./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI --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 18a7594d74b235d4fbdd41518a0cbec8364c13612cadb2e8d1468970a3e94f85 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:51,943 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:52,011 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:42:52,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:52,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:52,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:52,065 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:52,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:52,066 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:52,071 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:52,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:52,073 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:52,074 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:52,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:52,076 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:52,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:52,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:42:52,078 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:52,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:52,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:52,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:52,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:42:52,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:52,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:42:52,082 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:52,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:42:52,083 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:52,084 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:52,084 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:52,085 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:52,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:52,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:52,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:52,087 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:52,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:42:52,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:52,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:52,088 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:52,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:52,089 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:42:52,089 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:52,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:52,090 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_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18a7594d74b235d4fbdd41518a0cbec8364c13612cadb2e8d1468970a3e94f85 [2023-11-24 21:42:52,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:52,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:52,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:52,450 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:52,450 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:52,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem14_label41.c [2023-11-24 21:42:55,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:42:55,838 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:42:55,839 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/sv-benchmarks/c/eca-rers2012/Problem14_label41.c [2023-11-24 21:42:55,869 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/data/c31052e64/2219d656e1da4e3bb0e5760fd4fddb92/FLAG02584f590 [2023-11-24 21:42:55,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/data/c31052e64/2219d656e1da4e3bb0e5760fd4fddb92 [2023-11-24 21:42:55,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:42:55,893 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:42:55,897 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:55,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:42:55,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:42:55,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:55" (1/1) ... [2023-11-24 21:42:55,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6885f154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:55, skipping insertion in model container [2023-11-24 21:42:55,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:55" (1/1) ... [2023-11-24 21:42:55,984 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:42:56,195 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_33548a74-fdb4-462b-bf5a-11b766f28ad8/sv-benchmarks/c/eca-rers2012/Problem14_label41.c[1045,1058] [2023-11-24 21:42:56,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:56,525 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:42:56,563 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_33548a74-fdb4-462b-bf5a-11b766f28ad8/sv-benchmarks/c/eca-rers2012/Problem14_label41.c[1045,1058] [2023-11-24 21:42:56,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:56,752 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:42:56,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56 WrapperNode [2023-11-24 21:42:56,753 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:56,754 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:56,754 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:42:56,754 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:42:56,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,874 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-24 21:42:56,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:56,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:42:56,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:42:56,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:42:56,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,898 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,940 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:42:56,950 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:57,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:57,030 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:57,037 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:57,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:42:57,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:42:57,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:42:57,058 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:42:57,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:57,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:57,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:57,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:42:57,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:42:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:42:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:42:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:42:57,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:42:57,212 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:42:57,215 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:42:58,708 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:42:58,785 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:42:58,787 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:42:58,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:58 BoogieIcfgContainer [2023-11-24 21:42:58,788 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:42:58,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:42:58,791 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:42:58,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:42:58,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:42:55" (1/3) ... [2023-11-24 21:42:58,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aca2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:58, skipping insertion in model container [2023-11-24 21:42:58,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56" (2/3) ... [2023-11-24 21:42:58,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aca2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:58, skipping insertion in model container [2023-11-24 21:42:58,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:58" (3/3) ... [2023-11-24 21:42:58,801 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label41.c [2023-11-24 21:42:58,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:42:58,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:42:58,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:42:58,936 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;@21eb7035, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:42:58,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:42:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:42:58,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:42:58,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:42:58,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:42:58,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:58,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1596255909, now seen corresponding path program 1 times [2023-11-24 21:42:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611854253] [2023-11-24 21:42:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611854253] [2023-11-24 21:42:59,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611854253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:59,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:59,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:42:59,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098244353] [2023-11-24 21:42:59,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:42:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:42:59,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:42:59,201 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:42:59,266 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-24 21:42:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:42:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:42:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:42:59,287 INFO L225 Difference]: With dead ends: 365 [2023-11-24 21:42:59,287 INFO L226 Difference]: Without dead ends: 181 [2023-11-24 21:42:59,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:42:59,296 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:42:59,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:42:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-24 21:42:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-24 21:42:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-24 21:42:59,353 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 6 [2023-11-24 21:42:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:42:59,353 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-24 21:42:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-24 21:42:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:42:59,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:42:59,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:42:59,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:42:59,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:42:59,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1597331268, now seen corresponding path program 1 times [2023-11-24 21:42:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:59,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092963146] [2023-11-24 21:42:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092963146] [2023-11-24 21:42:59,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092963146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:59,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:59,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:42:59,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727588348] [2023-11-24 21:42:59,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:59,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:59,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:59,462 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:00,487 INFO L93 Difference]: Finished difference Result 539 states and 882 transitions. [2023-11-24 21:43:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:43:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:00,491 INFO L225 Difference]: With dead ends: 539 [2023-11-24 21:43:00,491 INFO L226 Difference]: Without dead ends: 359 [2023-11-24 21:43:00,493 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 [2023-11-24 21:43:00,494 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 175 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:00,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 51 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:43:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-24 21:43:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-24 21:43:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.5223463687150838) internal successors, (545), 358 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 545 transitions. [2023-11-24 21:43:00,539 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 545 transitions. Word has length 6 [2023-11-24 21:43:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:00,540 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 545 transitions. [2023-11-24 21:43:00,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 545 transitions. [2023-11-24 21:43:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 21:43:00,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:00,544 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:43:00,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:00,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:00,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 43652426, now seen corresponding path program 1 times [2023-11-24 21:43:00,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:00,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985530879] [2023-11-24 21:43:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:00,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:00,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985530879] [2023-11-24 21:43:00,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985530879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:00,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:00,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:00,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482945561] [2023-11-24 21:43:00,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:00,871 INFO L87 Difference]: Start difference. First operand 359 states and 545 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:01,800 INFO L93 Difference]: Finished difference Result 1075 states and 1633 transitions. [2023-11-24 21:43:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:01,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2023-11-24 21:43:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:01,806 INFO L225 Difference]: With dead ends: 1075 [2023-11-24 21:43:01,806 INFO L226 Difference]: Without dead ends: 717 [2023-11-24 21:43:01,809 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 [2023-11-24 21:43:01,810 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 124 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:01,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 94 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:43:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-24 21:43:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2023-11-24 21:43:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.3557422969187676) internal successors, (968), 714 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 968 transitions. [2023-11-24 21:43:01,869 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 968 transitions. Word has length 81 [2023-11-24 21:43:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:01,870 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 968 transitions. [2023-11-24 21:43:01,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 968 transitions. [2023-11-24 21:43:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-24 21:43:01,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:01,874 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:43:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:01,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:01,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash 747491476, now seen corresponding path program 1 times [2023-11-24 21:43:01,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:01,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518396861] [2023-11-24 21:43:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:01,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:02,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:02,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518396861] [2023-11-24 21:43:02,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518396861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:02,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:02,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:02,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484881351] [2023-11-24 21:43:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:02,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:02,248 INFO L87 Difference]: Start difference. First operand 715 states and 968 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:03,574 INFO L93 Difference]: Finished difference Result 1965 states and 2574 transitions. [2023-11-24 21:43:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:03,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2023-11-24 21:43:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:03,582 INFO L225 Difference]: With dead ends: 1965 [2023-11-24 21:43:03,582 INFO L226 Difference]: Without dead ends: 1251 [2023-11-24 21:43:03,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:03,585 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 420 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:03,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 121 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:43:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-11-24 21:43:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2023-11-24 21:43:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.2379807692307692) internal successors, (1545), 1248 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1545 transitions. [2023-11-24 21:43:03,622 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1545 transitions. Word has length 85 [2023-11-24 21:43:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:03,622 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1545 transitions. [2023-11-24 21:43:03,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1545 transitions. [2023-11-24 21:43:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-24 21:43:03,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:03,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:03,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:03,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:03,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1569969695, now seen corresponding path program 1 times [2023-11-24 21:43:03,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:03,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273145167] [2023-11-24 21:43:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:04,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273145167] [2023-11-24 21:43:04,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273145167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:04,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:04,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:04,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251954461] [2023-11-24 21:43:04,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:04,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:04,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:04,057 INFO L87 Difference]: Start difference. First operand 1249 states and 1545 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:05,008 INFO L93 Difference]: Finished difference Result 2706 states and 3358 transitions. [2023-11-24 21:43:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2023-11-24 21:43:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:05,024 INFO L225 Difference]: With dead ends: 2706 [2023-11-24 21:43:05,024 INFO L226 Difference]: Without dead ends: 1607 [2023-11-24 21:43:05,026 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 [2023-11-24 21:43:05,027 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 104 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:05,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 119 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:43:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2023-11-24 21:43:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1605. [2023-11-24 21:43:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 1.124064837905237) internal successors, (1803), 1604 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1803 transitions. [2023-11-24 21:43:05,111 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 1803 transitions. Word has length 165 [2023-11-24 21:43:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:05,112 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 1803 transitions. [2023-11-24 21:43:05,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 1803 transitions. [2023-11-24 21:43:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-24 21:43:05,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:05,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:05,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:05,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:05,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash -851738491, now seen corresponding path program 1 times [2023-11-24 21:43:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013414854] [2023-11-24 21:43:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:05,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 62 proven. 130 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-24 21:43:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:05,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013414854] [2023-11-24 21:43:05,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013414854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:05,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436147796] [2023-11-24 21:43:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:05,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:05,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:05,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:05,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:06,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:06,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-24 21:43:06,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436147796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:06,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:06,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 21:43:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264636739] [2023-11-24 21:43:06,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:06,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:06,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:06,591 INFO L87 Difference]: Start difference. First operand 1605 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:07,364 INFO L93 Difference]: Finished difference Result 3387 states and 3906 transitions. [2023-11-24 21:43:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:07,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2023-11-24 21:43:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:07,386 INFO L225 Difference]: With dead ends: 3387 [2023-11-24 21:43:07,387 INFO L226 Difference]: Without dead ends: 1961 [2023-11-24 21:43:07,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:07,395 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:07,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 45 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:43:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-24 21:43:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1961. [2023-11-24 21:43:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.1224489795918366) internal successors, (2200), 1960 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2200 transitions. [2023-11-24 21:43:07,460 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2200 transitions. Word has length 292 [2023-11-24 21:43:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:07,462 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2200 transitions. [2023-11-24 21:43:07,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2200 transitions. [2023-11-24 21:43:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-24 21:43:07,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:07,470 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:07,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:07,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:07,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:07,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1514068401, now seen corresponding path program 1 times [2023-11-24 21:43:07,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064104383] [2023-11-24 21:43:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-24 21:43:08,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064104383] [2023-11-24 21:43:08,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064104383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:08,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:08,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32402036] [2023-11-24 21:43:08,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:08,285 INFO L87 Difference]: Start difference. First operand 1961 states and 2200 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:09,014 INFO L93 Difference]: Finished difference Result 4099 states and 4647 transitions. [2023-11-24 21:43:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2023-11-24 21:43:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:09,027 INFO L225 Difference]: With dead ends: 4099 [2023-11-24 21:43:09,027 INFO L226 Difference]: Without dead ends: 2317 [2023-11-24 21:43:09,030 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 [2023-11-24 21:43:09,031 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 100 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:09,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 75 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:43:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2023-11-24 21:43:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2023-11-24 21:43:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.1204663212435233) internal successors, (2595), 2316 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2595 transitions. [2023-11-24 21:43:09,091 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2595 transitions. Word has length 296 [2023-11-24 21:43:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:09,093 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2595 transitions. [2023-11-24 21:43:09,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2595 transitions. [2023-11-24 21:43:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-11-24 21:43:09,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:09,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-11-24 21:43:09,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:09,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:09,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2040058827, now seen corresponding path program 1 times [2023-11-24 21:43:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231394607] [2023-11-24 21:43:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:09,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:43:09,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:09,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231394607] [2023-11-24 21:43:09,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231394607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:09,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:09,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494975471] [2023-11-24 21:43:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:09,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:09,459 INFO L87 Difference]: Start difference. First operand 2317 states and 2595 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:10,163 INFO L93 Difference]: Finished difference Result 4811 states and 5480 transitions. [2023-11-24 21:43:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2023-11-24 21:43:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:10,179 INFO L225 Difference]: With dead ends: 4811 [2023-11-24 21:43:10,179 INFO L226 Difference]: Without dead ends: 2673 [2023-11-24 21:43:10,182 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 [2023-11-24 21:43:10,182 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 174 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:10,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 255 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:43:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-11-24 21:43:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2673. [2023-11-24 21:43:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2672 states have (on average 1.1212574850299402) internal successors, (2996), 2672 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 2996 transitions. [2023-11-24 21:43:10,248 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 2996 transitions. Word has length 323 [2023-11-24 21:43:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:10,249 INFO L495 AbstractCegarLoop]: Abstraction has 2673 states and 2996 transitions. [2023-11-24 21:43:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 2996 transitions. [2023-11-24 21:43:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-24 21:43:10,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:10,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-24 21:43:10,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:10,255 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:10,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2026681980, now seen corresponding path program 1 times [2023-11-24 21:43:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:10,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889455106] [2023-11-24 21:43:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:43:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889455106] [2023-11-24 21:43:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889455106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:10,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:10,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634394477] [2023-11-24 21:43:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:10,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:10,566 INFO L87 Difference]: Start difference. First operand 2673 states and 2996 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:11,247 INFO L93 Difference]: Finished difference Result 5523 states and 6282 transitions. [2023-11-24 21:43:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 330 [2023-11-24 21:43:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:11,265 INFO L225 Difference]: With dead ends: 5523 [2023-11-24 21:43:11,266 INFO L226 Difference]: Without dead ends: 3029 [2023-11-24 21:43:11,269 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 [2023-11-24 21:43:11,271 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 177 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:11,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 222 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:43:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2023-11-24 21:43:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2851. [2023-11-24 21:43:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 1.1417543859649122) internal successors, (3254), 2850 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 3254 transitions. [2023-11-24 21:43:11,342 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 3254 transitions. Word has length 330 [2023-11-24 21:43:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:11,343 INFO L495 AbstractCegarLoop]: Abstraction has 2851 states and 3254 transitions. [2023-11-24 21:43:11,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 3254 transitions. [2023-11-24 21:43:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-11-24 21:43:11,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:11,351 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:43:11,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:11,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -117431869, now seen corresponding path program 1 times [2023-11-24 21:43:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558501273] [2023-11-24 21:43:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:43:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:11,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558501273] [2023-11-24 21:43:11,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558501273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:11,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:11,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309810740] [2023-11-24 21:43:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:11,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:11,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:11,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:11,729 INFO L87 Difference]: Start difference. First operand 2851 states and 3254 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:12,440 INFO L93 Difference]: Finished difference Result 6591 states and 7589 transitions. [2023-11-24 21:43:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2023-11-24 21:43:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:12,462 INFO L225 Difference]: With dead ends: 6591 [2023-11-24 21:43:12,462 INFO L226 Difference]: Without dead ends: 3919 [2023-11-24 21:43:12,465 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 [2023-11-24 21:43:12,466 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 120 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:12,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 55 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:43:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2023-11-24 21:43:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3919. [2023-11-24 21:43:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.1378254211332313) internal successors, (4458), 3918 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4458 transitions. [2023-11-24 21:43:12,582 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4458 transitions. Word has length 402 [2023-11-24 21:43:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:12,583 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4458 transitions. [2023-11-24 21:43:12,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4458 transitions. [2023-11-24 21:43:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-24 21:43:12,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:12,594 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:12,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:43:12,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:12,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash -986238068, now seen corresponding path program 1 times [2023-11-24 21:43:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:12,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628325841] [2023-11-24 21:43:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-24 21:43:13,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:13,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628325841] [2023-11-24 21:43:13,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628325841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:13,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:13,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:13,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083268735] [2023-11-24 21:43:13,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:13,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:13,153 INFO L87 Difference]: Start difference. First operand 3919 states and 4458 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:13,961 INFO L93 Difference]: Finished difference Result 7895 states and 8990 transitions. [2023-11-24 21:43:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 477 [2023-11-24 21:43:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:13,984 INFO L225 Difference]: With dead ends: 7895 [2023-11-24 21:43:13,984 INFO L226 Difference]: Without dead ends: 4097 [2023-11-24 21:43:13,989 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 [2023-11-24 21:43:13,990 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 141 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 14 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:43:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2023-11-24 21:43:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3919. [2023-11-24 21:43:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.0944359367023992) internal successors, (4288), 3918 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4288 transitions. [2023-11-24 21:43:14,122 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4288 transitions. Word has length 477 [2023-11-24 21:43:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:14,123 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4288 transitions. [2023-11-24 21:43:14,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4288 transitions. [2023-11-24 21:43:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-11-24 21:43:14,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:14,135 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:43:14,135 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:14,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash 265320778, now seen corresponding path program 1 times [2023-11-24 21:43:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347114744] [2023-11-24 21:43:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:43:14,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347114744] [2023-11-24 21:43:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347114744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:14,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522953193] [2023-11-24 21:43:14,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:14,683 INFO L87 Difference]: Start difference. First operand 3919 states and 4288 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:15,813 INFO L93 Difference]: Finished difference Result 10151 states and 11193 transitions. [2023-11-24 21:43:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 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 485 [2023-11-24 21:43:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:15,847 INFO L225 Difference]: With dead ends: 10151 [2023-11-24 21:43:15,848 INFO L226 Difference]: Without dead ends: 6411 [2023-11-24 21:43:15,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:15,854 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 221 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:15,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 204 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:43:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2023-11-24 21:43:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 6233. [2023-11-24 21:43:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 1.0943517329910142) internal successors, (6820), 6232 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 6820 transitions. [2023-11-24 21:43:16,017 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 6820 transitions. Word has length 485 [2023-11-24 21:43:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:16,018 INFO L495 AbstractCegarLoop]: Abstraction has 6233 states and 6820 transitions. [2023-11-24 21:43:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 6820 transitions. [2023-11-24 21:43:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-24 21:43:16,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:16,026 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:16,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:43:16,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:16,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 594545898, now seen corresponding path program 1 times [2023-11-24 21:43:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:16,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181794407] [2023-11-24 21:43:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 740 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-11-24 21:43:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181794407] [2023-11-24 21:43:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181794407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331500678] [2023-11-24 21:43:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:16,768 INFO L87 Difference]: Start difference. First operand 6233 states and 6820 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:17,471 INFO L93 Difference]: Finished difference Result 12287 states and 13460 transitions. [2023-11-24 21:43:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 539 [2023-11-24 21:43:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:17,498 INFO L225 Difference]: With dead ends: 12287 [2023-11-24 21:43:17,498 INFO L226 Difference]: Without dead ends: 6233 [2023-11-24 21:43:17,505 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 [2023-11-24 21:43:17,506 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:17,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 208 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:43:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2023-11-24 21:43:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 6233. [2023-11-24 21:43:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 1.0734916559691912) internal successors, (6690), 6232 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 6690 transitions. [2023-11-24 21:43:17,650 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 6690 transitions. Word has length 539 [2023-11-24 21:43:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:17,651 INFO L495 AbstractCegarLoop]: Abstraction has 6233 states and 6690 transitions. [2023-11-24 21:43:17,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 6690 transitions. [2023-11-24 21:43:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-24 21:43:17,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:17,660 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:17,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:43:17,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:17,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash -531480665, now seen corresponding path program 1 times [2023-11-24 21:43:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695563596] [2023-11-24 21:43:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 1025 proven. 104 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-11-24 21:43:18,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695563596] [2023-11-24 21:43:18,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695563596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111523052] [2023-11-24 21:43:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:18,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:18,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:18,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:43:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:19,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:19,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 1052 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-24 21:43:19,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111523052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:19,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:19,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 21:43:19,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904738830] [2023-11-24 21:43:19,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:19,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:19,725 INFO L87 Difference]: Start difference. First operand 6233 states and 6690 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:20,320 INFO L93 Difference]: Finished difference Result 12287 states and 13200 transitions. [2023-11-24 21:43:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 616 [2023-11-24 21:43:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:20,334 INFO L225 Difference]: With dead ends: 12287 [2023-11-24 21:43:20,334 INFO L226 Difference]: Without dead ends: 6233 [2023-11-24 21:43:20,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:20,341 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:20,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:43:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2023-11-24 21:43:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 6233. [2023-11-24 21:43:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 1.0702824133504494) internal successors, (6670), 6232 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 6670 transitions. [2023-11-24 21:43:20,516 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 6670 transitions. Word has length 616 [2023-11-24 21:43:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:20,517 INFO L495 AbstractCegarLoop]: Abstraction has 6233 states and 6670 transitions. [2023-11-24 21:43:20,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 6670 transitions. [2023-11-24 21:43:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2023-11-24 21:43:20,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:20,529 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2023-11-24 21:43:20,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:20,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:43:20,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:20,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash 375486774, now seen corresponding path program 1 times [2023-11-24 21:43:20,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:20,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116872055] [2023-11-24 21:43:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:20,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 670 proven. 155 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:43:21,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116872055] [2023-11-24 21:43:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116872055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622524748] [2023-11-24 21:43:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:21,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:21,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:21,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:21,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:43:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:21,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:21,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2023-11-24 21:43:21,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:21,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622524748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:21,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:21,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-24 21:43:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81428865] [2023-11-24 21:43:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:21,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:21,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:21,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:21,830 INFO L87 Difference]: Start difference. First operand 6233 states and 6670 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:22,496 INFO L93 Difference]: Finished difference Result 12287 states and 13160 transitions. [2023-11-24 21:43:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:22,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 660 [2023-11-24 21:43:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:22,509 INFO L225 Difference]: With dead ends: 12287 [2023-11-24 21:43:22,509 INFO L226 Difference]: Without dead ends: 6233 [2023-11-24 21:43:22,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:22,518 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 185 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:22,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 211 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:43:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2023-11-24 21:43:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 6233. [2023-11-24 21:43:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 1.0609756097560976) internal successors, (6612), 6232 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 6612 transitions. [2023-11-24 21:43:22,631 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 6612 transitions. Word has length 660 [2023-11-24 21:43:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:22,632 INFO L495 AbstractCegarLoop]: Abstraction has 6233 states and 6612 transitions. [2023-11-24 21:43:22,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 6612 transitions. [2023-11-24 21:43:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2023-11-24 21:43:22,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:22,642 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 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] [2023-11-24 21:43:22,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:43:22,851 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:22,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1244757105, now seen corresponding path program 1 times [2023-11-24 21:43:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:22,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999955896] [2023-11-24 21:43:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 1174 proven. 155 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-11-24 21:43:23,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999955896] [2023-11-24 21:43:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999955896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435372368] [2023-11-24 21:43:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:23,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:23,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:23,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:23,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:43:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:23,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:23,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2023-11-24 21:43:24,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435372368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:24,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:24,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-24 21:43:24,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375435163] [2023-11-24 21:43:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:24,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:24,088 INFO L87 Difference]: Start difference. First operand 6233 states and 6612 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:24,787 INFO L93 Difference]: Finished difference Result 12287 states and 13044 transitions. [2023-11-24 21:43:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 761 [2023-11-24 21:43:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:24,815 INFO L225 Difference]: With dead ends: 12287 [2023-11-24 21:43:24,816 INFO L226 Difference]: Without dead ends: 6233 [2023-11-24 21:43:24,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:24,823 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:24,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 25 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:43:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2023-11-24 21:43:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 6055. [2023-11-24 21:43:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 1.0526924347538817) internal successors, (6373), 6054 states have internal predecessors, (6373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 6373 transitions. [2023-11-24 21:43:24,930 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 6373 transitions. Word has length 761 [2023-11-24 21:43:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:24,931 INFO L495 AbstractCegarLoop]: Abstraction has 6055 states and 6373 transitions. [2023-11-24 21:43:24,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 6373 transitions. [2023-11-24 21:43:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2023-11-24 21:43:24,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:24,944 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:24,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:25,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:43:25,145 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:25,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash -521114362, now seen corresponding path program 1 times [2023-11-24 21:43:25,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:25,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135758910] [2023-11-24 21:43:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 1705 proven. 110 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-11-24 21:43:25,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135758910] [2023-11-24 21:43:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135758910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044461026] [2023-11-24 21:43:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:25,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:25,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:25,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:43:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:26,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:26,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 1705 proven. 110 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-11-24 21:43:26,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 1705 proven. 110 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-11-24 21:43:27,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044461026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:27,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:27,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-24 21:43:27,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214681558] [2023-11-24 21:43:27,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:27,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:27,029 INFO L87 Difference]: Start difference. First operand 6055 states and 6373 transitions. Second operand has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:28,176 INFO L93 Difference]: Finished difference Result 13711 states and 14440 transitions. [2023-11-24 21:43:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 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 804 [2023-11-24 21:43:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:28,190 INFO L225 Difference]: With dead ends: 13711 [2023-11-24 21:43:28,190 INFO L226 Difference]: Without dead ends: 7835 [2023-11-24 21:43:28,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1606 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:28,198 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 268 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:28,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 59 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:43:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7835 states. [2023-11-24 21:43:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7835 to 6411. [2023-11-24 21:43:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6411 states, 6410 states have (on average 1.0492979719188769) internal successors, (6726), 6410 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6411 states to 6411 states and 6726 transitions. [2023-11-24 21:43:28,345 INFO L78 Accepts]: Start accepts. Automaton has 6411 states and 6726 transitions. Word has length 804 [2023-11-24 21:43:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:28,346 INFO L495 AbstractCegarLoop]: Abstraction has 6411 states and 6726 transitions. [2023-11-24 21:43:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6411 states and 6726 transitions. [2023-11-24 21:43:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 853 [2023-11-24 21:43:28,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:28,358 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 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] [2023-11-24 21:43:28,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:43:28,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1648167822, now seen corresponding path program 1 times [2023-11-24 21:43:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425307012] [2023-11-24 21:43:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:28,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 1540 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2023-11-24 21:43:29,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425307012] [2023-11-24 21:43:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425307012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:29,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:29,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449846399] [2023-11-24 21:43:29,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:29,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:29,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:29,754 INFO L87 Difference]: Start difference. First operand 6411 states and 6726 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:30,352 INFO L93 Difference]: Finished difference Result 12999 states and 13651 transitions. [2023-11-24 21:43:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:30,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 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 852 [2023-11-24 21:43:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:30,375 INFO L225 Difference]: With dead ends: 12999 [2023-11-24 21:43:30,376 INFO L226 Difference]: Without dead ends: 6767 [2023-11-24 21:43:30,381 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 [2023-11-24 21:43:30,383 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:30,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 222 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:43:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2023-11-24 21:43:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 6589. [2023-11-24 21:43:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 1.042046144505161) internal successors, (6865), 6588 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 6865 transitions. [2023-11-24 21:43:30,496 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 6865 transitions. Word has length 852 [2023-11-24 21:43:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:30,497 INFO L495 AbstractCegarLoop]: Abstraction has 6589 states and 6865 transitions. [2023-11-24 21:43:30,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 6865 transitions. [2023-11-24 21:43:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2023-11-24 21:43:30,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:30,511 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:43:30,511 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:30,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1163085089, now seen corresponding path program 1 times [2023-11-24 21:43:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:30,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055778112] [2023-11-24 21:43:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:30,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 1559 proven. 93 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2023-11-24 21:43:31,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:31,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055778112] [2023-11-24 21:43:31,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055778112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:31,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068926435] [2023-11-24 21:43:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:31,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:31,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:31,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:43:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:31,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 634 proven. 0 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2023-11-24 21:43:33,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068926435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:33,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:33,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 21:43:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876447444] [2023-11-24 21:43:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:33,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:33,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:33,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:33,040 INFO L87 Difference]: Start difference. First operand 6589 states and 6865 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:33,589 INFO L93 Difference]: Finished difference Result 14423 states and 15004 transitions. [2023-11-24 21:43:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 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 870 [2023-11-24 21:43:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:33,599 INFO L225 Difference]: With dead ends: 14423 [2023-11-24 21:43:33,599 INFO L226 Difference]: Without dead ends: 8013 [2023-11-24 21:43:33,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:33,606 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:33,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:43:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8013 states. [2023-11-24 21:43:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8013 to 6767. [2023-11-24 21:43:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 1.0400532072125332) internal successors, (7037), 6766 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 7037 transitions. [2023-11-24 21:43:33,718 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 7037 transitions. Word has length 870 [2023-11-24 21:43:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:33,719 INFO L495 AbstractCegarLoop]: Abstraction has 6767 states and 7037 transitions. [2023-11-24 21:43:33,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 7037 transitions. [2023-11-24 21:43:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2023-11-24 21:43:33,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:33,733 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:33,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:33,939 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:33,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1298731142, now seen corresponding path program 1 times [2023-11-24 21:43:33,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622218974] [2023-11-24 21:43:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1795 proven. 93 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2023-11-24 21:43:34,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622218974] [2023-11-24 21:43:34,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622218974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118474622] [2023-11-24 21:43:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:34,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:34,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:43:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:35,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1888 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2023-11-24 21:43:35,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118474622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:35,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:35,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:43:35,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408251903] [2023-11-24 21:43:35,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:35,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:35,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:35,828 INFO L87 Difference]: Start difference. First operand 6767 states and 7037 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:36,432 INFO L93 Difference]: Finished difference Result 13889 states and 14453 transitions. [2023-11-24 21:43:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 894 [2023-11-24 21:43:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:36,440 INFO L225 Difference]: With dead ends: 13889 [2023-11-24 21:43:36,440 INFO L226 Difference]: Without dead ends: 7301 [2023-11-24 21:43:36,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:36,446 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:36,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:43:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2023-11-24 21:43:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 6767. [2023-11-24 21:43:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 1.0412355897132723) internal successors, (7045), 6766 states have internal predecessors, (7045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 7045 transitions. [2023-11-24 21:43:36,546 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 7045 transitions. Word has length 894 [2023-11-24 21:43:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:36,546 INFO L495 AbstractCegarLoop]: Abstraction has 6767 states and 7045 transitions. [2023-11-24 21:43:36,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 7045 transitions. [2023-11-24 21:43:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2023-11-24 21:43:36,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:36,561 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:36,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:36,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33548a74-fdb4-462b-bf5a-11b766f28ad8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:36,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1453794205, now seen corresponding path program 1 times [2023-11-24 21:43:36,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:36,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497859191] [2023-11-24 21:43:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:36,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 1425 proven. 0 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2023-11-24 21:43:37,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497859191] [2023-11-24 21:43:37,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497859191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:37,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:43:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623973252] [2023-11-24 21:43:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:43:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:43:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:37,732 INFO L87 Difference]: Start difference. First operand 6767 states and 7045 transitions. Second operand has 7 states, 7 states have (on average 48.714285714285715) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)