./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/interleave_bits.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/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_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/interleave_bits.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/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_c3e891c5-ff48-451f-866e-46cf2084177a/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 41cbcdfa6f09b615c08bb2dbf908be5e0a68dc8c6a10c0ba76a3c4e4c07e69fb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:53,143 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:53,270 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:53,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:53,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:53,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:53,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:53,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:53,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:53,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:53,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:53,336 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:53,336 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:53,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:53,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:53,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:53,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:53,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:53,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:53,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:53,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:53,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:53,343 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:53,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:53,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:53,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:53,345 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:53,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:53,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:53,346 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:53,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:53,348 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:53,348 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:53,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:53,349 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:53,349 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:53,349 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:53,350 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:53,350 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:53,350 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_c3e891c5-ff48-451f-866e-46cf2084177a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41cbcdfa6f09b615c08bb2dbf908be5e0a68dc8c6a10c0ba76a3c4e4c07e69fb [2023-11-19 07:35:53,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:53,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:53,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:53,657 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:53,658 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:53,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/bitvector/interleave_bits.i [2023-11-19 07:35:57,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:57,279 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:57,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/sv-benchmarks/c/bitvector/interleave_bits.i [2023-11-19 07:35:57,291 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/data/709abb13a/bba7d7a67ae74ba4a6f71b3c43c3425d/FLAGbfeae6835 [2023-11-19 07:35:57,316 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/data/709abb13a/bba7d7a67ae74ba4a6f71b3c43c3425d [2023-11-19 07:35:57,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:57,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:57,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:57,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:57,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:57,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1813ff9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57, skipping insertion in model container [2023-11-19 07:35:57,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,377 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:57,587 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_c3e891c5-ff48-451f-866e-46cf2084177a/sv-benchmarks/c/bitvector/interleave_bits.i[1175,1188] [2023-11-19 07:35:57,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:57,661 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:57,678 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_c3e891c5-ff48-451f-866e-46cf2084177a/sv-benchmarks/c/bitvector/interleave_bits.i[1175,1188] [2023-11-19 07:35:57,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:57,734 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:57,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57 WrapperNode [2023-11-19 07:35:57,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:57,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:57,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:57,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:57,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,768 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,813 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 217 [2023-11-19 07:35:57,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:57,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:57,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:57,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:57,828 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,841 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,870 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,872 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:57,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:57,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:57,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:57,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (1/1) ... [2023-11-19 07:35:57,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:57,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:57,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:57,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:58,078 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:58,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:58,660 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:58,671 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:58,671 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:35:58,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:58 BoogieIcfgContainer [2023-11-19 07:35:58,676 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:58,679 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:58,680 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:58,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:58,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:57" (1/3) ... [2023-11-19 07:35:58,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1491d4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:58, skipping insertion in model container [2023-11-19 07:35:58,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:57" (2/3) ... [2023-11-19 07:35:58,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1491d4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:58, skipping insertion in model container [2023-11-19 07:35:58,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:58" (3/3) ... [2023-11-19 07:35:58,688 INFO L112 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2023-11-19 07:35:58,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:58,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:58,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:58,781 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;@11cd0825, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:58,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:35:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 65 states have (on average 1.7692307692307692) internal successors, (115), 66 states have internal predecessors, (115), 0 states have call successors, (0), 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 07:35:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:35:58,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:58,799 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] [2023-11-19 07:35:58,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:58,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1964048980, now seen corresponding path program 1 times [2023-11-19 07:35:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:58,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482717786] [2023-11-19 07:35:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:58,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:59,097 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 07:35:59,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482717786] [2023-11-19 07:35:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482717786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:59,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:59,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657502419] [2023-11-19 07:35:59,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:59,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:35:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:35:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:35:59,166 INFO L87 Difference]: Start difference. First operand has 67 states, 65 states have (on average 1.7692307692307692) internal successors, (115), 66 states have internal predecessors, (115), 0 states have call successors, (0), 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 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:59,209 INFO L93 Difference]: Finished difference Result 118 states and 200 transitions. [2023-11-19 07:35:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:35:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-19 07:35:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:59,223 INFO L225 Difference]: With dead ends: 118 [2023-11-19 07:35:59,224 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:35:59,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:35:59,232 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:59,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:35:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:35:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-19 07:35:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.7580645161290323) internal successors, (109), 62 states have internal predecessors, (109), 0 states have call successors, (0), 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 07:35:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2023-11-19 07:35:59,286 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 32 [2023-11-19 07:35:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:59,287 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2023-11-19 07:35:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2023-11-19 07:35:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:35:59,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:59,291 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] [2023-11-19 07:35:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:59,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:59,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1504841045, now seen corresponding path program 1 times [2023-11-19 07:35:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788037088] [2023-11-19 07:35:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:59,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:59,609 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 07:35:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:59,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788037088] [2023-11-19 07:35:59,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788037088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:59,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:59,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102714991] [2023-11-19 07:35:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:59,617 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:59,761 INFO L93 Difference]: Finished difference Result 138 states and 243 transitions. [2023-11-19 07:35:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:59,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-19 07:35:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:59,782 INFO L225 Difference]: With dead ends: 138 [2023-11-19 07:35:59,783 INFO L226 Difference]: Without dead ends: 77 [2023-11-19 07:35:59,788 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 07:35:59,791 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 22 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:59,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 199 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:35:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-19 07:35:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2023-11-19 07:35:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 68 states have internal predecessors, (117), 0 states have call successors, (0), 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 07:35:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2023-11-19 07:35:59,813 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 32 [2023-11-19 07:35:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:59,814 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2023-11-19 07:35:59,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2023-11-19 07:35:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 07:35:59,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:59,823 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] [2023-11-19 07:35:59,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:35:59,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:59,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash 764891864, now seen corresponding path program 1 times [2023-11-19 07:35:59,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:59,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794096083] [2023-11-19 07:35:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:59,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794096083] [2023-11-19 07:36:00,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794096083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:00,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344235759] [2023-11-19 07:36:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:00,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:00,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:00,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:00,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:00,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:36:00,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:00,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344235759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:00,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:36:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128356651] [2023-11-19 07:36:00,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:36:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:36:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:36:00,546 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:36:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:00,719 INFO L93 Difference]: Finished difference Result 167 states and 295 transitions. [2023-11-19 07:36:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 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 42 [2023-11-19 07:36:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:00,721 INFO L225 Difference]: With dead ends: 167 [2023-11-19 07:36:00,721 INFO L226 Difference]: Without dead ends: 106 [2023-11-19 07:36:00,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:00,724 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 154 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:00,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 341 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-19 07:36:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-11-19 07:36:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.7428571428571429) internal successors, (183), 105 states have internal predecessors, (183), 0 states have call successors, (0), 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 07:36:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 183 transitions. [2023-11-19 07:36:00,736 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 183 transitions. Word has length 42 [2023-11-19 07:36:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:00,736 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 183 transitions. [2023-11-19 07:36:00,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:36:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 183 transitions. [2023-11-19 07:36:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 07:36:00,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:00,741 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2023-11-19 07:36:00,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:00,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:00,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:00,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1185084183, now seen corresponding path program 1 times [2023-11-19 07:36:00,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:00,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530913472] [2023-11-19 07:36:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:36:01,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530913472] [2023-11-19 07:36:01,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530913472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:01,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:01,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:01,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456366866] [2023-11-19 07:36:01,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:01,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:01,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:01,101 INFO L87 Difference]: Start difference. First operand 106 states and 183 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 07:36:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:01,144 INFO L93 Difference]: Finished difference Result 192 states and 337 transitions. [2023-11-19 07:36:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 72 [2023-11-19 07:36:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:01,147 INFO L225 Difference]: With dead ends: 192 [2023-11-19 07:36:01,147 INFO L226 Difference]: Without dead ends: 118 [2023-11-19 07:36:01,148 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 07:36:01,156 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 99 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:01,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 140 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-19 07:36:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2023-11-19 07:36:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.7339449541284404) internal successors, (189), 109 states have internal predecessors, (189), 0 states have call successors, (0), 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 07:36:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 189 transitions. [2023-11-19 07:36:01,167 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 189 transitions. Word has length 72 [2023-11-19 07:36:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:01,167 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 189 transitions. [2023-11-19 07:36:01,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 07:36:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 189 transitions. [2023-11-19 07:36:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 07:36:01,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:01,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:36:01,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:01,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash 743188519, now seen corresponding path program 2 times [2023-11-19 07:36:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:01,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673559626] [2023-11-19 07:36:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:01,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:36:01,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:01,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673559626] [2023-11-19 07:36:01,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673559626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:01,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292907640] [2023-11-19 07:36:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:01,444 INFO L87 Difference]: Start difference. First operand 110 states and 189 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 07:36:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:01,474 INFO L93 Difference]: Finished difference Result 241 states and 420 transitions. [2023-11-19 07:36:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:01,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 72 [2023-11-19 07:36:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:01,477 INFO L225 Difference]: With dead ends: 241 [2023-11-19 07:36:01,477 INFO L226 Difference]: Without dead ends: 152 [2023-11-19 07:36:01,478 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 07:36:01,479 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:01,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 210 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-19 07:36:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2023-11-19 07:36:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 113 states have internal predecessors, (193), 0 states have call successors, (0), 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 07:36:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 193 transitions. [2023-11-19 07:36:01,499 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 193 transitions. Word has length 72 [2023-11-19 07:36:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:01,500 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 193 transitions. [2023-11-19 07:36:01,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 07:36:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 193 transitions. [2023-11-19 07:36:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 07:36:01,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:01,504 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:36:01,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:01,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -824171871, now seen corresponding path program 1 times [2023-11-19 07:36:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:01,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993485584] [2023-11-19 07:36:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:01,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:01,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993485584] [2023-11-19 07:36:01,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993485584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:01,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413654995] [2023-11-19 07:36:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:01,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:01,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:01,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:01,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:01,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:36:02,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:02,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413654995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:02,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:36:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792118788] [2023-11-19 07:36:02,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:36:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:02,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:36:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:36:02,307 INFO L87 Difference]: Start difference. First operand 114 states and 193 transitions. Second operand has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 states have internal predecessors, (116), 0 states have call successors, (0), 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 07:36:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:02,781 INFO L93 Difference]: Finished difference Result 291 states and 505 transitions. [2023-11-19 07:36:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:36:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 states have internal predecessors, (116), 0 states have call successors, (0), 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 72 [2023-11-19 07:36:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:02,786 INFO L225 Difference]: With dead ends: 291 [2023-11-19 07:36:02,786 INFO L226 Difference]: Without dead ends: 214 [2023-11-19 07:36:02,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:36:02,792 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 435 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:02,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1130 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:36:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-19 07:36:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2023-11-19 07:36:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.7044334975369457) internal successors, (346), 203 states have internal predecessors, (346), 0 states have call successors, (0), 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 07:36:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 346 transitions. [2023-11-19 07:36:02,828 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 346 transitions. Word has length 72 [2023-11-19 07:36:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:02,831 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 346 transitions. [2023-11-19 07:36:02,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 states have internal predecessors, (116), 0 states have call successors, (0), 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 07:36:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 346 transitions. [2023-11-19 07:36:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 07:36:02,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:02,838 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:02,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:03,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:03,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:03,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1866809587, now seen corresponding path program 2 times [2023-11-19 07:36:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261336339] [2023-11-19 07:36:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:04,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:04,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261336339] [2023-11-19 07:36:04,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261336339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:04,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372606005] [2023-11-19 07:36:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:04,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:04,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:04,058 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:04,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:36:04,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:04,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:36:04,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:04,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:04,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372606005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:04,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:04,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-19 07:36:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633044513] [2023-11-19 07:36:04,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:36:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:36:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:36:04,992 INFO L87 Difference]: Start difference. First operand 204 states and 346 transitions. Second operand has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 0 states have call successors, (0), 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 07:36:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:07,073 INFO L93 Difference]: Finished difference Result 500 states and 866 transitions. [2023-11-19 07:36:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:36:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 0 states have call successors, (0), 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 132 [2023-11-19 07:36:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:07,078 INFO L225 Difference]: With dead ends: 500 [2023-11-19 07:36:07,078 INFO L226 Difference]: Without dead ends: 378 [2023-11-19 07:36:07,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:36:07,081 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1537 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:07,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 2847 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:36:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-19 07:36:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 365. [2023-11-19 07:36:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.7005494505494505) internal successors, (619), 364 states have internal predecessors, (619), 0 states have call successors, (0), 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 07:36:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 619 transitions. [2023-11-19 07:36:07,110 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 619 transitions. Word has length 132 [2023-11-19 07:36:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:07,112 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 619 transitions. [2023-11-19 07:36:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 0 states have call successors, (0), 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 07:36:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 619 transitions. [2023-11-19 07:36:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-19 07:36:07,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:07,116 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:07,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:07,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:07,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash -458831803, now seen corresponding path program 3 times [2023-11-19 07:36:07,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:07,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90169779] [2023-11-19 07:36:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:07,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2023-11-19 07:36:09,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:09,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90169779] [2023-11-19 07:36:09,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90169779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:09,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:09,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:36:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130780019] [2023-11-19 07:36:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:36:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:36:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:36:09,376 INFO L87 Difference]: Start difference. First operand 365 states and 619 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:09,776 INFO L93 Difference]: Finished difference Result 1403 states and 2376 transitions. [2023-11-19 07:36:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:36:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2023-11-19 07:36:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:09,786 INFO L225 Difference]: With dead ends: 1403 [2023-11-19 07:36:09,786 INFO L226 Difference]: Without dead ends: 1047 [2023-11-19 07:36:09,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:36:09,789 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 127 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:09,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 922 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:36:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-11-19 07:36:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 873. [2023-11-19 07:36:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5928899082568808) internal successors, (1389), 872 states have internal predecessors, (1389), 0 states have call successors, (0), 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 07:36:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1389 transitions. [2023-11-19 07:36:09,833 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1389 transitions. Word has length 192 [2023-11-19 07:36:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:09,836 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1389 transitions. [2023-11-19 07:36:09,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1389 transitions. [2023-11-19 07:36:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-19 07:36:09,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:09,840 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:09,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:36:09,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:09,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1337158787, now seen corresponding path program 1 times [2023-11-19 07:36:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25840495] [2023-11-19 07:36:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25840495] [2023-11-19 07:36:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25840495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:36:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561374262] [2023-11-19 07:36:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:36:10,558 INFO L87 Difference]: Start difference. First operand 873 states and 1389 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:36:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:12,654 INFO L93 Difference]: Finished difference Result 926 states and 1473 transitions. [2023-11-19 07:36:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2023-11-19 07:36:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:12,662 INFO L225 Difference]: With dead ends: 926 [2023-11-19 07:36:12,662 INFO L226 Difference]: Without dead ends: 918 [2023-11-19 07:36:12,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:36:12,664 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 28 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:12,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 293 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 07:36:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-11-19 07:36:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 914. [2023-11-19 07:36:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 1.5991237677984667) internal successors, (1460), 913 states have internal predecessors, (1460), 0 states have call successors, (0), 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 07:36:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1460 transitions. [2023-11-19 07:36:12,701 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1460 transitions. Word has length 193 [2023-11-19 07:36:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:12,702 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1460 transitions. [2023-11-19 07:36:12,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1460 transitions. [2023-11-19 07:36:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-19 07:36:12,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:12,707 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:12,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:36:12,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:12,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash 318565411, now seen corresponding path program 1 times [2023-11-19 07:36:12,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:12,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618251281] [2023-11-19 07:36:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:13,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618251281] [2023-11-19 07:36:13,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618251281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:13,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:13,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:13,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936912229] [2023-11-19 07:36:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:13,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:13,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:13,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:13,566 INFO L87 Difference]: Start difference. First operand 914 states and 1460 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:13,677 INFO L93 Difference]: Finished difference Result 958 states and 1524 transitions. [2023-11-19 07:36:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2023-11-19 07:36:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:13,684 INFO L225 Difference]: With dead ends: 958 [2023-11-19 07:36:13,684 INFO L226 Difference]: Without dead ends: 932 [2023-11-19 07:36:13,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:13,685 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 4 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:13,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-19 07:36:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 923. [2023-11-19 07:36:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.5911062906724511) internal successors, (1467), 922 states have internal predecessors, (1467), 0 states have call successors, (0), 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 07:36:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1467 transitions. [2023-11-19 07:36:13,720 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1467 transitions. Word has length 193 [2023-11-19 07:36:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:13,721 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1467 transitions. [2023-11-19 07:36:13,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1467 transitions. [2023-11-19 07:36:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-19 07:36:13,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:13,725 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:13,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:36:13,726 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:13,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 426319216, now seen corresponding path program 1 times [2023-11-19 07:36:13,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894821429] [2023-11-19 07:36:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2023-11-19 07:36:14,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:14,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894821429] [2023-11-19 07:36:14,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894821429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:14,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:14,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:36:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459386426] [2023-11-19 07:36:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:14,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:36:14,314 INFO L87 Difference]: Start difference. First operand 923 states and 1467 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:36:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:14,368 INFO L93 Difference]: Finished difference Result 2268 states and 3608 transitions. [2023-11-19 07:36:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 193 [2023-11-19 07:36:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:14,380 INFO L225 Difference]: With dead ends: 2268 [2023-11-19 07:36:14,380 INFO L226 Difference]: Without dead ends: 1375 [2023-11-19 07:36:14,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:14,383 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 24 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:14,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 310 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2023-11-19 07:36:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1211. [2023-11-19 07:36:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.5537190082644627) internal successors, (1880), 1210 states have internal predecessors, (1880), 0 states have call successors, (0), 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 07:36:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1880 transitions. [2023-11-19 07:36:14,427 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1880 transitions. Word has length 193 [2023-11-19 07:36:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:14,427 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1880 transitions. [2023-11-19 07:36:14,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:36:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1880 transitions. [2023-11-19 07:36:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-19 07:36:14,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:14,433 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:14,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:36:14,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:14,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 983450283, now seen corresponding path program 1 times [2023-11-19 07:36:14,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:14,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433302262] [2023-11-19 07:36:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:14,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 287 proven. 14 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2023-11-19 07:36:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433302262] [2023-11-19 07:36:14,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433302262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44150333] [2023-11-19 07:36:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:14,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:36:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:14,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:36:14,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 287 proven. 14 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2023-11-19 07:36:15,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 287 proven. 14 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2023-11-19 07:36:15,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44150333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:15,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:15,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-19 07:36:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468567993] [2023-11-19 07:36:15,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:15,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:15,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:15,813 INFO L87 Difference]: Start difference. First operand 1211 states and 1880 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 07:36:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:15,905 INFO L93 Difference]: Finished difference Result 2577 states and 3986 transitions. [2023-11-19 07:36:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:36:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 193 [2023-11-19 07:36:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:15,914 INFO L225 Difference]: With dead ends: 2577 [2023-11-19 07:36:15,915 INFO L226 Difference]: Without dead ends: 1444 [2023-11-19 07:36:15,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 384 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:36:15,917 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 144 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:15,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 339 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2023-11-19 07:36:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1335. [2023-11-19 07:36:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.4670164917541229) internal successors, (1957), 1334 states have internal predecessors, (1957), 0 states have call successors, (0), 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 07:36:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1957 transitions. [2023-11-19 07:36:15,975 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1957 transitions. Word has length 193 [2023-11-19 07:36:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:15,976 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1957 transitions. [2023-11-19 07:36:15,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 07:36:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1957 transitions. [2023-11-19 07:36:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-19 07:36:15,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:15,982 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:16,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:16,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:16,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:16,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash -297559137, now seen corresponding path program 1 times [2023-11-19 07:36:16,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:16,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646557843] [2023-11-19 07:36:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:16,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646557843] [2023-11-19 07:36:17,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646557843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:17,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:17,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:17,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145259651] [2023-11-19 07:36:17,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:17,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:17,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:17,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:17,179 INFO L87 Difference]: Start difference. First operand 1335 states and 1957 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 07:36:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:17,417 INFO L93 Difference]: Finished difference Result 1452 states and 2146 transitions. [2023-11-19 07:36:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 194 [2023-11-19 07:36:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:17,426 INFO L225 Difference]: With dead ends: 1452 [2023-11-19 07:36:17,426 INFO L226 Difference]: Without dead ends: 1347 [2023-11-19 07:36:17,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:17,429 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 4 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:17,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:36:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2023-11-19 07:36:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1341. [2023-11-19 07:36:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.4649253731343284) internal successors, (1963), 1340 states have internal predecessors, (1963), 0 states have call successors, (0), 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 07:36:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1963 transitions. [2023-11-19 07:36:17,497 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1963 transitions. Word has length 194 [2023-11-19 07:36:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:17,498 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 1963 transitions. [2023-11-19 07:36:17,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 07:36:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1963 transitions. [2023-11-19 07:36:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-19 07:36:17,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:17,503 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:17,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:36:17,504 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:17,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2004634471, now seen corresponding path program 1 times [2023-11-19 07:36:17,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:17,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023508758] [2023-11-19 07:36:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:17,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 290 proven. 14 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2023-11-19 07:36:17,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:17,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023508758] [2023-11-19 07:36:17,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023508758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534873249] [2023-11-19 07:36:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:17,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:17,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:17,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:36:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:18,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:36:18,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 290 proven. 14 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2023-11-19 07:36:18,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 290 proven. 14 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2023-11-19 07:36:18,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534873249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:18,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:18,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-19 07:36:18,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498367841] [2023-11-19 07:36:18,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:18,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:18,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:18,627 INFO L87 Difference]: Start difference. First operand 1341 states and 1963 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 07:36:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:18,734 INFO L93 Difference]: Finished difference Result 3112 states and 4581 transitions. [2023-11-19 07:36:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:36:18,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 194 [2023-11-19 07:36:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:18,745 INFO L225 Difference]: With dead ends: 3112 [2023-11-19 07:36:18,745 INFO L226 Difference]: Without dead ends: 1830 [2023-11-19 07:36:18,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 386 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:36:18,748 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 164 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:18,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 419 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2023-11-19 07:36:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1685. [2023-11-19 07:36:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 1.4251781472684086) internal successors, (2400), 1684 states have internal predecessors, (2400), 0 states have call successors, (0), 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 07:36:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2400 transitions. [2023-11-19 07:36:18,834 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2400 transitions. Word has length 194 [2023-11-19 07:36:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:18,835 INFO L495 AbstractCegarLoop]: Abstraction has 1685 states and 2400 transitions. [2023-11-19 07:36:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 07:36:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2400 transitions. [2023-11-19 07:36:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-19 07:36:18,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:18,841 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:18,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:19,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:19,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash -774053859, now seen corresponding path program 1 times [2023-11-19 07:36:19,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:19,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606834786] [2023-11-19 07:36:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606834786] [2023-11-19 07:36:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606834786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:19,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:19,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087122148] [2023-11-19 07:36:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:19,768 INFO L87 Difference]: Start difference. First operand 1685 states and 2400 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:19,898 INFO L93 Difference]: Finished difference Result 1758 states and 2507 transitions. [2023-11-19 07:36:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2023-11-19 07:36:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:19,908 INFO L225 Difference]: With dead ends: 1758 [2023-11-19 07:36:19,909 INFO L226 Difference]: Without dead ends: 1703 [2023-11-19 07:36:19,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:19,912 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 4 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:19,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 391 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-19 07:36:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1694. [2023-11-19 07:36:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 1.4217365623154163) internal successors, (2407), 1693 states have internal predecessors, (2407), 0 states have call successors, (0), 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 07:36:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2407 transitions. [2023-11-19 07:36:20,000 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2407 transitions. Word has length 195 [2023-11-19 07:36:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:20,001 INFO L495 AbstractCegarLoop]: Abstraction has 1694 states and 2407 transitions. [2023-11-19 07:36:20,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2407 transitions. [2023-11-19 07:36:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-19 07:36:20,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:20,010 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:20,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:36:20,010 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:20,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1402734053, now seen corresponding path program 1 times [2023-11-19 07:36:20,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:20,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180489717] [2023-11-19 07:36:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:20,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180489717] [2023-11-19 07:36:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180489717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:20,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:20,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416809178] [2023-11-19 07:36:20,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:20,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:20,930 INFO L87 Difference]: Start difference. First operand 1694 states and 2407 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:36:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:21,076 INFO L93 Difference]: Finished difference Result 1836 states and 2627 transitions. [2023-11-19 07:36:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:21,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 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 196 [2023-11-19 07:36:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:21,087 INFO L225 Difference]: With dead ends: 1836 [2023-11-19 07:36:21,087 INFO L226 Difference]: Without dead ends: 1706 [2023-11-19 07:36:21,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:21,089 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 4 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:21,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2023-11-19 07:36:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1700. [2023-11-19 07:36:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 1.420247204237787) internal successors, (2413), 1699 states have internal predecessors, (2413), 0 states have call successors, (0), 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 07:36:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2413 transitions. [2023-11-19 07:36:21,179 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2413 transitions. Word has length 196 [2023-11-19 07:36:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:21,180 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2413 transitions. [2023-11-19 07:36:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:36:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2413 transitions. [2023-11-19 07:36:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-11-19 07:36:21,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:21,186 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:21,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:36:21,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:21,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2126204483, now seen corresponding path program 1 times [2023-11-19 07:36:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:21,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986104935] [2023-11-19 07:36:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:21,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:21,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986104935] [2023-11-19 07:36:21,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986104935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:21,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:21,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094999122] [2023-11-19 07:36:21,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:21,838 INFO L87 Difference]: Start difference. First operand 1700 states and 2413 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:21,974 INFO L93 Difference]: Finished difference Result 1802 states and 2563 transitions. [2023-11-19 07:36:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2023-11-19 07:36:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:21,985 INFO L225 Difference]: With dead ends: 1802 [2023-11-19 07:36:21,985 INFO L226 Difference]: Without dead ends: 1718 [2023-11-19 07:36:21,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:21,987 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 4 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:21,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 391 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2023-11-19 07:36:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1709. [2023-11-19 07:36:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 1.4168618266978923) internal successors, (2420), 1708 states have internal predecessors, (2420), 0 states have call successors, (0), 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 07:36:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2420 transitions. [2023-11-19 07:36:22,086 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2420 transitions. Word has length 197 [2023-11-19 07:36:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:22,087 INFO L495 AbstractCegarLoop]: Abstraction has 1709 states and 2420 transitions. [2023-11-19 07:36:22,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2420 transitions. [2023-11-19 07:36:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-19 07:36:22,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:22,094 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:22,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:36:22,095 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:22,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash 289711745, now seen corresponding path program 1 times [2023-11-19 07:36:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:22,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790883393] [2023-11-19 07:36:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:22,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790883393] [2023-11-19 07:36:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790883393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:22,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:22,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874336620] [2023-11-19 07:36:22,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:22,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:22,836 INFO L87 Difference]: Start difference. First operand 1709 states and 2420 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:22,975 INFO L93 Difference]: Finished difference Result 1876 states and 2671 transitions. [2023-11-19 07:36:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:22,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2023-11-19 07:36:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:22,986 INFO L225 Difference]: With dead ends: 1876 [2023-11-19 07:36:22,986 INFO L226 Difference]: Without dead ends: 1721 [2023-11-19 07:36:22,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:22,988 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 4 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:22,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-19 07:36:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1715. [2023-11-19 07:36:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 1.4154025670945158) internal successors, (2426), 1714 states have internal predecessors, (2426), 0 states have call successors, (0), 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 07:36:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2426 transitions. [2023-11-19 07:36:23,078 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2426 transitions. Word has length 198 [2023-11-19 07:36:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:23,078 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2426 transitions. [2023-11-19 07:36:23,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2426 transitions. [2023-11-19 07:36:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 07:36:23,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:23,085 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:36:23,085 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:23,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash -756381189, now seen corresponding path program 1 times [2023-11-19 07:36:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:23,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61354883] [2023-11-19 07:36:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:23,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 217 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-19 07:36:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61354883] [2023-11-19 07:36:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61354883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001058739] [2023-11-19 07:36:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:23,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:23,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:23,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:23,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:36:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:24,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:36:24,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 188 proven. 45 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2023-11-19 07:36:24,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:24,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001058739] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:24,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:24,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 7] total 8 [2023-11-19 07:36:24,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760635416] [2023-11-19 07:36:24,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:24,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:24,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:24,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:24,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:24,491 INFO L87 Difference]: Start difference. First operand 1715 states and 2426 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:24,559 INFO L93 Difference]: Finished difference Result 1818 states and 2577 transitions. [2023-11-19 07:36:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-11-19 07:36:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:24,569 INFO L225 Difference]: With dead ends: 1818 [2023-11-19 07:36:24,570 INFO L226 Difference]: Without dead ends: 1727 [2023-11-19 07:36:24,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 393 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:24,571 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:24,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2023-11-19 07:36:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1723. [2023-11-19 07:36:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 1.4152148664343787) internal successors, (2437), 1722 states have internal predecessors, (2437), 0 states have call successors, (0), 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 07:36:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2437 transitions. [2023-11-19 07:36:24,671 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2437 transitions. Word has length 199 [2023-11-19 07:36:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:24,672 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 2437 transitions. [2023-11-19 07:36:24,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2437 transitions. [2023-11-19 07:36:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 07:36:24,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:24,678 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:24,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:24,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:24,896 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:24,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash -333679363, now seen corresponding path program 1 times [2023-11-19 07:36:24,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615817901] [2023-11-19 07:36:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:24,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615817901] [2023-11-19 07:36:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615817901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:25,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:36:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288462922] [2023-11-19 07:36:25,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:25,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:25,570 INFO L87 Difference]: Start difference. First operand 1723 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:25,740 INFO L93 Difference]: Finished difference Result 1800 states and 2548 transitions. [2023-11-19 07:36:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-11-19 07:36:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:25,751 INFO L225 Difference]: With dead ends: 1800 [2023-11-19 07:36:25,751 INFO L226 Difference]: Without dead ends: 1750 [2023-11-19 07:36:25,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:25,753 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 6 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:25,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 392 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2023-11-19 07:36:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1735. [2023-11-19 07:36:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 1.4123414071510958) internal successors, (2449), 1734 states have internal predecessors, (2449), 0 states have call successors, (0), 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 07:36:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2449 transitions. [2023-11-19 07:36:25,838 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2449 transitions. Word has length 199 [2023-11-19 07:36:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:25,839 INFO L495 AbstractCegarLoop]: Abstraction has 1735 states and 2449 transitions. [2023-11-19 07:36:25,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2449 transitions. [2023-11-19 07:36:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 07:36:25,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:25,846 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:25,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 07:36:25,846 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:25,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash -920485377, now seen corresponding path program 1 times [2023-11-19 07:36:25,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:25,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148073693] [2023-11-19 07:36:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 217 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-19 07:36:26,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148073693] [2023-11-19 07:36:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148073693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076740436] [2023-11-19 07:36:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:26,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:26,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:26,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:36:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:27,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:36:27,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:27,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076740436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:27,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:36:27,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-19 07:36:27,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197115060] [2023-11-19 07:36:27,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:27,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:27,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:27,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:36:27,135 INFO L87 Difference]: Start difference. First operand 1735 states and 2449 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:27,310 INFO L93 Difference]: Finished difference Result 1758 states and 2478 transitions. [2023-11-19 07:36:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:27,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-11-19 07:36:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:27,320 INFO L225 Difference]: With dead ends: 1758 [2023-11-19 07:36:27,321 INFO L226 Difference]: Without dead ends: 1749 [2023-11-19 07:36:27,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:36:27,323 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 58 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:27,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 326 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2023-11-19 07:36:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1741. [2023-11-19 07:36:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 1.4126436781609195) internal successors, (2458), 1740 states have internal predecessors, (2458), 0 states have call successors, (0), 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 07:36:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2458 transitions. [2023-11-19 07:36:27,418 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2458 transitions. Word has length 199 [2023-11-19 07:36:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:27,419 INFO L495 AbstractCegarLoop]: Abstraction has 1741 states and 2458 transitions. [2023-11-19 07:36:27,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2458 transitions. [2023-11-19 07:36:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 07:36:27,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:27,425 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:27,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 07:36:27,640 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:27,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -863227075, now seen corresponding path program 1 times [2023-11-19 07:36:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854063372] [2023-11-19 07:36:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 217 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-19 07:36:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854063372] [2023-11-19 07:36:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854063372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323470138] [2023-11-19 07:36:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:28,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:28,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:28,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:36:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:28,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:36:28,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:28,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:28,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323470138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:28,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:36:28,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 07:36:28,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382224435] [2023-11-19 07:36:28,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:28,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:36:28,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:36:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:28,888 INFO L87 Difference]: Start difference. First operand 1741 states and 2458 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:28,999 INFO L93 Difference]: Finished difference Result 1783 states and 2516 transitions. [2023-11-19 07:36:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-11-19 07:36:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:29,012 INFO L225 Difference]: With dead ends: 1783 [2023-11-19 07:36:29,012 INFO L226 Difference]: Without dead ends: 1762 [2023-11-19 07:36:29,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:29,017 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 5 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:29,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 293 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2023-11-19 07:36:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1753. [2023-11-19 07:36:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 1.4098173515981736) internal successors, (2470), 1752 states have internal predecessors, (2470), 0 states have call successors, (0), 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 07:36:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2470 transitions. [2023-11-19 07:36:29,102 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2470 transitions. Word has length 199 [2023-11-19 07:36:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:29,103 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2470 transitions. [2023-11-19 07:36:29,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2470 transitions. [2023-11-19 07:36:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 07:36:29,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:29,109 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:29,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:29,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:29,323 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:29,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1729832003, now seen corresponding path program 1 times [2023-11-19 07:36:29,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153874655] [2023-11-19 07:36:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:29,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 217 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-19 07:36:30,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:30,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153874655] [2023-11-19 07:36:30,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153874655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:30,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791670815] [2023-11-19 07:36:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:30,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:30,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:30,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:36:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:30,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:36:30,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 188 proven. 45 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2023-11-19 07:36:30,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 217 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-19 07:36:31,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791670815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:31,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:31,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2023-11-19 07:36:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40421431] [2023-11-19 07:36:31,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:31,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:36:31,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:36:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:36:31,338 INFO L87 Difference]: Start difference. First operand 1753 states and 2470 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 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 07:36:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:32,302 INFO L93 Difference]: Finished difference Result 1992 states and 2792 transitions. [2023-11-19 07:36:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:36:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 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 199 [2023-11-19 07:36:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:32,324 INFO L225 Difference]: With dead ends: 1992 [2023-11-19 07:36:32,331 INFO L226 Difference]: Without dead ends: 1833 [2023-11-19 07:36:32,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 395 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:36:32,334 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 236 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:32,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 853 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:36:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2023-11-19 07:36:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1726. [2023-11-19 07:36:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.4069565217391304) internal successors, (2427), 1725 states have internal predecessors, (2427), 0 states have call successors, (0), 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 07:36:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2427 transitions. [2023-11-19 07:36:32,453 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2427 transitions. Word has length 199 [2023-11-19 07:36:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:32,454 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 2427 transitions. [2023-11-19 07:36:32,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 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 07:36:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2427 transitions. [2023-11-19 07:36:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:36:32,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:32,464 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:32,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:32,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-19 07:36:32,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:32,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash -195609273, now seen corresponding path program 1 times [2023-11-19 07:36:32,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:32,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424498012] [2023-11-19 07:36:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:32,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2023-11-19 07:36:33,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424498012] [2023-11-19 07:36:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424498012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664498918] [2023-11-19 07:36:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:33,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:33,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:33,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:36:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:33,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:36:33,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 149 proven. 45 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-11-19 07:36:33,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664498918] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:33,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 7] total 8 [2023-11-19 07:36:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015609376] [2023-11-19 07:36:33,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:33,943 INFO L87 Difference]: Start difference. First operand 1726 states and 2427 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2023-11-19 07:36:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:34,027 INFO L93 Difference]: Finished difference Result 1902 states and 2675 transitions. [2023-11-19 07:36:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 200 [2023-11-19 07:36:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:34,033 INFO L225 Difference]: With dead ends: 1902 [2023-11-19 07:36:34,034 INFO L226 Difference]: Without dead ends: 1735 [2023-11-19 07:36:34,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 395 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:36:34,035 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:34,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-11-19 07:36:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1732. [2023-11-19 07:36:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 1.4067013287117274) internal successors, (2435), 1731 states have internal predecessors, (2435), 0 states have call successors, (0), 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 07:36:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2435 transitions. [2023-11-19 07:36:34,106 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2435 transitions. Word has length 200 [2023-11-19 07:36:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:34,107 INFO L495 AbstractCegarLoop]: Abstraction has 1732 states and 2435 transitions. [2023-11-19 07:36:34,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2023-11-19 07:36:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2435 transitions. [2023-11-19 07:36:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:36:34,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:34,114 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:34,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 07:36:34,336 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:34,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1855374725, now seen corresponding path program 1 times [2023-11-19 07:36:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367347573] [2023-11-19 07:36:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2023-11-19 07:36:35,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:35,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367347573] [2023-11-19 07:36:35,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367347573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:35,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83475736] [2023-11-19 07:36:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:35,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:35,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:35,112 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:35,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:36:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:35,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:36:35,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-11-19 07:36:35,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83475736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:35,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:36:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-19 07:36:35,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388030226] [2023-11-19 07:36:35,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:35,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:35,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:36:35,351 INFO L87 Difference]: Start difference. First operand 1732 states and 2435 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2023-11-19 07:36:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:35,479 INFO L93 Difference]: Finished difference Result 1868 states and 2623 transitions. [2023-11-19 07:36:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:36:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 200 [2023-11-19 07:36:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:35,484 INFO L225 Difference]: With dead ends: 1868 [2023-11-19 07:36:35,484 INFO L226 Difference]: Without dead ends: 1752 [2023-11-19 07:36:35,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:36:35,486 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 5 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:35,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 391 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2023-11-19 07:36:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1741. [2023-11-19 07:36:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 1.4045977011494253) internal successors, (2444), 1740 states have internal predecessors, (2444), 0 states have call successors, (0), 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 07:36:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2444 transitions. [2023-11-19 07:36:35,561 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2444 transitions. Word has length 200 [2023-11-19 07:36:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:35,562 INFO L495 AbstractCegarLoop]: Abstraction has 1741 states and 2444 transitions. [2023-11-19 07:36:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2023-11-19 07:36:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2444 transitions. [2023-11-19 07:36:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:36:35,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:35,569 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:35,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:35,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 07:36:35,788 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:35,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2016890745, now seen corresponding path program 1 times [2023-11-19 07:36:35,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:35,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340978432] [2023-11-19 07:36:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:35,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2023-11-19 07:36:36,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340978432] [2023-11-19 07:36:36,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340978432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:36,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830513993] [2023-11-19 07:36:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:36,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:36,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:36,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:36,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3e891c5-ff48-451f-866e-46cf2084177a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:36:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:36,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:36:36,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 149 proven. 45 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-11-19 07:36:37,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2023-11-19 07:36:37,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830513993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:37,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:36:37,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2023-11-19 07:36:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369164769] [2023-11-19 07:36:37,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:36:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:36:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:36:37,546 INFO L87 Difference]: Start difference. First operand 1741 states and 2444 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)