./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:08,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:08,475 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:08,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:08,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:08,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:08,524 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:08,525 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:08,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:08,531 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:08,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:08,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:08,534 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:08,536 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:08,536 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:08,536 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:08,537 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:08,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:08,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:08,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:08,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:08,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:08,540 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:08,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:08,541 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:08,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:08,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:08,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:08,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:08,544 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:08,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:08,545 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:08,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:08,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:08,546 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:08,547 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:08,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:08,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:08,547 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:08,548 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_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 [2023-11-06 21:14:08,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:08,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:08,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:08,876 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:08,877 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:08,878 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2023-11-06 21:14:12,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:12,570 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:12,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2023-11-06 21:14:12,600 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/data/a24634ab7/13db1103fc7c4a26bdffc0abd6f4dcc6/FLAG605e008a3 [2023-11-06 21:14:12,621 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/data/a24634ab7/13db1103fc7c4a26bdffc0abd6f4dcc6 [2023-11-06 21:14:12,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:12,629 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:12,632 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:12,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:12,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:12,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:12" (1/1) ... [2023-11-06 21:14:12,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141b8078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:12, skipping insertion in model container [2023-11-06 21:14:12,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:12" (1/1) ... [2023-11-06 21:14:12,783 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:13,073 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_b6223b59-c324-4c1b-b76b-876502f8315b/sv-benchmarks/c/eca-rers2012/Problem17_label04.c[3138,3151] [2023-11-06 21:14:13,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:13,793 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:13,819 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_b6223b59-c324-4c1b-b76b-876502f8315b/sv-benchmarks/c/eca-rers2012/Problem17_label04.c[3138,3151] [2023-11-06 21:14:14,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:14,202 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:14,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14 WrapperNode [2023-11-06 21:14:14,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:14,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:14,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:14,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:14,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,572 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2612 [2023-11-06 21:14:14,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:14,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:14,573 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:14,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:14,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,614 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,614 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,869 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:14,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:14,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:14,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:14,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (1/1) ... [2023-11-06 21:14:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:14,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:14,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:14,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:15,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:15,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:15,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:15,093 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:15,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:20,132 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:20,150 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:20,151 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:14:20,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:20 BoogieIcfgContainer [2023-11-06 21:14:20,155 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:20,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:20,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:20,162 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:20,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:12" (1/3) ... [2023-11-06 21:14:20,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68691232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:20, skipping insertion in model container [2023-11-06 21:14:20,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:14" (2/3) ... [2023-11-06 21:14:20,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68691232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:20, skipping insertion in model container [2023-11-06 21:14:20,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:20" (3/3) ... [2023-11-06 21:14:20,169 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2023-11-06 21:14:20,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:20,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:20,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:20,287 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2feff3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:20,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:14:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 21:14:20,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:20,304 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] [2023-11-06 21:14:20,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:20,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2023-11-06 21:14:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:20,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238406400] [2023-11-06 21:14:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238406400] [2023-11-06 21:14:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238406400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:20,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698420761] [2023-11-06 21:14:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:20,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:20,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:20,640 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:24,591 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2023-11-06 21:14:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2023-11-06 21:14:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:24,615 INFO L225 Difference]: With dead ends: 1644 [2023-11-06 21:14:24,615 INFO L226 Difference]: Without dead ends: 977 [2023-11-06 21:14:24,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:24,625 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 468 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:24,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-06 21:14:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-11-06 21:14:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2023-11-06 21:14:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2023-11-06 21:14:24,725 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 20 [2023-11-06 21:14:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:24,725 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2023-11-06 21:14:24,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2023-11-06 21:14:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-06 21:14:24,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:24,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:24,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:14:24,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:24,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -560555142, now seen corresponding path program 1 times [2023-11-06 21:14:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:24,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558165193] [2023-11-06 21:14:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558165193] [2023-11-06 21:14:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558165193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741643064] [2023-11-06 21:14:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:25,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:25,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:25,032 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:28,469 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2023-11-06 21:14:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2023-11-06 21:14:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:28,482 INFO L225 Difference]: With dead ends: 2813 [2023-11-06 21:14:28,483 INFO L226 Difference]: Without dead ends: 1844 [2023-11-06 21:14:28,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:28,487 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:28,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 21:14:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2023-11-06 21:14:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2023-11-06 21:14:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2023-11-06 21:14:28,546 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 87 [2023-11-06 21:14:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:28,547 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2023-11-06 21:14:28,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2023-11-06 21:14:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-06 21:14:28,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:28,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:14:28,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:28,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 405382798, now seen corresponding path program 1 times [2023-11-06 21:14:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:28,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616586813] [2023-11-06 21:14:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616586813] [2023-11-06 21:14:28,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616586813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:28,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:28,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:28,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75441711] [2023-11-06 21:14:28,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:28,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:28,780 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:32,230 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2023-11-06 21:14:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:32,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2023-11-06 21:14:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:32,249 INFO L225 Difference]: With dead ends: 4552 [2023-11-06 21:14:32,249 INFO L226 Difference]: Without dead ends: 2713 [2023-11-06 21:14:32,252 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 [2023-11-06 21:14:32,254 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 487 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:32,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 21:14:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2023-11-06 21:14:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2023-11-06 21:14:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2023-11-06 21:14:32,339 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 90 [2023-11-06 21:14:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:32,341 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2023-11-06 21:14:32,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2023-11-06 21:14:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-06 21:14:32,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:32,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:14:32,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:32,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:32,348 INFO L85 PathProgramCache]: Analyzing trace with hash -41455991, now seen corresponding path program 1 times [2023-11-06 21:14:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:32,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116866629] [2023-11-06 21:14:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:32,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 21:14:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116866629] [2023-11-06 21:14:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116866629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:32,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:32,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:32,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108402106] [2023-11-06 21:14:32,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:32,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:32,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:32,659 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:35,516 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2023-11-06 21:14:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 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 159 [2023-11-06 21:14:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:35,546 INFO L225 Difference]: With dead ends: 7984 [2023-11-06 21:14:35,546 INFO L226 Difference]: Without dead ends: 4421 [2023-11-06 21:14:35,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:35,563 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:35,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-06 21:14:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2023-11-06 21:14:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2023-11-06 21:14:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2023-11-06 21:14:35,681 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 159 [2023-11-06 21:14:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:35,681 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2023-11-06 21:14:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2023-11-06 21:14:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-06 21:14:35,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:35,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:35,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:14:35,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:35,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash -695550011, now seen corresponding path program 1 times [2023-11-06 21:14:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:35,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547667620] [2023-11-06 21:14:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:35,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547667620] [2023-11-06 21:14:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547667620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:36,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265871446] [2023-11-06 21:14:36,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:36,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:36,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:36,069 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:38,889 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2023-11-06 21:14:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:38,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2023-11-06 21:14:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:38,963 INFO L225 Difference]: With dead ends: 9273 [2023-11-06 21:14:38,965 INFO L226 Difference]: Without dead ends: 5704 [2023-11-06 21:14:38,970 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 [2023-11-06 21:14:38,971 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:38,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 21:14:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2023-11-06 21:14:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2023-11-06 21:14:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2023-11-06 21:14:39,110 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 172 [2023-11-06 21:14:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:39,112 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2023-11-06 21:14:39,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2023-11-06 21:14:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:14:39,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:39,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:39,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:14:39,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:39,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -487366976, now seen corresponding path program 1 times [2023-11-06 21:14:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:39,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325741326] [2023-11-06 21:14:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 21:14:39,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:39,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325741326] [2023-11-06 21:14:39,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325741326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:39,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:39,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:39,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155792227] [2023-11-06 21:14:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:39,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:39,343 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:42,022 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2023-11-06 21:14:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:42,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-11-06 21:14:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:42,078 INFO L225 Difference]: With dead ends: 14376 [2023-11-06 21:14:42,078 INFO L226 Difference]: Without dead ends: 8673 [2023-11-06 21:14:42,088 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 [2023-11-06 21:14:42,089 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 431 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:42,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 21:14:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2023-11-06 21:14:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2023-11-06 21:14:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2023-11-06 21:14:42,369 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 174 [2023-11-06 21:14:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:42,370 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2023-11-06 21:14:42,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2023-11-06 21:14:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 21:14:42,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:42,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:42,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:14:42,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:42,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1861125085, now seen corresponding path program 1 times [2023-11-06 21:14:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:42,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211308364] [2023-11-06 21:14:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 21:14:42,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211308364] [2023-11-06 21:14:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211308364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:42,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:42,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479340109] [2023-11-06 21:14:42,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:42,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:42,892 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:46,087 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2023-11-06 21:14:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 252 [2023-11-06 21:14:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:46,139 INFO L225 Difference]: With dead ends: 13935 [2023-11-06 21:14:46,139 INFO L226 Difference]: Without dead ends: 7832 [2023-11-06 21:14:46,147 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 [2023-11-06 21:14:46,150 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:46,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 21:14:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2023-11-06 21:14:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2023-11-06 21:14:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2023-11-06 21:14:46,430 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 252 [2023-11-06 21:14:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:46,432 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2023-11-06 21:14:46,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2023-11-06 21:14:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-06 21:14:46,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:46,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:46,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:14:46,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:46,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 625857440, now seen corresponding path program 1 times [2023-11-06 21:14:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:46,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234146192] [2023-11-06 21:14:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:46,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 21:14:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234146192] [2023-11-06 21:14:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234146192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:46,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114274543] [2023-11-06 21:14:46,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:46,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:46,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:46,844 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:49,619 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2023-11-06 21:14:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2023-11-06 21:14:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:49,649 INFO L225 Difference]: With dead ends: 19038 [2023-11-06 21:14:49,649 INFO L226 Difference]: Without dead ends: 11213 [2023-11-06 21:14:49,659 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 [2023-11-06 21:14:49,659 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:49,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 21:14:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2023-11-06 21:14:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2023-11-06 21:14:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2023-11-06 21:14:49,849 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 257 [2023-11-06 21:14:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:49,850 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2023-11-06 21:14:49,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2023-11-06 21:14:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-06 21:14:49,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:49,857 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:14:49,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:49,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash 680789272, now seen corresponding path program 1 times [2023-11-06 21:14:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:49,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893240143] [2023-11-06 21:14:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:49,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-06 21:14:50,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:50,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893240143] [2023-11-06 21:14:50,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893240143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:50,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:50,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771809812] [2023-11-06 21:14:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:50,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:50,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:50,332 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:53,262 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2023-11-06 21:14:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 275 [2023-11-06 21:14:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:53,290 INFO L225 Difference]: With dead ends: 24567 [2023-11-06 21:14:53,290 INFO L226 Difference]: Without dead ends: 13774 [2023-11-06 21:14:53,301 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 [2023-11-06 21:14:53,302 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:53,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-06 21:14:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2023-11-06 21:14:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2023-11-06 21:14:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2023-11-06 21:14:53,520 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 275 [2023-11-06 21:14:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:53,523 INFO L495 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2023-11-06 21:14:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2023-11-06 21:14:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-11-06 21:14:53,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:53,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:14:53,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:53,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1540121653, now seen corresponding path program 1 times [2023-11-06 21:14:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:53,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350522567] [2023-11-06 21:14:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:53,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-06 21:14:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350522567] [2023-11-06 21:14:54,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350522567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:54,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:54,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:14:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121515543] [2023-11-06 21:14:54,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:54,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:54,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:54,136 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:59,980 INFO L93 Difference]: Finished difference Result 46351 states and 52889 transitions. [2023-11-06 21:14:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2023-11-06 21:14:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:00,062 INFO L225 Difference]: With dead ends: 46351 [2023-11-06 21:15:00,062 INFO L226 Difference]: Without dead ends: 32154 [2023-11-06 21:15:00,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:15:00,077 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 897 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:00,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 336 Invalid, 3239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-06 21:15:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32154 states. [2023-11-06 21:15:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32154 to 31677. [2023-11-06 21:15:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31677 states, 31676 states have (on average 1.1246685187523677) internal successors, (35625), 31676 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31677 states to 31677 states and 35625 transitions. [2023-11-06 21:15:00,615 INFO L78 Accepts]: Start accepts. Automaton has 31677 states and 35625 transitions. Word has length 280 [2023-11-06 21:15:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:00,616 INFO L495 AbstractCegarLoop]: Abstraction has 31677 states and 35625 transitions. [2023-11-06 21:15:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 31677 states and 35625 transitions. [2023-11-06 21:15:00,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 21:15:00,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:00,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:15:00,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:00,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2068453589, now seen corresponding path program 1 times [2023-11-06 21:15:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:00,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578635317] [2023-11-06 21:15:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-06 21:15:01,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:01,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578635317] [2023-11-06 21:15:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578635317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:01,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:01,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:01,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208811852] [2023-11-06 21:15:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:01,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:01,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:01,271 INFO L87 Difference]: Start difference. First operand 31677 states and 35625 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:04,711 INFO L93 Difference]: Finished difference Result 76998 states and 86991 transitions. [2023-11-06 21:15:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:04,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 309 [2023-11-06 21:15:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:04,799 INFO L225 Difference]: With dead ends: 76998 [2023-11-06 21:15:04,799 INFO L226 Difference]: Without dead ends: 44894 [2023-11-06 21:15:04,825 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 [2023-11-06 21:15:04,826 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 464 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:04,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 426 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 21:15:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44894 states. [2023-11-06 21:15:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44894 to 43162. [2023-11-06 21:15:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43162 states, 43161 states have (on average 1.1074117837862885) internal successors, (47797), 43161 states have internal predecessors, (47797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43162 states to 43162 states and 47797 transitions. [2023-11-06 21:15:05,816 INFO L78 Accepts]: Start accepts. Automaton has 43162 states and 47797 transitions. Word has length 309 [2023-11-06 21:15:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:05,817 INFO L495 AbstractCegarLoop]: Abstraction has 43162 states and 47797 transitions. [2023-11-06 21:15:05,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 43162 states and 47797 transitions. [2023-11-06 21:15:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-06 21:15:05,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:05,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:05,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:15:05,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:05,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 856418989, now seen corresponding path program 1 times [2023-11-06 21:15:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617865836] [2023-11-06 21:15:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:05,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 217 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617865836] [2023-11-06 21:15:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617865836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716672281] [2023-11-06 21:15:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:06,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:06,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:06,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:15:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:07,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:15:07,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 222 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:15:07,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 222 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:15:09,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716672281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:09,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:09,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2023-11-06 21:15:09,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5278541] [2023-11-06 21:15:09,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:09,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:15:09,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:15:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:15:09,283 INFO L87 Difference]: Start difference. First operand 43162 states and 47797 transitions. Second operand has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:30,153 INFO L93 Difference]: Finished difference Result 151118 states and 167179 transitions. [2023-11-06 21:15:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:15:30,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 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 315 [2023-11-06 21:15:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:30,342 INFO L225 Difference]: With dead ends: 151118 [2023-11-06 21:15:30,343 INFO L226 Difference]: Without dead ends: 103699 [2023-11-06 21:15:30,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:15:30,384 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 9100 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 10631 mSolverCounterSat, 2454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9100 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 13085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2454 IncrementalHoareTripleChecker+Valid, 10631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:30,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9100 Valid, 454 Invalid, 13085 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2454 Valid, 10631 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2023-11-06 21:15:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103699 states. [2023-11-06 21:15:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103699 to 85728. [2023-11-06 21:15:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85728 states, 85727 states have (on average 1.102324821818097) internal successors, (94499), 85727 states have internal predecessors, (94499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85728 states to 85728 states and 94499 transitions. [2023-11-06 21:15:32,263 INFO L78 Accepts]: Start accepts. Automaton has 85728 states and 94499 transitions. Word has length 315 [2023-11-06 21:15:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:32,264 INFO L495 AbstractCegarLoop]: Abstraction has 85728 states and 94499 transitions. [2023-11-06 21:15:32,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 85728 states and 94499 transitions. [2023-11-06 21:15:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-06 21:15:32,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:32,614 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:32,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:32,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:15:32,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:32,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1212771369, now seen corresponding path program 1 times [2023-11-06 21:15:32,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:32,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101081296] [2023-11-06 21:15:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-06 21:15:33,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:33,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101081296] [2023-11-06 21:15:33,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101081296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:33,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893948148] [2023-11-06 21:15:33,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:33,474 INFO L87 Difference]: Start difference. First operand 85728 states and 94499 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:36,677 INFO L93 Difference]: Finished difference Result 167194 states and 184279 transitions. [2023-11-06 21:15:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2023-11-06 21:15:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:36,834 INFO L225 Difference]: With dead ends: 167194 [2023-11-06 21:15:36,834 INFO L226 Difference]: Without dead ends: 81467 [2023-11-06 21:15:36,871 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 [2023-11-06 21:15:36,872 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 481 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:36,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 724 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 21:15:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81467 states. [2023-11-06 21:15:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81467 to 80186. [2023-11-06 21:15:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80186 states, 80185 states have (on average 1.0767475213568622) internal successors, (86339), 80185 states have internal predecessors, (86339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80186 states to 80186 states and 86339 transitions. [2023-11-06 21:15:38,820 INFO L78 Accepts]: Start accepts. Automaton has 80186 states and 86339 transitions. Word has length 389 [2023-11-06 21:15:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:38,821 INFO L495 AbstractCegarLoop]: Abstraction has 80186 states and 86339 transitions. [2023-11-06 21:15:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 80186 states and 86339 transitions. [2023-11-06 21:15:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-06 21:15:38,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:38,833 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:38,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:15:38,834 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:38,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1113669516, now seen corresponding path program 1 times [2023-11-06 21:15:38,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:38,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909387246] [2023-11-06 21:15:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:38,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 487 proven. 80 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:15:40,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:40,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909387246] [2023-11-06 21:15:40,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909387246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:40,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356016960] [2023-11-06 21:15:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:40,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:40,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:40,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:40,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:15:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:41,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:15:41,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:15:41,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:41,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356016960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:41,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:41,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-06 21:15:41,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29675141] [2023-11-06 21:15:41,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:41,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:41,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:41,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:41,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:41,706 INFO L87 Difference]: Start difference. First operand 80186 states and 86339 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:45,501 INFO L93 Difference]: Finished difference Result 160795 states and 173102 transitions. [2023-11-06 21:15:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:45,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 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 397 [2023-11-06 21:15:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:45,615 INFO L225 Difference]: With dead ends: 160795 [2023-11-06 21:15:45,615 INFO L226 Difference]: Without dead ends: 80611 [2023-11-06 21:15:45,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:45,654 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 814 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2144 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:45,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 344 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2144 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 21:15:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80611 states. [2023-11-06 21:15:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80611 to 80186. [2023-11-06 21:15:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80186 states, 80185 states have (on average 1.07579971316331) internal successors, (86263), 80185 states have internal predecessors, (86263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80186 states to 80186 states and 86263 transitions. [2023-11-06 21:15:47,674 INFO L78 Accepts]: Start accepts. Automaton has 80186 states and 86263 transitions. Word has length 397 [2023-11-06 21:15:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:47,675 INFO L495 AbstractCegarLoop]: Abstraction has 80186 states and 86263 transitions. [2023-11-06 21:15:47,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 80186 states and 86263 transitions. [2023-11-06 21:15:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-11-06 21:15:47,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:47,685 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:47,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:47,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:15:47,892 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:47,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1887246170, now seen corresponding path program 1 times [2023-11-06 21:15:47,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:47,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098913549] [2023-11-06 21:15:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:47,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 471 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:15:49,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:49,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098913549] [2023-11-06 21:15:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098913549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2258050] [2023-11-06 21:15:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:49,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:49,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:15:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:49,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:15:49,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:15:50,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:50,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2258050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:50,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:50,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-06 21:15:50,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378585058] [2023-11-06 21:15:50,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:50,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:50,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:50,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:50,239 INFO L87 Difference]: Start difference. First operand 80186 states and 86263 transitions. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:54,205 INFO L93 Difference]: Finished difference Result 163349 states and 175712 transitions. [2023-11-06 21:15:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 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 398 [2023-11-06 21:15:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:54,297 INFO L225 Difference]: With dead ends: 163349 [2023-11-06 21:15:54,297 INFO L226 Difference]: Without dead ends: 83165 [2023-11-06 21:15:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:54,330 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 830 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 346 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 21:15:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83165 states. [2023-11-06 21:15:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83165 to 82315. [2023-11-06 21:15:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82315 states, 82314 states have (on average 1.075272736108074) internal successors, (88510), 82314 states have internal predecessors, (88510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82315 states to 82315 states and 88510 transitions. [2023-11-06 21:15:55,654 INFO L78 Accepts]: Start accepts. Automaton has 82315 states and 88510 transitions. Word has length 398 [2023-11-06 21:15:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:55,654 INFO L495 AbstractCegarLoop]: Abstraction has 82315 states and 88510 transitions. [2023-11-06 21:15:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 82315 states and 88510 transitions. [2023-11-06 21:15:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2023-11-06 21:15:55,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:55,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:55,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:15:55,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:55,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1285179847, now seen corresponding path program 1 times [2023-11-06 21:15:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:55,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421484435] [2023-11-06 21:15:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 35 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:58,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421484435] [2023-11-06 21:15:58,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421484435] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643924589] [2023-11-06 21:15:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:58,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:58,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:58,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:15:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:58,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:15:58,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 35 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:59,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643924589] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:59,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 10 [2023-11-06 21:15:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311493953] [2023-11-06 21:15:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:59,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:15:59,954 INFO L87 Difference]: Start difference. First operand 82315 states and 88510 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:05,583 INFO L93 Difference]: Finished difference Result 188003 states and 202644 transitions. [2023-11-06 21:16:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:16:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 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 406 [2023-11-06 21:16:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:05,799 INFO L225 Difference]: With dead ends: 188003 [2023-11-06 21:16:05,799 INFO L226 Difference]: Without dead ends: 103988 [2023-11-06 21:16:05,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:16:05,868 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 675 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:05,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 127 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 21:16:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103988 states. [2023-11-06 21:16:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103988 to 102279. [2023-11-06 21:16:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102279 states, 102278 states have (on average 1.0687146795987408) internal successors, (109306), 102278 states have internal predecessors, (109306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102279 states to 102279 states and 109306 transitions. [2023-11-06 21:16:07,832 INFO L78 Accepts]: Start accepts. Automaton has 102279 states and 109306 transitions. Word has length 406 [2023-11-06 21:16:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:07,833 INFO L495 AbstractCegarLoop]: Abstraction has 102279 states and 109306 transitions. [2023-11-06 21:16:07,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 102279 states and 109306 transitions. [2023-11-06 21:16:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-11-06 21:16:07,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:07,840 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:07,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:08,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:16:08,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:08,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash 601873947, now seen corresponding path program 1 times [2023-11-06 21:16:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800739881] [2023-11-06 21:16:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:08,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 308 proven. 181 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-06 21:16:09,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:09,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800739881] [2023-11-06 21:16:09,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800739881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:09,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678650154] [2023-11-06 21:16:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:09,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:09,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:09,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:09,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:16:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:09,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:16:09,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-06 21:16:10,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:16:10,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678650154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:10,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:16:10,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-06 21:16:10,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444978078] [2023-11-06 21:16:10,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:16:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:16:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:16:10,407 INFO L87 Difference]: Start difference. First operand 102279 states and 109306 transitions. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:16,254 INFO L93 Difference]: Finished difference Result 242880 states and 259182 transitions. [2023-11-06 21:16:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:16:16,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 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 445 [2023-11-06 21:16:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:16,428 INFO L225 Difference]: With dead ends: 242880 [2023-11-06 21:16:16,428 INFO L226 Difference]: Without dead ends: 140603 [2023-11-06 21:16:16,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:16:16,806 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 739 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:16,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 145 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-06 21:16:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140603 states. [2023-11-06 21:16:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140603 to 133368. [2023-11-06 21:16:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133368 states, 133367 states have (on average 1.0642137860190302) internal successors, (141931), 133367 states have internal predecessors, (141931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133368 states to 133368 states and 141931 transitions. [2023-11-06 21:16:19,581 INFO L78 Accepts]: Start accepts. Automaton has 133368 states and 141931 transitions. Word has length 445 [2023-11-06 21:16:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:19,582 INFO L495 AbstractCegarLoop]: Abstraction has 133368 states and 141931 transitions. [2023-11-06 21:16:19,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 133368 states and 141931 transitions. [2023-11-06 21:16:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-11-06 21:16:19,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:19,592 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6223b59-c324-4c1b-b76b-876502f8315b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:16:19,798 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:19,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -566529451, now seen corresponding path program 1 times [2023-11-06 21:16:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:19,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120946657] [2023-11-06 21:16:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 497 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-06 21:16:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:20,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120946657] [2023-11-06 21:16:20,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120946657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:20,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:20,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:20,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022461476] [2023-11-06 21:16:20,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:20,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:20,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:20,607 INFO L87 Difference]: Start difference. First operand 133368 states and 141931 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:24,674 INFO L93 Difference]: Finished difference Result 285898 states and 304332 transitions. [2023-11-06 21:16:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 449 [2023-11-06 21:16:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:24,852 INFO L225 Difference]: With dead ends: 285898 [2023-11-06 21:16:24,853 INFO L226 Difference]: Without dead ends: 152106 [2023-11-06 21:16:25,324 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 [2023-11-06 21:16:25,334 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 304 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:25,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 777 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 21:16:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152106 states. [2023-11-06 21:16:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152106 to 146986. [2023-11-06 21:16:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146986 states, 146985 states have (on average 1.057665748205599) internal successors, (155461), 146985 states have internal predecessors, (155461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146986 states to 146986 states and 155461 transitions. [2023-11-06 21:16:28,737 INFO L78 Accepts]: Start accepts. Automaton has 146986 states and 155461 transitions. Word has length 449 [2023-11-06 21:16:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 146986 states and 155461 transitions. [2023-11-06 21:16:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 146986 states and 155461 transitions. [2023-11-06 21:16:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-06 21:16:28,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:28,747 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:28,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 21:16:28,748 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:28,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash -461437510, now seen corresponding path program 1 times [2023-11-06 21:16:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59603359] [2023-11-06 21:16:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:28,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 497 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-06 21:16:29,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59603359] [2023-11-06 21:16:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59603359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:29,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:29,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116132151] [2023-11-06 21:16:29,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:29,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:29,314 INFO L87 Difference]: Start difference. First operand 146986 states and 155461 transitions. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:33,431 INFO L93 Difference]: Finished difference Result 310589 states and 329007 transitions. [2023-11-06 21:16:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 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 471 [2023-11-06 21:16:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:33,639 INFO L225 Difference]: With dead ends: 310589 [2023-11-06 21:16:33,639 INFO L226 Difference]: Without dead ends: 163178 [2023-11-06 21:16:33,705 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 [2023-11-06 21:16:33,706 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 306 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:33,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 361 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-06 21:16:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163178 states. [2023-11-06 21:16:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163178 to 145709. [2023-11-06 21:16:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145709 states, 145708 states have (on average 1.0554465094572707) internal successors, (153787), 145708 states have internal predecessors, (153787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145709 states to 145709 states and 153787 transitions. [2023-11-06 21:16:36,953 INFO L78 Accepts]: Start accepts. Automaton has 145709 states and 153787 transitions. Word has length 471 [2023-11-06 21:16:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:36,953 INFO L495 AbstractCegarLoop]: Abstraction has 145709 states and 153787 transitions. [2023-11-06 21:16:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 145709 states and 153787 transitions. [2023-11-06 21:16:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-06 21:16:36,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:36,961 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:36,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 21:16:36,961 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:36,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1120149885, now seen corresponding path program 1 times [2023-11-06 21:16:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:36,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42536180] [2023-11-06 21:16:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-06 21:16:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42536180] [2023-11-06 21:16:38,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42536180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:38,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:38,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:16:38,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047084437] [2023-11-06 21:16:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:38,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:16:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:16:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:16:38,279 INFO L87 Difference]: Start difference. First operand 145709 states and 153787 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:43,794 INFO L93 Difference]: Finished difference Result 337449 states and 356556 transitions. [2023-11-06 21:16:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:16:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 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 479 [2023-11-06 21:16:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:44,044 INFO L225 Difference]: With dead ends: 337449 [2023-11-06 21:16:44,044 INFO L226 Difference]: Without dead ends: 191742 [2023-11-06 21:16:44,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:16:44,112 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 690 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:44,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 154 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 21:16:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191742 states.