./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/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_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/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_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:57:38,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:57:38,269 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:57:38,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:57:38,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:57:38,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:57:38,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:57:38,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:57:38,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:57:38,297 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:57:38,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:57:38,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:57:38,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:57:38,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:57:38,300 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:57:38,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:57:38,301 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:57:38,301 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:57:38,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:57:38,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:57:38,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:57:38,304 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:57:38,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:57:38,305 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:57:38,305 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:57:38,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:57:38,306 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:57:38,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:57:38,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:57:38,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:57:38,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:57:38,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:57:38,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:57:38,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:57:38,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:57:38,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:57:38,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:57:38,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:57:38,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:57:38,309 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:57:38,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:57:38,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:57:38,310 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_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2023-11-29 02:57:38,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:57:38,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:57:38,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:57:38,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:57:38,568 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:57:38,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops/n.c24.i [2023-11-29 02:57:41,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:57:41,510 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:57:41,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/sv-benchmarks/c/loops/n.c24.i [2023-11-29 02:57:41,522 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/data/142c5c40b/450918ab415b432b9a0bb3419bc9a4ec/FLAG2fbf94cad [2023-11-29 02:57:41,892 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/data/142c5c40b/450918ab415b432b9a0bb3419bc9a4ec [2023-11-29 02:57:41,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:57:41,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:57:41,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:57:41,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:57:41,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:57:41,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:57:41" (1/1) ... [2023-11-29 02:57:41,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eea7a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:41, skipping insertion in model container [2023-11-29 02:57:41,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:57:41" (1/1) ... [2023-11-29 02:57:41,930 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:57:42,096 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_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/sv-benchmarks/c/loops/n.c24.i[805,818] [2023-11-29 02:57:42,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:57:42,159 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:57:42,174 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_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/sv-benchmarks/c/loops/n.c24.i[805,818] [2023-11-29 02:57:42,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:57:42,217 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:57:42,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42 WrapperNode [2023-11-29 02:57:42,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:57:42,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:57:42,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:57:42,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:57:42,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,260 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 158 [2023-11-29 02:57:42,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:57:42,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:57:42,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:57:42,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:57:42,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,272 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,289 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 9, 2]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 5, 1]. [2023-11-29 02:57:42,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,302 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:57:42,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:57:42,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:57:42,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:57:42,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (1/1) ... [2023-11-29 02:57:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:57:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:42,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:57:42,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:57:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:57:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2023-11-29 02:57:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2023-11-29 02:57:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2023-11-29 02:57:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2023-11-29 02:57:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:57:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:57:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:57:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:57:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:57:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:57:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:57:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:57:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2023-11-29 02:57:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2023-11-29 02:57:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2023-11-29 02:57:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2023-11-29 02:57:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:57:42,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:57:42,469 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:57:42,471 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:57:42,668 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:57:42,705 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:57:42,705 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 02:57:42,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:57:42 BoogieIcfgContainer [2023-11-29 02:57:42,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:57:42,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:57:42,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:57:42,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:57:42,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:57:41" (1/3) ... [2023-11-29 02:57:42,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d76743f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:57:42, skipping insertion in model container [2023-11-29 02:57:42,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:57:42" (2/3) ... [2023-11-29 02:57:42,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d76743f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:57:42, skipping insertion in model container [2023-11-29 02:57:42,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:57:42" (3/3) ... [2023-11-29 02:57:42,717 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2023-11-29 02:57:42,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:57:42,741 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:57:42,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:57:42,796 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;@1d21c18d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:57:42,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:57:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 02:57:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:57:42,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:42,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:42,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:42,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash -230994160, now seen corresponding path program 1 times [2023-11-29 02:57:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:42,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651267058] [2023-11-29 02:57:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:42,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:43,063 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 02:57:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651267058] [2023-11-29 02:57:43,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651267058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:57:43,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:57:43,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:57:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103373217] [2023-11-29 02:57:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:57:43,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:57:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:57:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:57:43,111 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 02:57:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:43,194 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2023-11-29 02:57:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:57:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-29 02:57:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:43,205 INFO L225 Difference]: With dead ends: 74 [2023-11-29 02:57:43,206 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 02:57:43,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:57:43,212 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:43,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:57:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 02:57:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2023-11-29 02:57:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 02:57:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-29 02:57:43,252 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2023-11-29 02:57:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:43,252 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-29 02:57:43,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 02:57:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-29 02:57:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 02:57:43,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:43,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:43,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:57:43,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:43,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1551984996, now seen corresponding path program 1 times [2023-11-29 02:57:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:43,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392980888] [2023-11-29 02:57:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:57:43,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392980888] [2023-11-29 02:57:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392980888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694919236] [2023-11-29 02:57:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:43,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:43,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:57:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:43,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:57:43,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:57:43,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:57:43,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694919236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:43,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:57:43,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 02:57:43,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601338545] [2023-11-29 02:57:43,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:43,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:57:43,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:57:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:57:43,557 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:43,669 INFO L93 Difference]: Finished difference Result 108 states and 160 transitions. [2023-11-29 02:57:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:57:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 02:57:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:43,671 INFO L225 Difference]: With dead ends: 108 [2023-11-29 02:57:43,671 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 02:57:43,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:57:43,674 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:43,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 105 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:57:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 02:57:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-29 02:57:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 02:57:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2023-11-29 02:57:43,690 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 13 [2023-11-29 02:57:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:43,690 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2023-11-29 02:57:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2023-11-29 02:57:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 02:57:43,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:43,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:43,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:57:43,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:43,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:43,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:43,898 INFO L85 PathProgramCache]: Analyzing trace with hash -370254069, now seen corresponding path program 2 times [2023-11-29 02:57:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:43,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743760692] [2023-11-29 02:57:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:43,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 02:57:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743760692] [2023-11-29 02:57:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743760692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:57:44,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:57:44,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:57:44,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139402910] [2023-11-29 02:57:44,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:57:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:57:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:57:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:57:44,151 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 02:57:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:44,201 INFO L93 Difference]: Finished difference Result 158 states and 231 transitions. [2023-11-29 02:57:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:57:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 31 [2023-11-29 02:57:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:44,204 INFO L225 Difference]: With dead ends: 158 [2023-11-29 02:57:44,204 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 02:57:44,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:57:44,206 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:44,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:57:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 02:57:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 85. [2023-11-29 02:57:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 02:57:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2023-11-29 02:57:44,224 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 123 transitions. Word has length 31 [2023-11-29 02:57:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:44,224 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 123 transitions. [2023-11-29 02:57:44,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 02:57:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2023-11-29 02:57:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:57:44,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:44,226 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:57:44,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:44,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1016351884, now seen corresponding path program 1 times [2023-11-29 02:57:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592148523] [2023-11-29 02:57:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:57:44,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592148523] [2023-11-29 02:57:44,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592148523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:44,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990254029] [2023-11-29 02:57:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:44,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:44,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:44,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:57:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:44,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:57:44,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:57:44,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:57:44,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990254029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:44,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:57:44,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 02:57:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905736512] [2023-11-29 02:57:44,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:44,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:57:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:57:44,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:57:44,577 INFO L87 Difference]: Start difference. First operand 85 states and 123 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 02:57:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:44,802 INFO L93 Difference]: Finished difference Result 298 states and 445 transitions. [2023-11-29 02:57:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:57:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) Word has length 35 [2023-11-29 02:57:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:44,804 INFO L225 Difference]: With dead ends: 298 [2023-11-29 02:57:44,805 INFO L226 Difference]: Without dead ends: 219 [2023-11-29 02:57:44,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:57:44,807 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 702 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:44,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 210 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:57:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-29 02:57:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2023-11-29 02:57:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4696969696969697) internal successors, (291), 198 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 02:57:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 291 transitions. [2023-11-29 02:57:44,833 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 291 transitions. Word has length 35 [2023-11-29 02:57:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:44,833 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 291 transitions. [2023-11-29 02:57:44,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 02:57:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 291 transitions. [2023-11-29 02:57:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 02:57:44,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:44,838 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:44,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:57:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:45,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:45,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash -838044372, now seen corresponding path program 2 times [2023-11-29 02:57:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351387269] [2023-11-29 02:57:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-29 02:57:45,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:45,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351387269] [2023-11-29 02:57:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351387269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:45,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277203644] [2023-11-29 02:57:45,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:57:45,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:45,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:45,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:45,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:57:45,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:57:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:57:45,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:57:45,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-29 02:57:45,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-29 02:57:45,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277203644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:45,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:57:45,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-29 02:57:45,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281242837] [2023-11-29 02:57:45,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:45,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:57:45,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:57:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:57:45,891 INFO L87 Difference]: Start difference. First operand 199 states and 291 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:46,395 INFO L93 Difference]: Finished difference Result 652 states and 979 transitions. [2023-11-29 02:57:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:57:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-29 02:57:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:46,398 INFO L225 Difference]: With dead ends: 652 [2023-11-29 02:57:46,399 INFO L226 Difference]: Without dead ends: 465 [2023-11-29 02:57:46,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:57:46,401 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1690 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:46,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 429 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:57:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-29 02:57:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2023-11-29 02:57:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.471830985915493) internal successors, (627), 426 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 02:57:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 627 transitions. [2023-11-29 02:57:46,438 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 627 transitions. Word has length 71 [2023-11-29 02:57:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:46,439 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 627 transitions. [2023-11-29 02:57:46,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 627 transitions. [2023-11-29 02:57:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 02:57:46,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:46,447 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:46,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:57:46,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:46,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:46,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash 254447212, now seen corresponding path program 3 times [2023-11-29 02:57:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:46,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476345066] [2023-11-29 02:57:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:46,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2023-11-29 02:57:47,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476345066] [2023-11-29 02:57:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476345066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863658864] [2023-11-29 02:57:47,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:57:47,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:47,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:47,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:57:48,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:57:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:57:48,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:57:48,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2023-11-29 02:57:48,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2023-11-29 02:57:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863658864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:48,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:57:48,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 33 [2023-11-29 02:57:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020103521] [2023-11-29 02:57:48,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:48,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 02:57:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 02:57:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:57:48,389 INFO L87 Difference]: Start difference. First operand 427 states and 627 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 02:57:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:54,480 INFO L93 Difference]: Finished difference Result 2229 states and 3325 transitions. [2023-11-29 02:57:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-11-29 02:57:54,481 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-11-29 02:57:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:54,492 INFO L225 Difference]: With dead ends: 2229 [2023-11-29 02:57:54,492 INFO L226 Difference]: Without dead ends: 1820 [2023-11-29 02:57:54,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11093 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8191, Invalid=22609, Unknown=0, NotChecked=0, Total=30800 [2023-11-29 02:57:54,506 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12533 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12533 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:54,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12533 Valid, 537 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:57:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2023-11-29 02:57:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 488. [2023-11-29 02:57:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.486652977412731) internal successors, (724), 487 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 02:57:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 724 transitions. [2023-11-29 02:57:54,559 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 724 transitions. Word has length 143 [2023-11-29 02:57:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:54,560 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 724 transitions. [2023-11-29 02:57:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 02:57:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 724 transitions. [2023-11-29 02:57:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-29 02:57:54,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:54,563 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:54,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:57:54,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:57:54,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:54,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2047865216, now seen corresponding path program 4 times [2023-11-29 02:57:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:54,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80984551] [2023-11-29 02:57:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:54,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-29 02:57:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:55,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80984551] [2023-11-29 02:57:55,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80984551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:55,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307223245] [2023-11-29 02:57:55,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:57:55,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:55,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:55,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:55,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:57:56,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:57:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:57:56,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:57:56,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-29 02:57:56,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-29 02:57:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307223245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:57:56,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:57:56,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 51 [2023-11-29 02:57:56,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029315220] [2023-11-29 02:57:56,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:57:56,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 02:57:56,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 02:57:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:57:56,944 INFO L87 Difference]: Start difference. First operand 488 states and 724 transitions. Second operand has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 02:57:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:58,454 INFO L93 Difference]: Finished difference Result 2553 states and 3999 transitions. [2023-11-29 02:57:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 02:57:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 0 states have call successors, (0), 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 161 [2023-11-29 02:57:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:58,468 INFO L225 Difference]: With dead ends: 2553 [2023-11-29 02:57:58,468 INFO L226 Difference]: Without dead ends: 2090 [2023-11-29 02:57:58,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:57:58,472 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2892 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:58,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2892 Valid, 894 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:57:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2023-11-29 02:57:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 963. [2023-11-29 02:57:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.4802494802494803) internal successors, (1424), 962 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 02:57:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1424 transitions. [2023-11-29 02:57:58,594 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1424 transitions. Word has length 161 [2023-11-29 02:57:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:58,594 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1424 transitions. [2023-11-29 02:57:58,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 02:57:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1424 transitions. [2023-11-29 02:57:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-11-29 02:57:58,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:58,601 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:58,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:57:58,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:57:58,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:58,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash -348907185, now seen corresponding path program 5 times [2023-11-29 02:57:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114671459] [2023-11-29 02:57:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:58,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2023-11-29 02:58:01,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114671459] [2023-11-29 02:58:01,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114671459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427639665] [2023-11-29 02:58:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:58:01,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:01,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:01,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:58:58,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-11-29 02:58:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:58:58,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 02:58:58,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2023-11-29 02:58:58,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:59:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2023-11-29 02:59:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427639665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:59:00,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:59:00,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-29 02:59:00,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977887209] [2023-11-29 02:59:00,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:59:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 02:59:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:59:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 02:59:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 02:59:00,464 INFO L87 Difference]: Start difference. First operand 963 states and 1424 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 02:59:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:59:09,519 INFO L93 Difference]: Finished difference Result 5078 states and 7949 transitions. [2023-11-29 02:59:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 02:59:09,519 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 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 311 [2023-11-29 02:59:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:59:09,544 INFO L225 Difference]: With dead ends: 5078 [2023-11-29 02:59:09,544 INFO L226 Difference]: Without dead ends: 4165 [2023-11-29 02:59:09,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 02:59:09,550 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10608 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10608 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:59:09,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10608 Valid, 1800 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:59:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2023-11-29 02:59:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 1913. [2023-11-29 02:59:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.4769874476987448) internal successors, (2824), 1912 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states 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 02:59:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2824 transitions. [2023-11-29 02:59:09,744 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2824 transitions. Word has length 311 [2023-11-29 02:59:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:59:09,744 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 2824 transitions. [2023-11-29 02:59:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 02:59:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2824 transitions. [2023-11-29 02:59:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-11-29 02:59:09,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:59:09,763 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:59:09,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:59:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:09,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:59:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:59:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1932069167, now seen corresponding path program 6 times [2023-11-29 02:59:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:59:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747685580] [2023-11-29 02:59:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:59:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:59:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 24279 trivial. 0 not checked. [2023-11-29 02:59:19,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:59:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747685580] [2023-11-29 02:59:19,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747685580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:59:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745296304] [2023-11-29 02:59:19,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:59:19,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:19,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:59:19,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:59:19,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:59:19,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 02:59:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:59:19,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:59:19,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:59:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 680 proven. 28 refuted. 0 times theorem prover too weak. 28422 trivial. 0 not checked. [2023-11-29 02:59:20,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:59:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 680 proven. 28 refuted. 0 times theorem prover too weak. 28422 trivial. 0 not checked. [2023-11-29 02:59:20,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745296304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:59:20,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:59:20,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9, 9] total 115 [2023-11-29 02:59:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884054399] [2023-11-29 02:59:20,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:59:20,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-11-29 02:59:20,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:59:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-11-29 02:59:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5127, Invalid=7983, Unknown=0, NotChecked=0, Total=13110 [2023-11-29 02:59:20,602 INFO L87 Difference]: Start difference. First operand 1913 states and 2824 transitions. Second operand has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 03:10:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:10:26,529 INFO L93 Difference]: Finished difference Result 19609 states and 29634 transitions. [2023-11-29 03:10:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2023-11-29 03:10:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 0 states have call successors, (0), 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 611 [2023-11-29 03:10:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:10:26,604 INFO L225 Difference]: With dead ends: 19609 [2023-11-29 03:10:26,604 INFO L226 Difference]: Without dead ends: 17784 [2023-11-29 03:10:26,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3422 GetRequests, 1810 SyntacticMatches, 0 SemanticMatches, 1612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213250 ImplicationChecksByTransitivity, 285.0s TimeCoverageRelationStatistics Valid=622983, Invalid=1980399, Unknown=0, NotChecked=0, Total=2603382 [2023-11-29 03:10:26,789 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 151146 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 5691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151146 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 7093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 5691 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:10:26,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151146 Valid, 1834 Invalid, 7093 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [5691 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 03:10:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17784 states. [2023-11-29 03:10:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17784 to 2016. [2023-11-29 03:10:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 1.4838709677419355) internal successors, (2990), 2015 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states 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 03:10:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 2990 transitions. [2023-11-29 03:10:27,254 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 2990 transitions. Word has length 611 [2023-11-29 03:10:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:10:27,255 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 2990 transitions. [2023-11-29 03:10:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 03:10:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 2990 transitions. [2023-11-29 03:10:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 03:10:27,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:10:27,269 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:27,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:10:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:10:27,470 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:10:27,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1757537850, now seen corresponding path program 7 times [2023-11-29 03:10:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:10:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193965587] [2023-11-29 03:10:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:10:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30474 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 25524 trivial. 0 not checked. [2023-11-29 03:10:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:10:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193965587] [2023-11-29 03:10:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193965587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:10:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779273767] [2023-11-29 03:10:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:10:36,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:10:36,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:10:36,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:10:36,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa2d0e1-5e91-4713-b8bb-e34f6f6f4c2a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:10:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:36,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 03:10:36,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30474 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 25524 trivial. 0 not checked. [2023-11-29 03:10:36,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:10:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30474 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 25524 trivial. 0 not checked. [2023-11-29 03:10:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779273767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:10:46,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:10:46,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-11-29 03:10:46,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883800210] [2023-11-29 03:10:46,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:10:46,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-29 03:10:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:10:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-29 03:10:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 03:10:46,081 INFO L87 Difference]: Start difference. First operand 2016 states and 2990 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)