./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-2.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_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/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_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/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_ad3de160-f7cc-45a3-ba99-9e0f79026af8/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 fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:28:08,838 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:28:08,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:28:08,902 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:28:08,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:28:08,927 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:28:08,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:28:08,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:28:08,928 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:28:08,929 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:28:08,929 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:28:08,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:28:08,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:28:08,931 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:28:08,932 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:28:08,932 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:28:08,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:28:08,933 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:28:08,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:28:08,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:28:08,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:28:08,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:28:08,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:28:08,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:28:08,939 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:28:08,939 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:28:08,940 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:28:08,940 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:28:08,941 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:28:08,941 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:28:08,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:28:08,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:28:08,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:28:08,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:28:08,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:28:08,944 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:28:08,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:28:08,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:28:08,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:28:08,944 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:28:08,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:28:08,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:28:08,945 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_ad3de160-f7cc-45a3-ba99-9e0f79026af8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 [2023-11-29 05:28:09,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:28:09,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:28:09,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:28:09,196 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:28:09,197 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:28:09,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops/eureka_01-2.c [2023-11-29 05:28:11,974 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:28:12,141 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:28:12,141 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/sv-benchmarks/c/loops/eureka_01-2.c [2023-11-29 05:28:12,147 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/data/d4a9c5a66/1bc2fc63924b43638a3b1f43b9194a1b/FLAG6358c1b0a [2023-11-29 05:28:12,158 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/data/d4a9c5a66/1bc2fc63924b43638a3b1f43b9194a1b [2023-11-29 05:28:12,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:28:12,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:28:12,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:28:12,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:28:12,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:28:12,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6848f0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12, skipping insertion in model container [2023-11-29 05:28:12,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:28:12,298 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_ad3de160-f7cc-45a3-ba99-9e0f79026af8/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2023-11-29 05:28:12,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:28:12,338 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:28:12,348 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_ad3de160-f7cc-45a3-ba99-9e0f79026af8/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2023-11-29 05:28:12,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:28:12,383 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:28:12,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12 WrapperNode [2023-11-29 05:28:12,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:28:12,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:28:12,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:28:12,385 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:28:12,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,431 INFO L138 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 198 [2023-11-29 05:28:12,431 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:28:12,432 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:28:12,432 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:28:12,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:28:12,441 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,462 INFO L175 MemorySlicer]: Split 78 memory accesses to 5 slices as follows [2, 22, 23, 22, 9]. 29 percent of accesses are in the largest equivalence class. The 62 initializations are split as follows [2, 20, 20, 20, 0]. The 3 writes are split as follows [0, 0, 0, 0, 3]. [2023-11-29 05:28:12,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,479 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:28:12,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:28:12,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:28:12,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:28:12,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (1/1) ... [2023-11-29 05:28:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:28:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:12,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:28:12,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:28:12,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:28:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:28:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:28:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:28:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:28:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:28:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:28:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:28:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:28:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:28:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:28:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:28:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:28:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:28:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:28:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:28:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:28:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:28:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:28:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:28:12,652 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:28:12,654 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:28:12,847 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:28:12,893 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:28:12,894 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 05:28:12,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:28:12 BoogieIcfgContainer [2023-11-29 05:28:12,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:28:12,898 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:28:12,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:28:12,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:28:12,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:28:12" (1/3) ... [2023-11-29 05:28:12,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd95c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:28:12, skipping insertion in model container [2023-11-29 05:28:12,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:12" (2/3) ... [2023-11-29 05:28:12,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd95c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:28:12, skipping insertion in model container [2023-11-29 05:28:12,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:28:12" (3/3) ... [2023-11-29 05:28:12,905 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2023-11-29 05:28:12,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:28:12,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:28:12,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:28:12,978 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;@2e038aa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:28:12,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:28:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 05:28:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:28:12,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:12,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:12,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:12,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash 969093160, now seen corresponding path program 1 times [2023-11-29 05:28:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:13,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498848805] [2023-11-29 05:28:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:13,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:13,216 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 05:28:13,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:13,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498848805] [2023-11-29 05:28:13,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498848805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:13,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:13,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194873181] [2023-11-29 05:28:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:13,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:28:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:28:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:28:13,258 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 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 5.0) internal successors, (10), 2 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 05:28:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:13,286 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2023-11-29 05:28:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:28:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10 [2023-11-29 05:28:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:13,297 INFO L225 Difference]: With dead ends: 40 [2023-11-29 05:28:13,297 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 05:28:13,300 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 05:28:13,304 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:13,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:28:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 05:28:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 05:28:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 05:28:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-11-29 05:28:13,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2023-11-29 05:28:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:13,336 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-11-29 05:28:13,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 05:28:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-11-29 05:28:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:28:13,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:13,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:13,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:28:13,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:13,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 428348859, now seen corresponding path program 1 times [2023-11-29 05:28:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123082754] [2023-11-29 05:28:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:13,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:13,567 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 05:28:13,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123082754] [2023-11-29 05:28:13,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123082754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:13,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:13,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:13,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694393171] [2023-11-29 05:28:13,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:13,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:13,572 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 05:28:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:13,624 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2023-11-29 05:28:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) Word has length 10 [2023-11-29 05:28:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:13,626 INFO L225 Difference]: With dead ends: 37 [2023-11-29 05:28:13,626 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 05:28:13,627 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 05:28:13,628 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:13,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:28:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 05:28:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-29 05:28:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 05:28:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-29 05:28:13,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2023-11-29 05:28:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:13,636 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-29 05:28:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 05:28:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-29 05:28:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 05:28:13,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:13,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:13,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:28:13,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:13,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 980259699, now seen corresponding path program 1 times [2023-11-29 05:28:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:13,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643545921] [2023-11-29 05:28:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:28:13,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643545921] [2023-11-29 05:28:13,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643545921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:13,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:13,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215568369] [2023-11-29 05:28:13,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:13,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:13,767 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 05:28:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:13,829 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-11-29 05:28:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:28:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-29 05:28:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:13,831 INFO L225 Difference]: With dead ends: 44 [2023-11-29 05:28:13,831 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 05:28:13,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:13,833 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:13,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 19 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:28:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 05:28:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2023-11-29 05:28:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 05:28:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-29 05:28:13,840 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2023-11-29 05:28:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:13,841 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-29 05:28:13,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 05:28:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-29 05:28:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:28:13,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:13,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:13,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:28:13,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:13,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 263824409, now seen corresponding path program 1 times [2023-11-29 05:28:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994905441] [2023-11-29 05:28:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:28:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994905441] [2023-11-29 05:28:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994905441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:13,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:13,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:13,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187267330] [2023-11-29 05:28:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:13,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:13,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:13,938 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 05:28:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:13,976 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-29 05:28:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:28:13,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-29 05:28:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:13,977 INFO L225 Difference]: With dead ends: 38 [2023-11-29 05:28:13,977 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 05:28:13,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:13,979 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:13,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:28:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 05:28:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-29 05:28:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 05:28:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-29 05:28:13,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 16 [2023-11-29 05:28:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:13,986 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-29 05:28:13,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 05:28:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-29 05:28:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 05:28:13,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:13,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:28:13,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:13,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1728732986, now seen corresponding path program 1 times [2023-11-29 05:28:13,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:13,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273917416] [2023-11-29 05:28:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:13,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:14,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:14,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273917416] [2023-11-29 05:28:14,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273917416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:14,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:14,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:14,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105280566] [2023-11-29 05:28:14,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:14,083 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 05:28:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:14,147 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-29 05:28:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:28:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2023-11-29 05:28:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:14,149 INFO L225 Difference]: With dead ends: 42 [2023-11-29 05:28:14,149 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 05:28:14,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:14,151 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:14,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:28:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 05:28:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2023-11-29 05:28:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 05:28:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-29 05:28:14,158 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 19 [2023-11-29 05:28:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:14,159 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-29 05:28:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 05:28:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-29 05:28:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 05:28:14,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:14,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:28:14,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:14,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1802843216, now seen corresponding path program 1 times [2023-11-29 05:28:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274292017] [2023-11-29 05:28:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:14,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:14,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274292017] [2023-11-29 05:28:14,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274292017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345483955] [2023-11-29 05:28:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:14,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:14,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:14,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:28:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:14,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:28:14,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:14,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:14,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345483955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:14,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-29 05:28:14,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054076945] [2023-11-29 05:28:14,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:14,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:28:14,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:28:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:28:14,525 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 05:28:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:14,618 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2023-11-29 05:28:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:28:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 21 [2023-11-29 05:28:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:14,619 INFO L225 Difference]: With dead ends: 50 [2023-11-29 05:28:14,619 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 05:28:14,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:28:14,621 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:14,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 33 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:28:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 05:28:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 05:28:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 05:28:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-11-29 05:28:14,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 21 [2023-11-29 05:28:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:14,629 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-11-29 05:28:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 05:28:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-11-29 05:28:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:28:14,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:14,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:14,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:28:14,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:14,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:14,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash 228079768, now seen corresponding path program 2 times [2023-11-29 05:28:14,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:14,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540491788] [2023-11-29 05:28:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:14,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:28:14,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:14,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540491788] [2023-11-29 05:28:14,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540491788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580170401] [2023-11-29 05:28:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:28:14,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:14,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:14,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:28:15,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:28:15,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:15,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:28:15,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:28:15,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:28:15,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580170401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:15,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:28:15,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 05:28:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917446087] [2023-11-29 05:28:15,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:15,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:15,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:15,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:15,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:28:15,136 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 05:28:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:15,198 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2023-11-29 05:28:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:28:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) Word has length 30 [2023-11-29 05:28:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:15,199 INFO L225 Difference]: With dead ends: 69 [2023-11-29 05:28:15,199 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 05:28:15,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:28:15,201 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:15,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:28:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 05:28:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2023-11-29 05:28:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 05:28:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-11-29 05:28:15,209 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 30 [2023-11-29 05:28:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:15,209 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-11-29 05:28:15,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 05:28:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-11-29 05:28:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:28:15,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:15,211 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:15,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:28:15,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:15,412 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:15,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1101460646, now seen corresponding path program 1 times [2023-11-29 05:28:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450466523] [2023-11-29 05:28:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:15,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:15,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450466523] [2023-11-29 05:28:15,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450466523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665830421] [2023-11-29 05:28:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:15,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:15,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:15,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:28:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:15,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:28:15,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:15,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:28:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665830421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:15,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-29 05:28:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822032704] [2023-11-29 05:28:15,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:15,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:28:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:28:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:28:15,949 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 05:28:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:16,052 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-11-29 05:28:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:28:16,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 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 30 [2023-11-29 05:28:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:16,054 INFO L225 Difference]: With dead ends: 55 [2023-11-29 05:28:16,054 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 05:28:16,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:28:16,055 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:16,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 65 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:28:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 05:28:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-11-29 05:28:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 05:28:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-29 05:28:16,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 30 [2023-11-29 05:28:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:16,064 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-29 05:28:16,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 05:28:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-29 05:28:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 05:28:16,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:16,065 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:16,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:28:16,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:16,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:16,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash 439389136, now seen corresponding path program 2 times [2023-11-29 05:28:16,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:16,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969515063] [2023-11-29 05:28:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:16,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:28:16,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:16,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969515063] [2023-11-29 05:28:16,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969515063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:16,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626372632] [2023-11-29 05:28:16,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:28:16,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:16,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:16,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:16,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:28:16,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:28:16,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:16,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:28:16,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:28:16,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:28:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626372632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:16,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 05:28:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126049346] [2023-11-29 05:28:16,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:28:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:28:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:28:16,627 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 05:28:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:16,701 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2023-11-29 05:28:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:28:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 33 [2023-11-29 05:28:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:16,703 INFO L225 Difference]: With dead ends: 60 [2023-11-29 05:28:16,703 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 05:28:16,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:28:16,704 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:16,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:28:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 05:28:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 05:28:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-11-29 05:28:16,712 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2023-11-29 05:28:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:16,713 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-11-29 05:28:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 05:28:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-11-29 05:28:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 05:28:16,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:16,714 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:16,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 05:28:16,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:28:16,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:16,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash 538648239, now seen corresponding path program 3 times [2023-11-29 05:28:16,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:16,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781614619] [2023-11-29 05:28:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:28:17,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:17,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781614619] [2023-11-29 05:28:17,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781614619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:17,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561417771] [2023-11-29 05:28:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:28:17,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:17,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:17,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:28:17,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:28:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:17,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:28:17,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 05:28:17,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 05:28:17,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561417771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:17,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:17,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 13 [2023-11-29 05:28:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786720341] [2023-11-29 05:28:17,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:28:17,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:28:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:28:17,418 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:17,999 INFO L93 Difference]: Finished difference Result 159 states and 208 transitions. [2023-11-29 05:28:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:28:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-29 05:28:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:18,001 INFO L225 Difference]: With dead ends: 159 [2023-11-29 05:28:18,001 INFO L226 Difference]: Without dead ends: 134 [2023-11-29 05:28:18,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:28:18,003 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 539 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:18,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 48 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:28:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-29 05:28:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 103. [2023-11-29 05:28:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2843137254901962) internal successors, (131), 102 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 05:28:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2023-11-29 05:28:18,022 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 42 [2023-11-29 05:28:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:18,023 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2023-11-29 05:28:18,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2023-11-29 05:28:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 05:28:18,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:18,025 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:18,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:28:18,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:18,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:18,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1078809925, now seen corresponding path program 4 times [2023-11-29 05:28:18,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:18,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112086281] [2023-11-29 05:28:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:18,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2023-11-29 05:28:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112086281] [2023-11-29 05:28:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112086281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312761916] [2023-11-29 05:28:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:28:18,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:18,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:18,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:28:18,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:28:18,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:18,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:28:18,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 26 proven. 227 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-11-29 05:28:18,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 26 proven. 227 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-11-29 05:28:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312761916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:19,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:19,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2023-11-29 05:28:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372879879] [2023-11-29 05:28:19,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:28:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:28:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:28:19,132 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 05:28:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:20,103 INFO L93 Difference]: Finished difference Result 305 states and 399 transitions. [2023-11-29 05:28:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 05:28:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 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 101 [2023-11-29 05:28:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:20,105 INFO L225 Difference]: With dead ends: 305 [2023-11-29 05:28:20,105 INFO L226 Difference]: Without dead ends: 237 [2023-11-29 05:28:20,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1347, Invalid=4659, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 05:28:20,109 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1297 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 93 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:28:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-29 05:28:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 123. [2023-11-29 05:28:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2704918032786885) internal successors, (155), 122 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:28:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 155 transitions. [2023-11-29 05:28:20,132 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 155 transitions. Word has length 101 [2023-11-29 05:28:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:20,133 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 155 transitions. [2023-11-29 05:28:20,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 05:28:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 155 transitions. [2023-11-29 05:28:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 05:28:20,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:20,135 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:20,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:28:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:20,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:20,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1691455241, now seen corresponding path program 5 times [2023-11-29 05:28:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891325292] [2023-11-29 05:28:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2023-11-29 05:28:20,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:20,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891325292] [2023-11-29 05:28:20,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891325292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:20,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535591907] [2023-11-29 05:28:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:28:20,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:20,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:20,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:20,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:28:45,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-11-29 05:28:45,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:45,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:28:45,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 614 proven. 51 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-11-29 05:28:45,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 493 proven. 172 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-11-29 05:28:45,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535591907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:45,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:45,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-29 05:28:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994439377] [2023-11-29 05:28:45,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:45,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:28:45,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:28:45,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:28:45,951 INFO L87 Difference]: Start difference. First operand 123 states and 155 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 05:28:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:46,132 INFO L93 Difference]: Finished difference Result 304 states and 423 transitions. [2023-11-29 05:28:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:28:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 0 states have call successors, (0), 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 121 [2023-11-29 05:28:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:46,135 INFO L225 Difference]: With dead ends: 304 [2023-11-29 05:28:46,135 INFO L226 Difference]: Without dead ends: 219 [2023-11-29 05:28:46,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2023-11-29 05:28:46,136 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:46,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 74 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:28:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-29 05:28:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-29 05:28:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.298165137614679) internal successors, (283), 218 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 05:28:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 283 transitions. [2023-11-29 05:28:46,170 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 283 transitions. Word has length 121 [2023-11-29 05:28:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:46,171 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 283 transitions. [2023-11-29 05:28:46,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 05:28:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 283 transitions. [2023-11-29 05:28:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-29 05:28:46,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:46,175 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:46,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:28:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:46,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:46,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 855553271, now seen corresponding path program 6 times [2023-11-29 05:28:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734299802] [2023-11-29 05:28:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 1855 proven. 287 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2023-11-29 05:28:47,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734299802] [2023-11-29 05:28:47,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734299802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116054233] [2023-11-29 05:28:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:28:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:47,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:47,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:47,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:28:49,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-29 05:28:49,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:49,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:28:49,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2023-11-29 05:28:49,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2023-11-29 05:28:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116054233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:49,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:28:49,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 32 [2023-11-29 05:28:49,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579816585] [2023-11-29 05:28:49,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:49,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:28:49,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:28:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=780, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:28:49,759 INFO L87 Difference]: Start difference. First operand 219 states and 283 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:59,194 INFO L93 Difference]: Finished difference Result 1079 states and 1427 transitions. [2023-11-29 05:28:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2023-11-29 05:28:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2023-11-29 05:28:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:59,200 INFO L225 Difference]: With dead ends: 1079 [2023-11-29 05:28:59,200 INFO L226 Difference]: Without dead ends: 922 [2023-11-29 05:28:59,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26616 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=19974, Invalid=49458, Unknown=0, NotChecked=0, Total=69432 [2023-11-29 05:28:59,216 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3195 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3195 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:59,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3195 Valid, 90 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:28:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2023-11-29 05:28:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 247. [2023-11-29 05:28:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.2804878048780488) internal successors, (315), 246 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 05:28:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 315 transitions. [2023-11-29 05:28:59,262 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 315 transitions. Word has length 217 [2023-11-29 05:28:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:59,263 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 315 transitions. [2023-11-29 05:28:59,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 315 transitions. [2023-11-29 05:28:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-29 05:28:59,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:59,265 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:59,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:28:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:59,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1628110019, now seen corresponding path program 7 times [2023-11-29 05:28:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703837662] [2023-11-29 05:28:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2023-11-29 05:29:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703837662] [2023-11-29 05:29:00,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703837662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:00,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360899389] [2023-11-29 05:29:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:29:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:00,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:00,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:29:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:00,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:29:00,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2023-11-29 05:29:01,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2023-11-29 05:29:01,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360899389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:01,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:01,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2023-11-29 05:29:01,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153547838] [2023-11-29 05:29:01,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 05:29:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 05:29:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=923, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:29:01,526 INFO L87 Difference]: Start difference. First operand 247 states and 315 transitions. Second operand has 40 states, 40 states have (on average 3.425) internal successors, (137), 39 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 05:29:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:01,729 INFO L93 Difference]: Finished difference Result 489 states and 647 transitions. [2023-11-29 05:29:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:29:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 39 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 245 [2023-11-29 05:29:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:01,731 INFO L225 Difference]: With dead ends: 489 [2023-11-29 05:29:01,731 INFO L226 Difference]: Without dead ends: 307 [2023-11-29 05:29:01,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 456 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=737, Invalid=1155, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 05:29:01,732 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:01,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 86 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-29 05:29:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2023-11-29 05:29:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.2908496732026145) internal successors, (395), 306 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 05:29:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 395 transitions. [2023-11-29 05:29:01,777 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 395 transitions. Word has length 245 [2023-11-29 05:29:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:01,777 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 395 transitions. [2023-11-29 05:29:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 39 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 05:29:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 395 transitions. [2023-11-29 05:29:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-29 05:29:01,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:01,780 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:01,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:29:01,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:29:01,981 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:29:01,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1561023321, now seen corresponding path program 8 times [2023-11-29 05:29:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:01,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901875361] [2023-11-29 05:29:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2023-11-29 05:29:02,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901875361] [2023-11-29 05:29:02,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901875361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796620253] [2023-11-29 05:29:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:29:02,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:02,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:02,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:29:03,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:29:03,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:29:03,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:29:03,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2023-11-29 05:29:03,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2023-11-29 05:29:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796620253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:04,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:04,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-29 05:29:04,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329216633] [2023-11-29 05:29:04,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:04,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:29:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:29:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:29:04,309 INFO L87 Difference]: Start difference. First operand 307 states and 395 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 05:29:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:04,471 INFO L93 Difference]: Finished difference Result 427 states and 538 transitions. [2023-11-29 05:29:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 305 [2023-11-29 05:29:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:04,474 INFO L225 Difference]: With dead ends: 427 [2023-11-29 05:29:04,474 INFO L226 Difference]: Without dead ends: 391 [2023-11-29 05:29:04,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 598 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:29:04,476 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:04,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 84 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-29 05:29:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 370. [2023-11-29 05:29:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.2981029810298104) internal successors, (479), 369 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 05:29:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 479 transitions. [2023-11-29 05:29:04,535 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 479 transitions. Word has length 305 [2023-11-29 05:29:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:04,536 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 479 transitions. [2023-11-29 05:29:04,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 05:29:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 479 transitions. [2023-11-29 05:29:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-29 05:29:04,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:04,538 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:04,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:29:04,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:29:04,738 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:29:04,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash 726149133, now seen corresponding path program 9 times [2023-11-29 05:29:04,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:04,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873023368] [2023-11-29 05:29:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2023-11-29 05:29:05,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:05,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873023368] [2023-11-29 05:29:05,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873023368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:05,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102301854] [2023-11-29 05:29:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:29:05,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:05,825 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:05,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:29:06,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 05:29:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:29:06,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 05:29:06,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:06,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:29:06,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2023-11-29 05:29:09,386 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-11-29 05:29:09,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 22 [2023-11-29 05:29:09,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 05:29:09,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:09,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-29 05:29:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 524 proven. 4 refuted. 0 times theorem prover too weak. 15088 trivial. 0 not checked. [2023-11-29 05:29:09,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:23,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2023-11-29 05:29:23,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:23,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20002 treesize of output 18486 [2023-11-29 05:29:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 501 proven. 351 refuted. 0 times theorem prover too weak. 14764 trivial. 0 not checked. [2023-11-29 05:29:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102301854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:26,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 17] total 44 [2023-11-29 05:29:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260574014] [2023-11-29 05:29:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:26,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 05:29:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 05:29:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1646, Unknown=4, NotChecked=0, Total=1980 [2023-11-29 05:29:26,264 INFO L87 Difference]: Start difference. First operand 370 states and 479 transitions. Second operand has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 05:29:29,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:29:32,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:29:35,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:29:42,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:29:46,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:29:48,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:29:54,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:04,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:09,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:12,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:15,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:23,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:27,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:30:48,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 05:30:55,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 05:30:58,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:31:02,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:31:06,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:31:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:31:06,747 INFO L93 Difference]: Finished difference Result 1127 states and 1451 transitions. [2023-11-29 05:31:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-29 05:31:06,747 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 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 368 [2023-11-29 05:31:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:31:06,751 INFO L225 Difference]: With dead ends: 1127 [2023-11-29 05:31:06,751 INFO L226 Difference]: Without dead ends: 781 [2023-11-29 05:31:06,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 708 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7026 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=4919, Invalid=13702, Unknown=11, NotChecked=0, Total=18632 [2023-11-29 05:31:06,753 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1216 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 164 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:31:06,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 166 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 661 Invalid, 13 Unknown, 0 Unchecked, 56.2s Time] [2023-11-29 05:31:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2023-11-29 05:31:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 683. [2023-11-29 05:31:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 1.3049853372434017) internal successors, (890), 682 states have internal predecessors, (890), 0 states have call successors, (0), 0 states 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 05:31:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 890 transitions. [2023-11-29 05:31:06,871 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 890 transitions. Word has length 368 [2023-11-29 05:31:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:31:06,871 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 890 transitions. [2023-11-29 05:31:06,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 05:31:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 890 transitions. [2023-11-29 05:31:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-29 05:31:06,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:31:06,874 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 99, 17, 17, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:31:06,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:31:07,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:31:07,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:31:07,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1515170543, now seen corresponding path program 1 times [2023-11-29 05:31:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:31:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432835740] [2023-11-29 05:31:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:31:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 15709 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2023-11-29 05:31:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432835740] [2023-11-29 05:31:08,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432835740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:31:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777616630] [2023-11-29 05:31:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:08,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:08,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:31:08,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:31:08,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:31:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:09,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 2317 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:31:09,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:31:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15709 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2023-11-29 05:31:10,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:31:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15709 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2023-11-29 05:31:11,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777616630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:31:11,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:31:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2023-11-29 05:31:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716719337] [2023-11-29 05:31:11,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:31:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:31:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:31:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=1035, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:31:11,928 INFO L87 Difference]: Start difference. First operand 683 states and 890 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 05:31:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:31:13,701 INFO L93 Difference]: Finished difference Result 2886 states and 3797 transitions. [2023-11-29 05:31:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:31:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 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 374 [2023-11-29 05:31:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:31:13,713 INFO L225 Difference]: With dead ends: 2886 [2023-11-29 05:31:13,713 INFO L226 Difference]: Without dead ends: 2880 [2023-11-29 05:31:13,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 710 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=1155, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 05:31:13,714 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1261 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:31:13,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 189 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:31:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2023-11-29 05:31:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 689. [2023-11-29 05:31:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.302325581395349) internal successors, (896), 688 states have internal predecessors, (896), 0 states have call successors, (0), 0 states 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 05:31:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 896 transitions. [2023-11-29 05:31:13,890 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 896 transitions. Word has length 374 [2023-11-29 05:31:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:31:13,891 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 896 transitions. [2023-11-29 05:31:13,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 05:31:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 896 transitions. [2023-11-29 05:31:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-11-29 05:31:13,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:31:13,895 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 99, 20, 20, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:31:13,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:31:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:31:14,095 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:31:14,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 765685395, now seen corresponding path program 2 times [2023-11-29 05:31:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:31:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126067337] [2023-11-29 05:31:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:31:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 7679 proven. 1167 refuted. 0 times theorem prover too weak. 6974 trivial. 0 not checked. [2023-11-29 05:31:45,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:45,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126067337] [2023-11-29 05:31:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126067337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:31:45,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650395799] [2023-11-29 05:31:45,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:31:45,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:31:45,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:31:45,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:31:46,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:31:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:31:46,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 2359 conjuncts, 133 conjunts are in the unsatisfiable core [2023-11-29 05:31:46,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:32:05,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-29 05:32:08,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:08,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-11-29 05:32:08,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:08,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-11-29 05:32:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 4014 proven. 5814 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2023-11-29 05:32:08,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:32:10,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2023-11-29 05:32:10,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:32:10,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 169 [2023-11-29 05:32:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 200 proven. 5619 refuted. 0 times theorem prover too weak. 10001 trivial. 0 not checked. [2023-11-29 05:32:30,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650395799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:32:30,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:32:30,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33, 33] total 86 [2023-11-29 05:32:30,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871956991] [2023-11-29 05:32:30,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:32:30,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-11-29 05:32:30,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:32:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-11-29 05:32:30,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=7171, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 05:32:30,178 INFO L87 Difference]: Start difference. First operand 689 states and 896 transitions. Second operand has 87 states, 87 states have (on average 2.896551724137931) internal successors, (252), 86 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 05:33:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:01,256 INFO L93 Difference]: Finished difference Result 1344 states and 1755 transitions. [2023-11-29 05:33:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 05:33:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.896551724137931) internal successors, (252), 86 states have internal predecessors, (252), 0 states have call successors, (0), 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 380 [2023-11-29 05:33:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:01,261 INFO L225 Difference]: With dead ends: 1344 [2023-11-29 05:33:01,261 INFO L226 Difference]: Without dead ends: 975 [2023-11-29 05:33:01,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5230 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=1196, Invalid=23296, Unknown=0, NotChecked=0, Total=24492 [2023-11-29 05:33:01,264 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 170 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 7892 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 7897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:01,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2701 Invalid, 7897 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 7892 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2023-11-29 05:33:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-11-29 05:33:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 958. [2023-11-29 05:33:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.3072100313479624) internal successors, (1251), 957 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 05:33:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1251 transitions. [2023-11-29 05:33:01,658 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1251 transitions. Word has length 380 [2023-11-29 05:33:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:01,659 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 1251 transitions. [2023-11-29 05:33:01,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.896551724137931) internal successors, (252), 86 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 05:33:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1251 transitions. [2023-11-29 05:33:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-11-29 05:33:01,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:01,663 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 93, 20, 20, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:01,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:33:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:33:01,864 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:33:01,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -855832041, now seen corresponding path program 3 times [2023-11-29 05:33:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:01,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332966825] [2023-11-29 05:33:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 7762 proven. 628 refuted. 0 times theorem prover too weak. 7430 trivial. 0 not checked. [2023-11-29 05:33:45,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:45,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332966825] [2023-11-29 05:33:45,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332966825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:45,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725033323] [2023-11-29 05:33:45,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:33:45,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:45,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:45,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:45,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:33:46,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 05:33:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:46,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 05:33:46,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:10,064 INFO L349 Elim1Store]: treesize reduction 45, result has 40.8 percent of original size [2023-11-29 05:34:10,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-11-29 05:34:10,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:10,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 116 [2023-11-29 05:34:12,068 INFO L349 Elim1Store]: treesize reduction 360, result has 38.8 percent of original size [2023-11-29 05:34:12,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 243 treesize of output 351 [2023-11-29 05:34:12,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:12,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 248 [2023-11-29 05:34:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 299 proven. 1203 refuted. 0 times theorem prover too weak. 14318 trivial. 0 not checked. [2023-11-29 05:34:30,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:32,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2023-11-29 05:34:32,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:32,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 216 [2023-11-29 05:34:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 9 proven. 1284 refuted. 0 times theorem prover too weak. 14527 trivial. 0 not checked. [2023-11-29 05:34:48,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725033323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:48,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:48,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 15] total 46 [2023-11-29 05:34:48,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109594376] [2023-11-29 05:34:48,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:48,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 05:34:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 05:34:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2007, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 05:34:48,722 INFO L87 Difference]: Start difference. First operand 958 states and 1251 transitions. Second operand has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 05:39:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:20,470 INFO L93 Difference]: Finished difference Result 6351 states and 8010 transitions. [2023-11-29 05:39:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 611 states. [2023-11-29 05:39:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 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 380 [2023-11-29 05:39:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:20,489 INFO L225 Difference]: With dead ends: 6351 [2023-11-29 05:39:20,490 INFO L226 Difference]: Without dead ends: 5738 [2023-11-29 05:39:20,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1419 GetRequests, 765 SyntacticMatches, 0 SemanticMatches, 654 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199755 ImplicationChecksByTransitivity, 264.2s TimeCoverageRelationStatistics Valid=43753, Invalid=385927, Unknown=0, NotChecked=0, Total=429680 [2023-11-29 05:39:20,506 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2808 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 4267 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2808 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 5208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 4267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:20,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2808 Valid, 850 Invalid, 5208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 4267 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-11-29 05:39:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2023-11-29 05:39:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 1425. [2023-11-29 05:39:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.3019662921348314) internal successors, (1854), 1424 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 05:39:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1854 transitions. [2023-11-29 05:39:21,252 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1854 transitions. Word has length 380 [2023-11-29 05:39:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:21,252 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 1854 transitions. [2023-11-29 05:39:21,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 05:39:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1854 transitions. [2023-11-29 05:39:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-11-29 05:39:21,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:21,301 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 83, 20, 20, 17, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:21,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 05:39:21,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:21,502 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:21,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash -381740073, now seen corresponding path program 4 times [2023-11-29 05:39:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:21,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625890278] [2023-11-29 05:39:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 7612 proven. 5115 refuted. 0 times theorem prover too weak. 3093 trivial. 0 not checked. [2023-11-29 05:40:31,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625890278] [2023-11-29 05:40:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625890278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705570720] [2023-11-29 05:40:31,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:40:31,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:31,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:31,817 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:31,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3de160-f7cc-45a3-ba99-9e0f79026af8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process