./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label18.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d08db41ae0d7ec8078cc06035e9e84ddb6f4cbeccb0dd0eb818a13f85c4c66c1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:17:21,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:17:21,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:17:22,000 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:17:22,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:17:22,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:17:22,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:17:22,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:17:22,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:17:22,030 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:17:22,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:17:22,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:17:22,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:17:22,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:17:22,033 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:17:22,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:17:22,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:17:22,035 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:17:22,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:17:22,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:17:22,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:17:22,038 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:17:22,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:17:22,039 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:17:22,039 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:17:22,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:17:22,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:17:22,040 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:17:22,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:17:22,041 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:17:22,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:17:22,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:22,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:17:22,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:17:22,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:17:22,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:17:22,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:17:22,044 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:17:22,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:17:22,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:17:22,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:17:22,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:17:22,046 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_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d08db41ae0d7ec8078cc06035e9e84ddb6f4cbeccb0dd0eb818a13f85c4c66c1 [2023-11-21 22:17:22,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:17:22,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:17:22,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:17:22,389 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:17:22,389 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:17:22,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2023-11-21 22:17:25,601 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:17:26,030 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:17:26,033 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2023-11-21 22:17:26,059 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/data/16069ef9c/553330cafaea410eb44d9e94dda0bde9/FLAGefd9890c5 [2023-11-21 22:17:26,080 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/data/16069ef9c/553330cafaea410eb44d9e94dda0bde9 [2023-11-21 22:17:26,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:17:26,092 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:17:26,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:17:26,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:17:26,100 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:17:26,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:17:26" (1/1) ... [2023-11-21 22:17:26,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527ec423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:26, skipping insertion in model container [2023-11-21 22:17:26,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:17:26" (1/1) ... [2023-11-21 22:17:26,214 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:17:27,069 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_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/sv-benchmarks/c/eca-rers2012/Problem03_label18.c[61636,61649] [2023-11-21 22:17:27,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:17:27,123 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:17:27,456 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_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/sv-benchmarks/c/eca-rers2012/Problem03_label18.c[61636,61649] [2023-11-21 22:17:27,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:17:27,487 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:17:27,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27 WrapperNode [2023-11-21 22:17:27,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:17:27,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:17:27,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:17:27,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:17:27,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,650 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-21 22:17:27,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:17:27,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:17:27,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:17:27,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:17:27,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,673 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,707 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:17:27,707 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:17:27,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:17:27,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:17:27,849 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:17:27,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (1/1) ... [2023-11-21 22:17:27,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:27,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:17:27,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:17:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:17:28,054 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:17:28,057 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:17:30,090 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:17:30,776 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:17:30,777 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:17:30,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:17:30 BoogieIcfgContainer [2023-11-21 22:17:30,780 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:17:30,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:17:30,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:17:30,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:17:30,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:17:26" (1/3) ... [2023-11-21 22:17:30,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f86735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:17:30, skipping insertion in model container [2023-11-21 22:17:30,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:27" (2/3) ... [2023-11-21 22:17:30,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f86735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:17:30, skipping insertion in model container [2023-11-21 22:17:30,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:17:30" (3/3) ... [2023-11-21 22:17:30,795 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label18.c [2023-11-21 22:17:30,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:17:30,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:17:30,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:17:30,903 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65ffc50d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:17:30,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:17:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-21 22:17:30,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:30,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:30,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:30,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1290455288, now seen corresponding path program 1 times [2023-11-21 22:17:30,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:30,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854355028] [2023-11-21 22:17:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:32,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:32,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854355028] [2023-11-21 22:17:32,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854355028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:32,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:32,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:32,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183251560] [2023-11-21 22:17:32,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:32,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:32,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:32,209 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:33,365 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-21 22:17:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2023-11-21 22:17:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:33,382 INFO L225 Difference]: With dead ends: 440 [2023-11-21 22:17:33,382 INFO L226 Difference]: Without dead ends: 289 [2023-11-21 22:17:33,386 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 [2023-11-21 22:17:33,389 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:33,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 22:17:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-21 22:17:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-21 22:17:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5868055555555556) internal successors, (457), 288 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 457 transitions. [2023-11-21 22:17:33,451 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 457 transitions. Word has length 143 [2023-11-21 22:17:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:33,452 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 457 transitions. [2023-11-21 22:17:33,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 457 transitions. [2023-11-21 22:17:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 22:17:33,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:33,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:33,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:17:33,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:33,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1772913303, now seen corresponding path program 1 times [2023-11-21 22:17:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:33,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504399232] [2023-11-21 22:17:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:33,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:33,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504399232] [2023-11-21 22:17:33,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504399232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:33,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:33,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403716126] [2023-11-21 22:17:33,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:33,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:33,757 INFO L87 Difference]: Start difference. First operand 289 states and 457 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:34,689 INFO L93 Difference]: Finished difference Result 863 states and 1368 transitions. [2023-11-21 22:17:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2023-11-21 22:17:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:34,695 INFO L225 Difference]: With dead ends: 863 [2023-11-21 22:17:34,695 INFO L226 Difference]: Without dead ends: 575 [2023-11-21 22:17:34,705 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 [2023-11-21 22:17:34,710 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-21 22:17:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-21 22:17:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.548780487804878) internal successors, (889), 574 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 889 transitions. [2023-11-21 22:17:34,763 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 889 transitions. Word has length 151 [2023-11-21 22:17:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 889 transitions. [2023-11-21 22:17:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 889 transitions. [2023-11-21 22:17:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-21 22:17:34,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:34,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-21 22:17:34,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:17:34,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:34,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:34,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1736459177, now seen corresponding path program 1 times [2023-11-21 22:17:34,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:34,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027274038] [2023-11-21 22:17:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:34,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:17:35,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:35,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027274038] [2023-11-21 22:17:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027274038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:35,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289055539] [2023-11-21 22:17:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:35,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:35,198 INFO L87 Difference]: Start difference. First operand 575 states and 889 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:36,202 INFO L93 Difference]: Finished difference Result 1723 states and 2665 transitions. [2023-11-21 22:17:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 160 [2023-11-21 22:17:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:36,211 INFO L225 Difference]: With dead ends: 1723 [2023-11-21 22:17:36,211 INFO L226 Difference]: Without dead ends: 1149 [2023-11-21 22:17:36,212 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 [2023-11-21 22:17:36,214 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:36,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 104 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2023-11-21 22:17:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2023-11-21 22:17:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.5261780104712042) internal successors, (1749), 1146 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1749 transitions. [2023-11-21 22:17:36,262 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1749 transitions. Word has length 160 [2023-11-21 22:17:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:36,262 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1749 transitions. [2023-11-21 22:17:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1749 transitions. [2023-11-21 22:17:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-21 22:17:36,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:36,268 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:36,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:17:36,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:36,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1997486014, now seen corresponding path program 1 times [2023-11-21 22:17:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:36,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668107378] [2023-11-21 22:17:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:17:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:36,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668107378] [2023-11-21 22:17:36,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668107378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:36,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:36,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:17:36,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927496562] [2023-11-21 22:17:36,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:36,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:36,683 INFO L87 Difference]: Start difference. First operand 1147 states and 1749 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:37,593 INFO L93 Difference]: Finished difference Result 2865 states and 4566 transitions. [2023-11-21 22:17:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:37,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 163 [2023-11-21 22:17:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:37,605 INFO L225 Difference]: With dead ends: 2865 [2023-11-21 22:17:37,605 INFO L226 Difference]: Without dead ends: 1719 [2023-11-21 22:17:37,607 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 [2023-11-21 22:17:37,609 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 153 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:37,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 258 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:17:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2023-11-21 22:17:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2023-11-21 22:17:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4371362048894063) internal successors, (2469), 1718 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2469 transitions. [2023-11-21 22:17:37,668 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2469 transitions. Word has length 163 [2023-11-21 22:17:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:37,668 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2469 transitions. [2023-11-21 22:17:37,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2469 transitions. [2023-11-21 22:17:37,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-21 22:17:37,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:37,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2023-11-21 22:17:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:17:37,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:37,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 5540650, now seen corresponding path program 1 times [2023-11-21 22:17:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785390971] [2023-11-21 22:17:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:17:38,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:38,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785390971] [2023-11-21 22:17:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785390971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:38,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:38,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:17:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626243192] [2023-11-21 22:17:38,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:38,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:38,264 INFO L87 Difference]: Start difference. First operand 1719 states and 2469 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:39,190 INFO L93 Difference]: Finished difference Result 4009 states and 5812 transitions. [2023-11-21 22:17:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 171 [2023-11-21 22:17:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:39,205 INFO L225 Difference]: With dead ends: 4009 [2023-11-21 22:17:39,206 INFO L226 Difference]: Without dead ends: 2291 [2023-11-21 22:17:39,208 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 [2023-11-21 22:17:39,210 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:39,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 264 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-21 22:17:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2023-11-21 22:17:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3991266375545852) internal successors, (3204), 2290 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3204 transitions. [2023-11-21 22:17:39,281 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3204 transitions. Word has length 171 [2023-11-21 22:17:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:39,282 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3204 transitions. [2023-11-21 22:17:39,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3204 transitions. [2023-11-21 22:17:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-21 22:17:39,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:39,289 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2023-11-21 22:17:39,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:17:39,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:39,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1242307447, now seen corresponding path program 1 times [2023-11-21 22:17:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:39,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288167803] [2023-11-21 22:17:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:17:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288167803] [2023-11-21 22:17:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288167803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:39,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:17:39,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226731839] [2023-11-21 22:17:39,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:39,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:39,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:39,715 INFO L87 Difference]: Start difference. First operand 2291 states and 3204 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:40,694 INFO L93 Difference]: Finished difference Result 6011 states and 8350 transitions. [2023-11-21 22:17:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 176 [2023-11-21 22:17:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:40,717 INFO L225 Difference]: With dead ends: 6011 [2023-11-21 22:17:40,720 INFO L226 Difference]: Without dead ends: 3721 [2023-11-21 22:17:40,724 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 [2023-11-21 22:17:40,726 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 130 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:40,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 265 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:17:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2023-11-21 22:17:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3578. [2023-11-21 22:17:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 1.3340788370142578) internal successors, (4772), 3577 states have internal predecessors, (4772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 4772 transitions. [2023-11-21 22:17:40,847 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 4772 transitions. Word has length 176 [2023-11-21 22:17:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:40,854 INFO L495 AbstractCegarLoop]: Abstraction has 3578 states and 4772 transitions. [2023-11-21 22:17:40,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 4772 transitions. [2023-11-21 22:17:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-21 22:17:40,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:40,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:17:40,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:40,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash -805535428, now seen corresponding path program 1 times [2023-11-21 22:17:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:40,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194570975] [2023-11-21 22:17:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:40,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:41,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:41,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194570975] [2023-11-21 22:17:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194570975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714565443] [2023-11-21 22:17:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:41,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:41,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:17:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:41,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:17:41,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:17:41,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:17:41,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714565443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:41,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:17:41,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-21 22:17:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122369207] [2023-11-21 22:17:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:41,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:41,981 INFO L87 Difference]: Start difference. First operand 3578 states and 4772 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:42,888 INFO L93 Difference]: Finished difference Result 10158 states and 13643 transitions. [2023-11-21 22:17:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 181 [2023-11-21 22:17:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:42,931 INFO L225 Difference]: With dead ends: 10158 [2023-11-21 22:17:42,931 INFO L226 Difference]: Without dead ends: 6581 [2023-11-21 22:17:42,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:42,937 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:42,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 227 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:17:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6581 states. [2023-11-21 22:17:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6438. [2023-11-21 22:17:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.2978095386049402) internal successors, (8354), 6437 states have internal predecessors, (8354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 8354 transitions. [2023-11-21 22:17:43,121 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 8354 transitions. Word has length 181 [2023-11-21 22:17:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:43,122 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 8354 transitions. [2023-11-21 22:17:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 8354 transitions. [2023-11-21 22:17:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-21 22:17:43,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:43,137 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-21 22:17:43,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:43,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:43,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:43,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash 887034551, now seen corresponding path program 1 times [2023-11-21 22:17:43,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:43,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753654834] [2023-11-21 22:17:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-21 22:17:43,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753654834] [2023-11-21 22:17:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753654834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:43,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:43,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:17:43,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888111371] [2023-11-21 22:17:43,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:43,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:17:43,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:17:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:17:43,846 INFO L87 Difference]: Start difference. First operand 6438 states and 8354 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:45,350 INFO L93 Difference]: Finished difference Result 14591 states and 19002 transitions. [2023-11-21 22:17:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:17:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2023-11-21 22:17:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:45,396 INFO L225 Difference]: With dead ends: 14591 [2023-11-21 22:17:45,396 INFO L226 Difference]: Without dead ends: 8154 [2023-11-21 22:17:45,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:17:45,405 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 255 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:45,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 65 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-21 22:17:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8154 states. [2023-11-21 22:17:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8154 to 6438. [2023-11-21 22:17:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.2978095386049402) internal successors, (8354), 6437 states have internal predecessors, (8354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 8354 transitions. [2023-11-21 22:17:45,626 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 8354 transitions. Word has length 209 [2023-11-21 22:17:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:45,627 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 8354 transitions. [2023-11-21 22:17:45,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 8354 transitions. [2023-11-21 22:17:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-21 22:17:45,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:45,642 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:45,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:17:45,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:45,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash 888066330, now seen corresponding path program 1 times [2023-11-21 22:17:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776220160] [2023-11-21 22:17:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:17:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776220160] [2023-11-21 22:17:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776220160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:46,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:46,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:46,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223200977] [2023-11-21 22:17:46,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:46,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:46,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:46,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:46,008 INFO L87 Difference]: Start difference. First operand 6438 states and 8354 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:47,042 INFO L93 Difference]: Finished difference Result 18025 states and 23582 transitions. [2023-11-21 22:17:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:47,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 210 [2023-11-21 22:17:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:47,095 INFO L225 Difference]: With dead ends: 18025 [2023-11-21 22:17:47,096 INFO L226 Difference]: Without dead ends: 11588 [2023-11-21 22:17:47,106 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 [2023-11-21 22:17:47,109 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 144 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:47,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 103 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11588 states. [2023-11-21 22:17:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11588 to 10871. [2023-11-21 22:17:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10871 states, 10870 states have (on average 1.3179392824287028) internal successors, (14326), 10870 states have internal predecessors, (14326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10871 states to 10871 states and 14326 transitions. [2023-11-21 22:17:47,450 INFO L78 Accepts]: Start accepts. Automaton has 10871 states and 14326 transitions. Word has length 210 [2023-11-21 22:17:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:47,451 INFO L495 AbstractCegarLoop]: Abstraction has 10871 states and 14326 transitions. [2023-11-21 22:17:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10871 states and 14326 transitions. [2023-11-21 22:17:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-21 22:17:47,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:47,481 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-21 22:17:47,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:17:47,482 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:47,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash 531948605, now seen corresponding path program 1 times [2023-11-21 22:17:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:47,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275547389] [2023-11-21 22:17:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:47,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 22:17:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275547389] [2023-11-21 22:17:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275547389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723738512] [2023-11-21 22:17:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:47,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:47,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:48,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:17:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:48,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:17:48,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:17:48,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:17:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723738512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:48,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:17:48,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-21 22:17:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368087909] [2023-11-21 22:17:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:48,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:48,324 INFO L87 Difference]: Start difference. First operand 10871 states and 14326 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:49,411 INFO L93 Difference]: Finished difference Result 29177 states and 38556 transitions. [2023-11-21 22:17:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 211 [2023-11-21 22:17:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:49,455 INFO L225 Difference]: With dead ends: 29177 [2023-11-21 22:17:49,456 INFO L226 Difference]: Without dead ends: 18307 [2023-11-21 22:17:49,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:49,474 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 138 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:49,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 236 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18307 states. [2023-11-21 22:17:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18307 to 18307. [2023-11-21 22:17:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18307 states, 18306 states have (on average 1.2766852398120834) internal successors, (23371), 18306 states have internal predecessors, (23371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18307 states to 18307 states and 23371 transitions. [2023-11-21 22:17:49,851 INFO L78 Accepts]: Start accepts. Automaton has 18307 states and 23371 transitions. Word has length 211 [2023-11-21 22:17:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:49,852 INFO L495 AbstractCegarLoop]: Abstraction has 18307 states and 23371 transitions. [2023-11-21 22:17:49,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 18307 states and 23371 transitions. [2023-11-21 22:17:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-21 22:17:49,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:49,888 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, 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] [2023-11-21 22:17:49,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:50,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:17:50,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:50,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash 963084076, now seen corresponding path program 1 times [2023-11-21 22:17:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463079372] [2023-11-21 22:17:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-21 22:17:50,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:50,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463079372] [2023-11-21 22:17:50,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463079372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:50,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:50,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:50,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437845888] [2023-11-21 22:17:50,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:50,640 INFO L87 Difference]: Start difference. First operand 18307 states and 23371 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:51,782 INFO L93 Difference]: Finished difference Result 43050 states and 55459 transitions. [2023-11-21 22:17:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2023-11-21 22:17:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:51,923 INFO L225 Difference]: With dead ends: 43050 [2023-11-21 22:17:51,923 INFO L226 Difference]: Without dead ends: 25030 [2023-11-21 22:17:51,939 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 [2023-11-21 22:17:51,940 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:51,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 99 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25030 states. [2023-11-21 22:17:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25030 to 25028. [2023-11-21 22:17:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25028 states, 25027 states have (on average 1.2759819395053342) internal successors, (31934), 25027 states have internal predecessors, (31934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25028 states to 25028 states and 31934 transitions. [2023-11-21 22:17:52,413 INFO L78 Accepts]: Start accepts. Automaton has 25028 states and 31934 transitions. Word has length 215 [2023-11-21 22:17:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:52,414 INFO L495 AbstractCegarLoop]: Abstraction has 25028 states and 31934 transitions. [2023-11-21 22:17:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 25028 states and 31934 transitions. [2023-11-21 22:17:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-21 22:17:52,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:52,454 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-21 22:17:52,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:17:52,455 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:52,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash -837106426, now seen corresponding path program 1 times [2023-11-21 22:17:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613976751] [2023-11-21 22:17:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 22:17:52,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613976751] [2023-11-21 22:17:52,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613976751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:52,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:52,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:17:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051215879] [2023-11-21 22:17:52,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:17:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:17:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:17:52,970 INFO L87 Difference]: Start difference. First operand 25028 states and 31934 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:54,593 INFO L93 Difference]: Finished difference Result 48482 states and 61864 transitions. [2023-11-21 22:17:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:17:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 217 [2023-11-21 22:17:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:54,667 INFO L225 Difference]: With dead ends: 48482 [2023-11-21 22:17:54,667 INFO L226 Difference]: Without dead ends: 25171 [2023-11-21 22:17:54,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:17:54,689 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 260 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:54,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 67 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-21 22:17:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25171 states. [2023-11-21 22:17:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25171 to 24456. [2023-11-21 22:17:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24456 states, 24455 states have (on average 1.27875690042936) internal successors, (31272), 24455 states have internal predecessors, (31272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24456 states to 24456 states and 31272 transitions. [2023-11-21 22:17:55,083 INFO L78 Accepts]: Start accepts. Automaton has 24456 states and 31272 transitions. Word has length 217 [2023-11-21 22:17:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:55,083 INFO L495 AbstractCegarLoop]: Abstraction has 24456 states and 31272 transitions. [2023-11-21 22:17:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24456 states and 31272 transitions. [2023-11-21 22:17:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-21 22:17:55,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:55,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:55,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:17:55,111 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:55,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1510111420, now seen corresponding path program 1 times [2023-11-21 22:17:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823843404] [2023-11-21 22:17:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823843404] [2023-11-21 22:17:55,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823843404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:55,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:55,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646560920] [2023-11-21 22:17:55,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:55,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:55,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:55,872 INFO L87 Difference]: Start difference. First operand 24456 states and 31272 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:56,794 INFO L93 Difference]: Finished difference Result 47195 states and 60379 transitions. [2023-11-21 22:17:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2023-11-21 22:17:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:56,843 INFO L225 Difference]: With dead ends: 47195 [2023-11-21 22:17:56,843 INFO L226 Difference]: Without dead ends: 23455 [2023-11-21 22:17:56,857 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 [2023-11-21 22:17:56,858 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:56,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 108 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:17:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23455 states. [2023-11-21 22:17:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23455 to 23455. [2023-11-21 22:17:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23455 states, 23454 states have (on average 1.27662658821523) internal successors, (29942), 23454 states have internal predecessors, (29942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23455 states to 23455 states and 29942 transitions. [2023-11-21 22:17:57,337 INFO L78 Accepts]: Start accepts. Automaton has 23455 states and 29942 transitions. Word has length 217 [2023-11-21 22:17:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:57,337 INFO L495 AbstractCegarLoop]: Abstraction has 23455 states and 29942 transitions. [2023-11-21 22:17:57,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 23455 states and 29942 transitions. [2023-11-21 22:17:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-21 22:17:57,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:57,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:57,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:17:57,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:57,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash 309495098, now seen corresponding path program 1 times [2023-11-21 22:17:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329964748] [2023-11-21 22:17:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:57,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329964748] [2023-11-21 22:17:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329964748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:57,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663055134] [2023-11-21 22:17:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:57,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:17:57,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:17:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:17:57,733 INFO L87 Difference]: Start difference. First operand 23455 states and 29942 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:58,917 INFO L93 Difference]: Finished difference Result 51199 states and 66019 transitions. [2023-11-21 22:17:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:17:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2023-11-21 22:17:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:58,961 INFO L225 Difference]: With dead ends: 51199 [2023-11-21 22:17:58,961 INFO L226 Difference]: Without dead ends: 28460 [2023-11-21 22:17:58,972 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 [2023-11-21 22:17:58,973 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 91 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:58,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 92 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:17:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28460 states. [2023-11-21 22:17:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28460 to 27888. [2023-11-21 22:17:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27888 states, 27887 states have (on average 1.2575393552551368) internal successors, (35069), 27887 states have internal predecessors, (35069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27888 states to 27888 states and 35069 transitions. [2023-11-21 22:17:59,421 INFO L78 Accepts]: Start accepts. Automaton has 27888 states and 35069 transitions. Word has length 221 [2023-11-21 22:17:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:59,421 INFO L495 AbstractCegarLoop]: Abstraction has 27888 states and 35069 transitions. [2023-11-21 22:17:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:17:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 27888 states and 35069 transitions. [2023-11-21 22:17:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-21 22:17:59,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:59,445 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-11-21 22:17:59,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:17:59,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:59,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:59,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1963305227, now seen corresponding path program 1 times [2023-11-21 22:17:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:59,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937906901] [2023-11-21 22:17:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:59,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-21 22:18:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937906901] [2023-11-21 22:18:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937906901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491852749] [2023-11-21 22:18:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:00,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:00,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:00,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:18:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:00,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:18:00,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:18:00,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491852749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:00,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-21 22:18:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292164659] [2023-11-21 22:18:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:00,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:00,547 INFO L87 Difference]: Start difference. First operand 27888 states and 35069 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:01,312 INFO L93 Difference]: Finished difference Result 48482 states and 61186 transitions. [2023-11-21 22:18:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 224 [2023-11-21 22:18:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:01,363 INFO L225 Difference]: With dead ends: 48482 [2023-11-21 22:18:01,364 INFO L226 Difference]: Without dead ends: 21310 [2023-11-21 22:18:01,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:01,385 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:01,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:18:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21310 states. [2023-11-21 22:18:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21310 to 21024. [2023-11-21 22:18:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21024 states, 21023 states have (on average 1.2283213623174618) internal successors, (25823), 21023 states have internal predecessors, (25823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21024 states to 21024 states and 25823 transitions. [2023-11-21 22:18:01,881 INFO L78 Accepts]: Start accepts. Automaton has 21024 states and 25823 transitions. Word has length 224 [2023-11-21 22:18:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:01,881 INFO L495 AbstractCegarLoop]: Abstraction has 21024 states and 25823 transitions. [2023-11-21 22:18:01,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 21024 states and 25823 transitions. [2023-11-21 22:18:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-21 22:18:01,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:01,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-21 22:18:01,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c5fd8c-2d4e-4332-b894-ba2d86295d01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:18:02,125 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:02,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash 882901947, now seen corresponding path program 1 times [2023-11-21 22:18:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:02,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157480313] [2023-11-21 22:18:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-21 22:18:02,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:02,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157480313] [2023-11-21 22:18:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157480313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:02,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:02,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:18:02,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848357442] [2023-11-21 22:18:02,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:02,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:02,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:18:02,652 INFO L87 Difference]: Start difference. First operand 21024 states and 25823 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:03,685 INFO L93 Difference]: Finished difference Result 45910 states and 56296 transitions. [2023-11-21 22:18:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 251 [2023-11-21 22:18:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:03,713 INFO L225 Difference]: With dead ends: 45910 [2023-11-21 22:18:03,714 INFO L226 Difference]: Without dead ends: 26317 [2023-11-21 22:18:03,726 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 [2023-11-21 22:18:03,727 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 153 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:03,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 100 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:18:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26317 states. [2023-11-21 22:18:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26317 to 25886. [2023-11-21 22:18:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25886 states, 25885 states have (on average 1.2261155109136566) internal successors, (31738), 25885 states have internal predecessors, (31738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25886 states to 25886 states and 31738 transitions. [2023-11-21 22:18:04,141 INFO L78 Accepts]: Start accepts. Automaton has 25886 states and 31738 transitions. Word has length 251 [2023-11-21 22:18:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:04,142 INFO L495 AbstractCegarLoop]: Abstraction has 25886 states and 31738 transitions. [2023-11-21 22:18:04,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:04,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25886 states and 31738 transitions. [2023-11-21 22:18:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-21 22:18:04,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:04,160 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:04,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:18:04,161 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:04,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash 901238227, now seen corresponding path program 1 times [2023-11-21 22:18:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816201396] [2023-11-21 22:18:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 22:18:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816201396] [2023-11-21 22:18:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816201396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:04,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:04,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:18:04,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495480070] [2023-11-21 22:18:04,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:04,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:04,559 INFO L87 Difference]: Start difference. First operand 25886 states and 31738 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:05,565 INFO L93 Difference]: Finished difference Result 52200 states and 64583 transitions. [2023-11-21 22:18:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 259 [2023-11-21 22:18:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:05,596 INFO L225 Difference]: With dead ends: 52200 [2023-11-21 22:18:05,596 INFO L226 Difference]: Without dead ends: 27316 [2023-11-21 22:18:05,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:05,613 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 414 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:05,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 10 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:18:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27316 states. [2023-11-21 22:18:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27316 to 26315. [2023-11-21 22:18:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26315 states, 26314 states have (on average 1.134225127308657) internal successors, (29846), 26314 states have internal predecessors, (29846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 29846 transitions. [2023-11-21 22:18:06,086 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 29846 transitions. Word has length 259 [2023-11-21 22:18:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:06,086 INFO L495 AbstractCegarLoop]: Abstraction has 26315 states and 29846 transitions. [2023-11-21 22:18:06,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 29846 transitions. [2023-11-21 22:18:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-21 22:18:06,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:06,104 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-21 22:18:06,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:18:06,104 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:06,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1598010322, now seen corresponding path program 1 times [2023-11-21 22:18:06,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534596014] [2023-11-21 22:18:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:06,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 22:18:06,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:06,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534596014] [2023-11-21 22:18:06,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534596014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:06,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:06,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:18:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663995946] [2023-11-21 22:18:06,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:18:06,713 INFO L87 Difference]: Start difference. First operand 26315 states and 29846 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)