./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl --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 fdbc0fdc55527506c6212fedb75f15bc177498c1e0d7baa5a0c1614f273a6557 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:43,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:43,405 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:04:43,412 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:43,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:43,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:43,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:43,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:43,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:43,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:43,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:43,468 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:43,469 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:43,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:43,471 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:04:43,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:43,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:43,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:43,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:43,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:04:43,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:43,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:04:43,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:43,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:04:43,476 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:43,477 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:43,478 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:43,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:43,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:43,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:43,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:43,481 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:04:43,481 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:43,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:43,482 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:43,482 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:04:43,482 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:43,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:43,483 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:43,483 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_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdbc0fdc55527506c6212fedb75f15bc177498c1e0d7baa5a0c1614f273a6557 [2023-11-12 02:04:43,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:43,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:43,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:43,871 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:43,872 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:43,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/eca-rers2012/Problem12_label41.c [2023-11-12 02:04:47,184 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:47,771 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:47,772 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/sv-benchmarks/c/eca-rers2012/Problem12_label41.c [2023-11-12 02:04:47,820 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/data/4f4f70329/b1433a30dcd94f009445ba1b0af6dcd3/FLAGf47d87ef0 [2023-11-12 02:04:47,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/data/4f4f70329/b1433a30dcd94f009445ba1b0af6dcd3 [2023-11-12 02:04:47,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:47,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:47,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:47,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:47,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:47,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:47" (1/1) ... [2023-11-12 02:04:47,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d4fcea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:47, skipping insertion in model container [2023-11-12 02:04:47,868 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:47" (1/1) ... [2023-11-12 02:04:48,082 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:48,497 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_40708325-d386-42e5-82e3-80443cc460a5/sv-benchmarks/c/eca-rers2012/Problem12_label41.c[6479,6492] [2023-11-12 02:04:49,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:49,801 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:49,832 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_40708325-d386-42e5-82e3-80443cc460a5/sv-benchmarks/c/eca-rers2012/Problem12_label41.c[6479,6492] [2023-11-12 02:04:50,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:50,391 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:50,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50 WrapperNode [2023-11-12 02:04:50,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:50,394 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:50,394 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:50,394 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:50,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:50,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:50,760 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758 [2023-11-12 02:04:50,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:50,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:50,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:50,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:50,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:50,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:50,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:50,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:51,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:51,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:51,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:51,215 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:51,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:51,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:51,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:51,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:51,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (1/1) ... [2023-11-12 02:04:51,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:51,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:51,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:51,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:51,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:51,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:51,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:51,701 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:51,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:57,134 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:57,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:57,152 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:04:57,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:57 BoogieIcfgContainer [2023-11-12 02:04:57,155 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:57,158 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:57,158 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:57,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:57,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:47" (1/3) ... [2023-11-12 02:04:57,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1158bdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:57, skipping insertion in model container [2023-11-12 02:04:57,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:50" (2/3) ... [2023-11-12 02:04:57,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1158bdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:57, skipping insertion in model container [2023-11-12 02:04:57,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:57" (3/3) ... [2023-11-12 02:04:57,164 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label41.c [2023-11-12 02:04:57,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:57,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:04:57,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:57,264 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;@33abd620, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:57,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:04:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 02:04:57,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:57,283 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] [2023-11-12 02:04:57,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:57,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1382487458, now seen corresponding path program 1 times [2023-11-12 02:04:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:57,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361573626] [2023-11-12 02:04:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:57,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:57,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361573626] [2023-11-12 02:04:57,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361573626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:57,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:57,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927547613] [2023-11-12 02:04:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:57,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:57,741 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:02,828 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2023-11-12 02:05:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-12 02:05:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:02,864 INFO L225 Difference]: With dead ends: 2388 [2023-11-12 02:05:02,864 INFO L226 Difference]: Without dead ends: 1506 [2023-11-12 02:05:02,873 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 [2023-11-12 02:05:02,877 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 782 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:02,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-12 02:05:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2023-11-12 02:05:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2023-11-12 02:05:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2023-11-12 02:05:03,024 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 52 [2023-11-12 02:05:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:03,024 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2023-11-12 02:05:03,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2023-11-12 02:05:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 02:05:03,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:03,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:03,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:05:03,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:03,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1969596239, now seen corresponding path program 1 times [2023-11-12 02:05:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:03,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779715288] [2023-11-12 02:05:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:03,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:03,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779715288] [2023-11-12 02:05:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779715288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:03,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:03,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:03,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317474474] [2023-11-12 02:05:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:03,602 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:09,822 INFO L93 Difference]: Finished difference Result 4549 states and 7430 transitions. [2023-11-12 02:05:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-11-12 02:05:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:09,843 INFO L225 Difference]: With dead ends: 4549 [2023-11-12 02:05:09,844 INFO L226 Difference]: Without dead ends: 3008 [2023-11-12 02:05:09,847 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 [2023-11-12 02:05:09,849 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 688 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3732 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 4396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:09,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 656 Invalid, 4396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3732 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-12 02:05:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2023-11-12 02:05:10,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2023-11-12 02:05:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.341536415031593) internal successors, (4034), 3007 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4034 transitions. [2023-11-12 02:05:10,021 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4034 transitions. Word has length 123 [2023-11-12 02:05:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:10,022 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4034 transitions. [2023-11-12 02:05:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4034 transitions. [2023-11-12 02:05:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-12 02:05:10,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:10,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:10,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:05:10,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:10,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1310463314, now seen corresponding path program 1 times [2023-11-12 02:05:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:10,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466364142] [2023-11-12 02:05:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:10,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466364142] [2023-11-12 02:05:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466364142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:10,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:10,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133747639] [2023-11-12 02:05:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:10,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:10,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:10,575 INFO L87 Difference]: Start difference. First operand 3008 states and 4034 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:16,618 INFO L93 Difference]: Finished difference Result 9769 states and 12892 transitions. [2023-11-12 02:05:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:16,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2023-11-12 02:05:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:16,659 INFO L225 Difference]: With dead ends: 9769 [2023-11-12 02:05:16,659 INFO L226 Difference]: Without dead ends: 6763 [2023-11-12 02:05:16,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:05:16,665 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 2093 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4273 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:16,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2093 Valid, 452 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4273 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-12 02:05:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2023-11-12 02:05:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2023-11-12 02:05:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.287341023365868) internal successors, (8705), 6762 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8705 transitions. [2023-11-12 02:05:16,853 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8705 transitions. Word has length 161 [2023-11-12 02:05:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:16,854 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 8705 transitions. [2023-11-12 02:05:16,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8705 transitions. [2023-11-12 02:05:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-12 02:05:16,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:16,861 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:05:16,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1590426961, now seen corresponding path program 1 times [2023-11-12 02:05:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418076575] [2023-11-12 02:05:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-12 02:05:17,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418076575] [2023-11-12 02:05:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418076575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:17,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:17,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:17,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556028327] [2023-11-12 02:05:17,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:17,509 INFO L87 Difference]: Start difference. First operand 6763 states and 8705 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:22,773 INFO L93 Difference]: Finished difference Result 15816 states and 21393 transitions. [2023-11-12 02:05:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 264 [2023-11-12 02:05:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:22,826 INFO L225 Difference]: With dead ends: 15816 [2023-11-12 02:05:22,826 INFO L226 Difference]: Without dead ends: 9769 [2023-11-12 02:05:22,834 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 [2023-11-12 02:05:22,836 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 850 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:22,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 492 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-12 02:05:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2023-11-12 02:05:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2023-11-12 02:05:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.272987917263977) internal successors, (12432), 9766 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12432 transitions. [2023-11-12 02:05:23,141 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12432 transitions. Word has length 264 [2023-11-12 02:05:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12432 transitions. [2023-11-12 02:05:23,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12432 transitions. [2023-11-12 02:05:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-11-12 02:05:23,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:23,151 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:23,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:05:23,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:23,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash -36677128, now seen corresponding path program 1 times [2023-11-12 02:05:23,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:23,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889726855] [2023-11-12 02:05:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:24,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:24,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889726855] [2023-11-12 02:05:24,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889726855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703101491] [2023-11-12 02:05:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:24,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:24,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:24,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:24,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:05:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:24,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:05:24,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-12 02:05:24,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:05:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703101491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:24,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:05:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-12 02:05:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276771258] [2023-11-12 02:05:24,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:05:24,361 INFO L87 Difference]: Start difference. First operand 9767 states and 12432 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:28,532 INFO L93 Difference]: Finished difference Result 24789 states and 32538 transitions. [2023-11-12 02:05:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:28,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2023-11-12 02:05:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:28,595 INFO L225 Difference]: With dead ends: 24789 [2023-11-12 02:05:28,595 INFO L226 Difference]: Without dead ends: 15775 [2023-11-12 02:05:28,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:05:28,610 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 716 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:28,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 574 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-12 02:05:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2023-11-12 02:05:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2023-11-12 02:05:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2571953848104476) internal successors, (19831), 15774 states have internal predecessors, (19831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19831 transitions. [2023-11-12 02:05:28,944 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19831 transitions. Word has length 282 [2023-11-12 02:05:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:28,946 INFO L495 AbstractCegarLoop]: Abstraction has 15775 states and 19831 transitions. [2023-11-12 02:05:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19831 transitions. [2023-11-12 02:05:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-11-12 02:05:28,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:28,954 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:28,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40708325-d386-42e5-82e3-80443cc460a5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:29,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:29,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash 591381476, now seen corresponding path program 1 times [2023-11-12 02:05:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:29,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397804278] [2023-11-12 02:05:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:29,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-12 02:05:29,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:29,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397804278] [2023-11-12 02:05:29,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397804278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:29,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:29,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:05:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316697705] [2023-11-12 02:05:29,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:29,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:29,607 INFO L87 Difference]: Start difference. First operand 15775 states and 19831 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)