348 states to 18348 states and 23848 transitions. [2023-11-19 07:57:58,142 INFO L78 Accepts]: Start accepts. Automaton has 18348 states and 23848 transitions. Word has length 223 [2023-11-19 07:57:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:58,143 INFO L495 AbstractCegarLoop]: Abstraction has 18348 states and 23848 transitions. [2023-11-19 07:57:58,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18348 states and 23848 transitions. [2023-11-19 07:57:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-11-19 07:57:58,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:58,178 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:57:58,178 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:58,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1736892038, now seen corresponding path program 1 times [2023-11-19 07:57:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:58,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109405114] [2023-11-19 07:57:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109405114] [2023-11-19 07:57:58,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109405114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:58,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64726927] [2023-11-19 07:57:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:58,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:58,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:58,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:57:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:59,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:57:59,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 07:57:59,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:57:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64726927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:57:59,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:57:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452319005] [2023-11-19 07:57:59,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:59,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:57:59,413 INFO L87 Difference]: Start difference. First operand 18348 states and 23848 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:00,408 INFO L93 Difference]: Finished difference Result 35281 states and 45906 transitions. [2023-11-19 07:58:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 230 [2023-11-19 07:58:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:00,445 INFO L225 Difference]: With dead ends: 35281 [2023-11-19 07:58:00,445 INFO L226 Difference]: Without dead ends: 16935 [2023-11-19 07:58:00,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:00,465 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 32 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:00,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 300 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:58:00,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16935 states. [2023-11-19 07:58:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16935 to 16927. [2023-11-19 07:58:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16927 states, 16926 states have (on average 1.2803970223325063) internal successors, (21672), 16926 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16927 states to 16927 states and 21672 transitions. [2023-11-19 07:58:00,870 INFO L78 Accepts]: Start accepts. Automaton has 16927 states and 21672 transitions. Word has length 230 [2023-11-19 07:58:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:00,871 INFO L495 AbstractCegarLoop]: Abstraction has 16927 states and 21672 transitions. [2023-11-19 07:58:00,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 16927 states and 21672 transitions. [2023-11-19 07:58:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-19 07:58:00,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:00,899 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:00,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:01,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:01,121 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:58:01,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash 711618230, now seen corresponding path program 1 times [2023-11-19 07:58:01,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:01,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022478683] [2023-11-19 07:58:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 07:58:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022478683] [2023-11-19 07:58:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022478683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:01,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:01,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662010530] [2023-11-19 07:58:01,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:01,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:01,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:01,699 INFO L87 Difference]: Start difference. First operand 16927 states and 21672 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:02,789 INFO L93 Difference]: Finished difference Result 42581 states and 54533 transitions. [2023-11-19 07:58:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 236 [2023-11-19 07:58:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:02,824 INFO L225 Difference]: With dead ends: 42581 [2023-11-19 07:58:02,825 INFO L226 Difference]: Without dead ends: 25656 [2023-11-19 07:58:02,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:02,844 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 203 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:02,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 127 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:58:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25656 states. [2023-11-19 07:58:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25656 to 25656. [2023-11-19 07:58:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25656 states, 25655 states have (on average 1.1929838238160202) internal successors, (30606), 25655 states have internal predecessors, (30606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25656 states to 25656 states and 30606 transitions. [2023-11-19 07:58:03,197 INFO L78 Accepts]: Start accepts. Automaton has 25656 states and 30606 transitions. Word has length 236 [2023-11-19 07:58:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:03,197 INFO L495 AbstractCegarLoop]: Abstraction has 25656 states and 30606 transitions. [2023-11-19 07:58:03,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25656 states and 30606 transitions. [2023-11-19 07:58:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-19 07:58:03,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:03,236 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:03,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:58:03,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:58:03,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2143384850, now seen corresponding path program 1 times [2023-11-19 07:58:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119794008] [2023-11-19 07:58:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:58:03,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119794008] [2023-11-19 07:58:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119794008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:03,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269966640] [2023-11-19 07:58:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:03,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:03,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:03,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:58:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:04,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:58:04,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:58:04,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269966640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:04,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:58:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466349492] [2023-11-19 07:58:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:04,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:04,240 INFO L87 Difference]: Start difference. First operand 25656 states and 30606 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:05,290 INFO L93 Difference]: Finished difference Result 54353 states and 65467 transitions. [2023-11-19 07:58:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 236 [2023-11-19 07:58:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:05,345 INFO L225 Difference]: With dead ends: 54353 [2023-11-19 07:58:05,346 INFO L226 Difference]: Without dead ends: 29105 [2023-11-19 07:58:05,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:05,369 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 215 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:05,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 333 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:58:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29105 states. [2023-11-19 07:58:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29105 to 24839. [2023-11-19 07:58:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24839 states, 24838 states have (on average 1.1496094693614622) internal successors, (28554), 24838 states have internal predecessors, (28554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24839 states to 24839 states and 28554 transitions. [2023-11-19 07:58:05,977 INFO L78 Accepts]: Start accepts. Automaton has 24839 states and 28554 transitions. Word has length 236 [2023-11-19 07:58:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:05,978 INFO L495 AbstractCegarLoop]: Abstraction has 24839 states and 28554 transitions. [2023-11-19 07:58:05,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24839 states and 28554 transitions. [2023-11-19 07:58:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-19 07:58:06,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:06,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:06,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:06,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:06,237 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:58:06,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1945657073, now seen corresponding path program 1 times [2023-11-19 07:58:06,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:06,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705664872] [2023-11-19 07:58:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:06,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705664872] [2023-11-19 07:58:06,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705664872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:06,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:06,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:06,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147854212] [2023-11-19 07:58:06,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:06,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:06,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:06,766 INFO L87 Difference]: Start difference. First operand 24839 states and 28554 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:07,999 INFO L93 Difference]: Finished difference Result 63526 states and 73314 transitions. [2023-11-19 07:58:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 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 243 [2023-11-19 07:58:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:08,062 INFO L225 Difference]: With dead ends: 63526 [2023-11-19 07:58:08,063 INFO L226 Difference]: Without dead ends: 39299 [2023-11-19 07:58:08,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:08,087 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 206 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:08,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 150 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:58:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39299 states. [2023-11-19 07:58:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39299 to 39294. [2023-11-19 07:58:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39294 states, 39293 states have (on average 1.1526735041864964) internal successors, (45292), 39293 states have internal predecessors, (45292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39294 states to 39294 states and 45292 transitions. [2023-11-19 07:58:08,801 INFO L78 Accepts]: Start accepts. Automaton has 39294 states and 45292 transitions. Word has length 243 [2023-11-19 07:58:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:08,801 INFO L495 AbstractCegarLoop]: Abstraction has 39294 states and 45292 transitions. [2023-11-19 07:58:08,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 39294 states and 45292 transitions. [2023-11-19 07:58:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-19 07:58:08,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:08,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:58:08,969 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:58:08,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2075124385, now seen corresponding path program 1 times [2023-11-19 07:58:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791422939] [2023-11-19 07:58:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 07:58:09,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:09,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791422939] [2023-11-19 07:58:09,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791422939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:09,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:09,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:09,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652284448] [2023-11-19 07:58:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:09,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:09,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:09,552 INFO L87 Difference]: Start difference. First operand 39294 states and 45292 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:11,003 INFO L93 Difference]: Finished difference Result 97515 states and 112102 transitions. [2023-11-19 07:58:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:11,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 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 254 [2023-11-19 07:58:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:11,085 INFO L225 Difference]: With dead ends: 97515 [2023-11-19 07:58:11,085 INFO L226 Difference]: Without dead ends: 58833 [2023-11-19 07:58:11,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:11,105 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:11,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 139 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:58:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states. [2023-11-19 07:58:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58833 to 58827. [2023-11-19 07:58:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58827 states, 58826 states have (on average 1.1421990276408391) internal successors, (67191), 58826 states have internal predecessors, (67191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58827 states to 58827 states and 67191 transitions. [2023-11-19 07:58:12,039 INFO L78 Accepts]: Start accepts. Automaton has 58827 states and 67191 transitions. Word has length 254 [2023-11-19 07:58:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:12,039 INFO L495 AbstractCegarLoop]: Abstraction has 58827 states and 67191 transitions. [2023-11-19 07:58:12,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 58827 states and 67191 transitions. [2023-11-19 07:58:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-19 07:58:12,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:12,062 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:12,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:58:12,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:58:12,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1082442182, now seen corresponding path program 1 times [2023-11-19 07:58:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:12,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498806093] [2023-11-19 07:58:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:12,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 07:58:12,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:12,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498806093] [2023-11-19 07:58:12,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498806093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691939754] [2023-11-19 07:58:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:12,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:12,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:13,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:58:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:13,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:58:13,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 07:58:13,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:13,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691939754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:13,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:58:13,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932726606] [2023-11-19 07:58:13,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:13,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:13,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:13,528 INFO L87 Difference]: Start difference. First operand 58827 states and 67191 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:14,829 INFO L93 Difference]: Finished difference Result 148971 states and 170299 transitions. [2023-11-19 07:58:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 268 [2023-11-19 07:58:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:14,964 INFO L225 Difference]: With dead ends: 148971 [2023-11-19 07:58:14,964 INFO L226 Difference]: Without dead ends: 91366 [2023-11-19 07:58:15,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:15,163 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:15,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 120 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:58:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91366 states. [2023-11-19 07:58:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91366 to 89940. [2023-11-19 07:58:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89940 states, 89939 states have (on average 1.1327455275242109) internal successors, (101878), 89939 states have internal predecessors, (101878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89940 states to 89940 states and 101878 transitions. [2023-11-19 07:58:16,716 INFO L78 Accepts]: Start accepts. Automaton has 89940 states and 101878 transitions. Word has length 268 [2023-11-19 07:58:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:16,716 INFO L495 AbstractCegarLoop]: Abstraction has 89940 states and 101878 transitions. [2023-11-19 07:58:16,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 89940 states and 101878 transitions. [2023-11-19 07:58:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-11-19 07:58:16,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:16,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:16,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:16,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39d0400d-fe0e-4d0a-89a8-2dd47b0ba16f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:58:16,988 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:58:16,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1803840471, now seen corresponding path program 1 times [2023-11-19 07:58:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:16,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664965298] [2023-11-19 07:58:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:17,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664965298] [2023-11-19 07:58:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664965298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:17,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:17,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:58:17,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664772363] [2023-11-19 07:58:17,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:17,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:17,650 INFO L87 Difference]: Start difference. First operand 89940 states and 101878 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:19,126 INFO L93 Difference]: Finished difference Result 181089 states and 205578 transitions. [2023-11-19 07:58:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2023-11-19 07:58:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:19,242 INFO L225 Difference]: With dead ends: 181089 [2023-11-19 07:58:19,242 INFO L226 Difference]: Without dead ends: 92371 [2023-11-19 07:58:19,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:19,287 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 72 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:19,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 280 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:58:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92371 states.