./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya --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 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:30:31,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:30:31,611 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:30:31,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:30:31,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:30:31,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:30:31,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:30:31,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:30:31,648 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:30:31,648 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:30:31,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:30:31,649 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:30:31,650 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:30:31,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:30:31,651 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:30:31,652 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:30:31,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:30:31,652 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:30:31,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:30:31,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:30:31,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:30:31,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:30:31,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:30:31,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:30:31,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:30:31,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:30:31,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:30:31,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:30:31,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:30:31,657 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:30:31,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:30:31,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:30:31,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:30:31,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:30:31,659 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:30:31,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:30:31,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:30:31,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:30:31,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:30:31,659 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:30:31,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:30:31,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:30:31,660 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_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2023-11-29 05:30:31,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:30:31,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:30:31,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:30:31,927 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:30:31,928 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:30:31,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2023-11-29 05:30:34,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:30:34,849 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:30:34,850 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2023-11-29 05:30:34,856 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/data/e6ffa3ad8/22da15af1c7c482d92dd8fecda1597fc/FLAG51c5791aa [2023-11-29 05:30:34,871 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/data/e6ffa3ad8/22da15af1c7c482d92dd8fecda1597fc [2023-11-29 05:30:34,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:30:34,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:30:34,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:30:34,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:30:34,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:30:34,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:30:34" (1/1) ... [2023-11-29 05:30:34,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5ef855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:34, skipping insertion in model container [2023-11-29 05:30:34,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:30:34" (1/1) ... [2023-11-29 05:30:34,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:30:35,039 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_cd5c2fff-9c9e-43c1-89de-617e1b90047a/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2023-11-29 05:30:35,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:30:35,060 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:30:35,070 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_cd5c2fff-9c9e-43c1-89de-617e1b90047a/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2023-11-29 05:30:35,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:30:35,084 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:30:35,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35 WrapperNode [2023-11-29 05:30:35,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:30:35,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:30:35,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:30:35,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:30:35,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,113 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-11-29 05:30:35,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:30:35,114 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:30:35,114 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:30:35,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:30:35,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,124 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,133 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]. [2023-11-29 05:30:35,134 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,141 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:30:35,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:30:35,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:30:35,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:30:35,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (1/1) ... [2023-11-29 05:30:35,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:30:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:35,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:30:35,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:30:35,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:30:35,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:30:35,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:30:35,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:30:35,262 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:30:35,264 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:30:35,367 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:30:35,385 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:30:35,385 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 05:30:35,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:30:35 BoogieIcfgContainer [2023-11-29 05:30:35,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:30:35,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:30:35,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:30:35,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:30:35,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:30:34" (1/3) ... [2023-11-29 05:30:35,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac6d06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:30:35, skipping insertion in model container [2023-11-29 05:30:35,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:30:35" (2/3) ... [2023-11-29 05:30:35,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac6d06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:30:35, skipping insertion in model container [2023-11-29 05:30:35,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:30:35" (3/3) ... [2023-11-29 05:30:35,395 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2023-11-29 05:30:35,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:30:35,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:30:35,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:30:35,451 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;@6390e4e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:30:35,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:30:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 05:30:35,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:35,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:30:35,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2043540179, now seen corresponding path program 1 times [2023-11-29 05:30:35,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:35,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922122637] [2023-11-29 05:30:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:35,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:35,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922122637] [2023-11-29 05:30:35,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922122637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:30:35,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:30:35,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:30:35,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895098620] [2023-11-29 05:30:35,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:30:35,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:30:35,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:30:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:30:35,652 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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) [2023-11-29 05:30:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:35,673 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2023-11-29 05:30:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:30:35,676 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 [2023-11-29 05:30:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:35,682 INFO L225 Difference]: With dead ends: 17 [2023-11-29 05:30:35,683 INFO L226 Difference]: Without dead ends: 8 [2023-11-29 05:30:35,685 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 [2023-11-29 05:30:35,688 INFO L413 NwaCegarLoop]: 10 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, 10 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 [2023-11-29 05:30:35,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:30:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-29 05:30:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-29 05:30:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2023-11-29 05:30:35,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2023-11-29 05:30:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:35,712 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2023-11-29 05:30:35,712 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) [2023-11-29 05:30:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2023-11-29 05:30:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 05:30:35,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:35,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:30:35,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:30:35,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:35,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2052775389, now seen corresponding path program 1 times [2023-11-29 05:30:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:35,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843830745] [2023-11-29 05:30:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:35,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:35,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843830745] [2023-11-29 05:30:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843830745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:30:35,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:30:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:30:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950509990] [2023-11-29 05:30:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:30:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:30:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:30:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:30:35,792 INFO L87 Difference]: Start difference. First operand 8 states and 10 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) [2023-11-29 05:30:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:35,813 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2023-11-29 05:30:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:30:35,814 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 [2023-11-29 05:30:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:35,814 INFO L225 Difference]: With dead ends: 17 [2023-11-29 05:30:35,815 INFO L226 Difference]: Without dead ends: 10 [2023-11-29 05:30:35,815 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 [2023-11-29 05:30:35,817 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:30:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-29 05:30:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-29 05:30:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-29 05:30:35,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-11-29 05:30:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:35,822 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-29 05:30:35,822 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) [2023-11-29 05:30:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-29 05:30:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:30:35,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:35,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:35,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:30:35,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:35,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:35,825 INFO L85 PathProgramCache]: Analyzing trace with hash 82784800, now seen corresponding path program 1 times [2023-11-29 05:30:35,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:35,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127113075] [2023-11-29 05:30:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:35,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:35,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127113075] [2023-11-29 05:30:35,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127113075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:35,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725359092] [2023-11-29 05:30:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:35,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:35,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:35,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:30:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:35,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:30:35,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:35,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:30:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725359092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:36,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 05:30:36,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280007849] [2023-11-29 05:30:36,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:30:36,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:30:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:30:36,027 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:36,066 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2023-11-29 05:30:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:30:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 8 [2023-11-29 05:30:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:36,067 INFO L225 Difference]: With dead ends: 22 [2023-11-29 05:30:36,068 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 05:30:36,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:30:36,070 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:36,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:30:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 05:30:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 05:30:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-29 05:30:36,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2023-11-29 05:30:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:36,076 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-29 05:30:36,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-29 05:30:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:30:36,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:36,077 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:36,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:30:36,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:36,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:36,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2105829779, now seen corresponding path program 1 times [2023-11-29 05:30:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:36,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698522724] [2023-11-29 05:30:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:36,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:36,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698522724] [2023-11-29 05:30:36,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698522724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:36,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80423731] [2023-11-29 05:30:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:36,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:36,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:36,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:30:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:36,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:30:36,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:36,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80423731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:36,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:36,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 05:30:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343116406] [2023-11-29 05:30:36,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:30:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:36,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:30:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:30:36,501 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:36,542 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-29 05:30:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:30:36,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 14 [2023-11-29 05:30:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:36,544 INFO L225 Difference]: With dead ends: 33 [2023-11-29 05:30:36,544 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 05:30:36,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:30:36,546 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:36,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:30:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 05:30:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 05:30:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-29 05:30:36,553 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-11-29 05:30:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:36,554 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-29 05:30:36,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-29 05:30:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:30:36,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:36,556 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:36,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:30:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 05:30:36,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:36,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2017325575, now seen corresponding path program 2 times [2023-11-29 05:30:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:36,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896979765] [2023-11-29 05:30:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:36,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:36,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:36,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896979765] [2023-11-29 05:30:36,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896979765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:36,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780869101] [2023-11-29 05:30:36,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:30:36,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:36,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:36,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:36,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:30:36,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:30:36,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:36,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:30:36,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:37,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780869101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:37,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 05:30:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331381646] [2023-11-29 05:30:37,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:37,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:30:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:30:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:30:37,133 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:37,198 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-11-29 05:30:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:30:37,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 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 22 [2023-11-29 05:30:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:37,200 INFO L225 Difference]: With dead ends: 49 [2023-11-29 05:30:37,200 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 05:30:37,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:30:37,201 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:37,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:30:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 05:30:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-29 05:30:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-29 05:30:37,209 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 22 [2023-11-29 05:30:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:37,209 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-29 05:30:37,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-29 05:30:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:30:37,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:37,211 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:37,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:30:37,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:37,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:37,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1737746159, now seen corresponding path program 3 times [2023-11-29 05:30:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096676670] [2023-11-29 05:30:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:37,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:37,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096676670] [2023-11-29 05:30:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096676670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639849117] [2023-11-29 05:30:37,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:30:37,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:37,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:37,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:37,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:30:37,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:30:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:37,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:30:37,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 05:30:37,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:30:37,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639849117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:30:37,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:30:37,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 19 [2023-11-29 05:30:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8184342] [2023-11-29 05:30:37,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:30:37,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:30:37,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:30:37,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:30:37,978 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:38,004 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-11-29 05:30:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:30:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 38 [2023-11-29 05:30:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:38,006 INFO L225 Difference]: With dead ends: 52 [2023-11-29 05:30:38,006 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 05:30:38,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:30:38,008 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:38,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:30:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 05:30:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-11-29 05:30:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-11-29 05:30:38,018 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 38 [2023-11-29 05:30:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:38,018 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-11-29 05:30:38,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-11-29 05:30:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 05:30:38,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:38,020 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 3, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:38,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:30:38,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:38,221 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:38,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:38,221 INFO L85 PathProgramCache]: Analyzing trace with hash -686232931, now seen corresponding path program 1 times [2023-11-29 05:30:38,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:38,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641119577] [2023-11-29 05:30:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:38,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641119577] [2023-11-29 05:30:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641119577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629410383] [2023-11-29 05:30:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:38,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:38,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:38,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:38,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:30:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:38,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:30:38,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:38,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:39,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629410383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:39,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:39,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-29 05:30:39,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682656261] [2023-11-29 05:30:39,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:39,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:30:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:30:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:30:39,067 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:39,198 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2023-11-29 05:30:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 05:30:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 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 41 [2023-11-29 05:30:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:39,201 INFO L225 Difference]: With dead ends: 87 [2023-11-29 05:30:39,201 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 05:30:39,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:30:39,203 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:39,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:30:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 05:30:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-29 05:30:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-11-29 05:30:39,217 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 41 [2023-11-29 05:30:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:39,217 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-11-29 05:30:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-11-29 05:30:39,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 05:30:39,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:39,220 INFO L195 NwaCegarLoop]: trace histogram [32, 30, 3, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:39,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:30:39,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:39,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:39,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash -466526515, now seen corresponding path program 2 times [2023-11-29 05:30:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372721240] [2023-11-29 05:30:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372721240] [2023-11-29 05:30:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372721240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805834974] [2023-11-29 05:30:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:30:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:40,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:30:40,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:30:40,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:40,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:30:40,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:40,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:41,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805834974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:41,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:41,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2023-11-29 05:30:41,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617768314] [2023-11-29 05:30:41,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:41,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 05:30:41,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:41,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 05:30:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 05:30:41,763 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:42,008 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2023-11-29 05:30:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 05:30:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 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 73 [2023-11-29 05:30:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:42,011 INFO L225 Difference]: With dead ends: 151 [2023-11-29 05:30:42,011 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 05:30:42,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 05:30:42,015 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:42,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:30:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 05:30:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-29 05:30:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2023-11-29 05:30:42,036 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 73 [2023-11-29 05:30:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:42,037 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2023-11-29 05:30:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2023-11-29 05:30:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 05:30:42,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:42,040 INFO L195 NwaCegarLoop]: trace histogram [64, 62, 3, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:42,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:30:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:42,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:42,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1907620051, now seen corresponding path program 3 times [2023-11-29 05:30:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805344548] [2023-11-29 05:30:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:42,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4102 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:30:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805344548] [2023-11-29 05:30:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805344548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296350746] [2023-11-29 05:30:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:30:44,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:44,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:30:44,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:30:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:44,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:30:44,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4102 backedges. 190 proven. 6 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-11-29 05:30:45,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4102 backedges. 190 proven. 6 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-11-29 05:30:45,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296350746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:45,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:45,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 5, 5] total 72 [2023-11-29 05:30:45,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086038251] [2023-11-29 05:30:45,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:45,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 05:30:45,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 05:30:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2124, Invalid=3132, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 05:30:45,345 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:47,297 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2023-11-29 05:30:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 05:30:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 0 states have call successors, (0), 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 137 [2023-11-29 05:30:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:47,299 INFO L225 Difference]: With dead ends: 164 [2023-11-29 05:30:47,300 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 05:30:47,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6597, Invalid=11763, Unknown=0, NotChecked=0, Total=18360 [2023-11-29 05:30:47,305 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:47,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:30:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 05:30:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2023-11-29 05:30:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2023-11-29 05:30:47,317 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 137 [2023-11-29 05:30:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2023-11-29 05:30:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2023-11-29 05:30:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 05:30:47,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:47,320 INFO L195 NwaCegarLoop]: trace histogram [65, 63, 8, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:47,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:30:47,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:47,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:47,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash -304206244, now seen corresponding path program 4 times [2023-11-29 05:30:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:47,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015376471] [2023-11-29 05:30:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:30:49,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015376471] [2023-11-29 05:30:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015376471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:30:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072719078] [2023-11-29 05:30:49,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:30:49,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:49,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:30:49,615 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:30:49,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:30:49,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:30:49,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:49,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 05:30:49,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:30:49,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:30:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072719078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:53,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:30:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2023-11-29 05:30:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974873626] [2023-11-29 05:30:53,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:53,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-11-29 05:30:53,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-11-29 05:30:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 05:30:53,794 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:30:54,183 INFO L93 Difference]: Finished difference Result 293 states and 364 transitions. [2023-11-29 05:30:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-29 05:30:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 0 states have call successors, (0), 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 144 [2023-11-29 05:30:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:30:54,186 INFO L225 Difference]: With dead ends: 293 [2023-11-29 05:30:54,186 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 05:30:54,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 05:30:54,191 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:30:54,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:30:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 05:30:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2023-11-29 05:30:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2023-11-29 05:30:54,221 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 144 [2023-11-29 05:30:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:30:54,221 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2023-11-29 05:30:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2023-11-29 05:30:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-29 05:30:54,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:30:54,227 INFO L195 NwaCegarLoop]: trace histogram [130, 128, 8, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:54,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 05:30:54,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:30:54,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:30:54,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1396712103, now seen corresponding path program 5 times [2023-11-29 05:30:54,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:54,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384929406] [2023-11-29 05:30:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:54,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16936 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:31:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:01,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384929406] [2023-11-29 05:31:01,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384929406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:31:01,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305526294] [2023-11-29 05:31:01,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:31:01,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:31:01,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:31:01,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:31:01,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 131 check-sat command(s) [2023-11-29 05:31:01,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:31:01,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 05:31:01,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:31:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16936 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:31:02,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:31:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16936 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:31:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305526294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:31:17,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:31:17,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 260 [2023-11-29 05:31:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641331556] [2023-11-29 05:31:17,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:31:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2023-11-29 05:31:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2023-11-29 05:31:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2023-11-29 05:31:17,548 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 261 states, 261 states have (on average 2.0268199233716473) internal successors, (529), 260 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:31:19,169 INFO L93 Difference]: Finished difference Result 553 states and 689 transitions. [2023-11-29 05:31:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2023-11-29 05:31:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0268199233716473) internal successors, (529), 260 states have internal predecessors, (529), 0 states have call successors, (0), 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 274 [2023-11-29 05:31:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:31:19,172 INFO L225 Difference]: With dead ends: 553 [2023-11-29 05:31:19,172 INFO L226 Difference]: Without dead ends: 535 [2023-11-29 05:31:19,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2023-11-29 05:31:19,176 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:31:19,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:31:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-11-29 05:31:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2023-11-29 05:31:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.0074906367041199) internal successors, (538), 534 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 538 transitions. [2023-11-29 05:31:19,206 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 538 transitions. Word has length 274 [2023-11-29 05:31:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:31:19,206 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 538 transitions. [2023-11-29 05:31:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0268199233716473) internal successors, (529), 260 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 538 transitions. [2023-11-29 05:31:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-11-29 05:31:19,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:31:19,215 INFO L195 NwaCegarLoop]: trace histogram [260, 258, 8, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:31:19,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:31:19,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:31:19,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:31:19,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1568094611, now seen corresponding path program 6 times [2023-11-29 05:31:19,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:31:19,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680851659] [2023-11-29 05:31:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:31:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 67636 backedges. 777 proven. 66822 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 05:31:51,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:51,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680851659] [2023-11-29 05:31:51,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680851659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:31:51,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266096738] [2023-11-29 05:31:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:31:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:31:51,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:31:51,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:31:51,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 05:31:51,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:31:51,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:31:51,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:31:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 67636 backedges. 778 proven. 36 refuted. 0 times theorem prover too weak. 66822 trivial. 0 not checked. [2023-11-29 05:31:53,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:31:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 67636 backedges. 778 proven. 36 refuted. 0 times theorem prover too weak. 66822 trivial. 0 not checked. [2023-11-29 05:31:55,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266096738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:31:55,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:31:55,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 10, 10] total 278 [2023-11-29 05:31:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860722132] [2023-11-29 05:31:55,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:31:55,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 279 states [2023-11-29 05:31:55,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 279 interpolants. [2023-11-29 05:31:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34119, Invalid=43443, Unknown=0, NotChecked=0, Total=77562 [2023-11-29 05:31:55,133 INFO L87 Difference]: Start difference. First operand 535 states and 538 transitions. Second operand has 279 states, 279 states have (on average 2.003584229390681) internal successors, (559), 278 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:32:23,230 INFO L93 Difference]: Finished difference Result 571 states and 591 transitions. [2023-11-29 05:32:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2023-11-29 05:32:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 279 states, 279 states have (on average 2.003584229390681) internal successors, (559), 278 states have internal predecessors, (559), 0 states have call successors, (0), 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 534 [2023-11-29 05:32:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:32:23,235 INFO L225 Difference]: With dead ends: 571 [2023-11-29 05:32:23,235 INFO L226 Difference]: Without dead ends: 553 [2023-11-29 05:32:23,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1585 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38374 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=105862, Invalid=183044, Unknown=0, NotChecked=0, Total=288906 [2023-11-29 05:32:23,250 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:32:23,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:32:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-11-29 05:32:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 547. [2023-11-29 05:32:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0073260073260073) internal successors, (550), 546 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 550 transitions. [2023-11-29 05:32:23,292 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 550 transitions. Word has length 534 [2023-11-29 05:32:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:32:23,292 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 550 transitions. [2023-11-29 05:32:23,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 279 states, 279 states have (on average 2.003584229390681) internal successors, (559), 278 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 550 transitions. [2023-11-29 05:32:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-11-29 05:32:23,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:32:23,296 INFO L195 NwaCegarLoop]: trace histogram [261, 259, 18, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:32:23,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:32:23,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:32:23,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:32:23,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:32:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 215113488, now seen corresponding path program 7 times [2023-11-29 05:32:23,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:32:23,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516440719] [2023-11-29 05:32:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:32:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:32:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:32:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 68292 backedges. 780 proven. 67340 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 05:32:56,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:32:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516440719] [2023-11-29 05:32:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516440719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:32:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147941600] [2023-11-29 05:32:56,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:32:56,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:32:56,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:32:56,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:32:56,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:32:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:32:56,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 261 conjunts are in the unsatisfiable core [2023-11-29 05:32:56,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:32:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 68292 backedges. 780 proven. 67340 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 05:32:57,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 68292 backedges. 780 proven. 67340 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 05:33:59,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147941600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:59,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:59,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [261, 261, 261] total 522 [2023-11-29 05:33:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405778957] [2023-11-29 05:33:59,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:59,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 523 states [2023-11-29 05:33:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 523 interpolants. [2023-11-29 05:33:59,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2023-11-29 05:33:59,514 INFO L87 Difference]: Start difference. First operand 547 states and 550 transitions. Second operand has 523 states, 523 states have (on average 2.0133843212237093) internal successors, (1053), 522 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:08,611 INFO L93 Difference]: Finished difference Result 1097 states and 1364 transitions. [2023-11-29 05:34:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 522 states. [2023-11-29 05:34:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 523 states, 523 states have (on average 2.0133843212237093) internal successors, (1053), 522 states have internal predecessors, (1053), 0 states have call successors, (0), 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 546 [2023-11-29 05:34:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:08,617 INFO L225 Difference]: With dead ends: 1097 [2023-11-29 05:34:08,617 INFO L226 Difference]: Without dead ends: 1069 [2023-11-29 05:34:08,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 82.2s TimeCoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2023-11-29 05:34:08,628 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:08,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:34:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2023-11-29 05:34:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2023-11-29 05:34:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 1.00374531835206) internal successors, (1072), 1068 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1072 transitions. [2023-11-29 05:34:08,689 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1072 transitions. Word has length 546 [2023-11-29 05:34:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:08,690 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1072 transitions. [2023-11-29 05:34:08,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 523 states, 523 states have (on average 2.0133843212237093) internal successors, (1053), 522 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1072 transitions. [2023-11-29 05:34:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2023-11-29 05:34:08,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:08,698 INFO L195 NwaCegarLoop]: trace histogram [522, 520, 18, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:08,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:34:08,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:34:08,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:34:08,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 26826753, now seen corresponding path program 8 times [2023-11-29 05:34:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:08,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110330067] [2023-11-29 05:34:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 272655 backedges. 1563 proven. 270920 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 05:36:46,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110330067] [2023-11-29 05:36:46,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110330067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125237259] [2023-11-29 05:36:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:36:46,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:46,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:46,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:46,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:36:47,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:36:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:36:47,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 2218 conjuncts, 522 conjunts are in the unsatisfiable core [2023-11-29 05:36:47,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 272655 backedges. 1563 proven. 270920 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 05:36:48,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 272655 backedges. 1563 proven. 270920 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 05:41:13,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125237259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:13,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:13,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [522, 522, 522] total 1044 [2023-11-29 05:41:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149925203] [2023-11-29 05:41:13,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1045 states [2023-11-29 05:41:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1045 interpolants. [2023-11-29 05:41:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545490, Invalid=545490, Unknown=0, NotChecked=0, Total=1090980 [2023-11-29 05:41:13,998 INFO L87 Difference]: Start difference. First operand 1069 states and 1072 transitions. Second operand has 1045 states, 1045 states have (on average 2.0066985645933015) internal successors, (2097), 1044 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:33,722 INFO L93 Difference]: Finished difference Result 2141 states and 2669 transitions. [2023-11-29 05:42:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1044 states. [2023-11-29 05:42:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 1045 states, 1045 states have (on average 2.0066985645933015) internal successors, (2097), 1044 states have internal predecessors, (2097), 0 states have call successors, (0), 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 1068 [2023-11-29 05:42:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:33,740 INFO L225 Difference]: With dead ends: 2141 [2023-11-29 05:42:33,740 INFO L226 Difference]: Without dead ends: 2113 [2023-11-29 05:42:33,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2656 GetRequests, 1613 SyntacticMatches, 0 SemanticMatches, 1043 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 347.5s TimeCoverageRelationStatistics Valid=545490, Invalid=545490, Unknown=0, NotChecked=0, Total=1090980 [2023-11-29 05:42:33,827 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:33,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 05:42:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2023-11-29 05:42:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2113. [2023-11-29 05:42:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 1.0018939393939394) internal successors, (2116), 2112 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 2116 transitions. [2023-11-29 05:42:34,036 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 2116 transitions. Word has length 1068 [2023-11-29 05:42:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:34,038 INFO L495 AbstractCegarLoop]: Abstraction has 2113 states and 2116 transitions. [2023-11-29 05:42:34,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 1045 states, 1045 states have (on average 2.0066985645933015) internal successors, (2097), 1044 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 2116 transitions. [2023-11-29 05:42:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2113 [2023-11-29 05:42:34,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:34,076 INFO L195 NwaCegarLoop]: trace histogram [1044, 1042, 18, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:34,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:42:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2fff-9c9e-43c1-89de-617e1b90047a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:42:34,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:34,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1602228701, now seen corresponding path program 9 times [2023-11-29 05:42:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:34,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552251337] [2023-11-29 05:42:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat