./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU --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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:03:00,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:03:00,275 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:03:00,281 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:03:00,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:03:00,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:03:00,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:03:00,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:03:00,312 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:03:00,313 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:03:00,313 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:03:00,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:03:00,315 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:03:00,320 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:03:00,320 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:03:00,321 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:03:00,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:03:00,321 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:03:00,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:03:00,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:03:00,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:03:00,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:03:00,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:03:00,323 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:03:00,323 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:03:00,324 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:03:00,324 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:03:00,324 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:03:00,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:03:00,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:03:00,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:03:00,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:03:00,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:00,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:03:00,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:03:00,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:03:00,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:03:00,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:03:00,328 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:03:00,328 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:03:00,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:03:00,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:03:00,329 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_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2024-10-31 22:03:00,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:03:00,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:03:00,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:03:00,641 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:03:00,643 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:03:00,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/loop-acceleration/array_4.i Unable to find full path for "g++" [2024-10-31 22:03:02,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:03:02,893 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:03:02,895 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/sv-benchmarks/c/loop-acceleration/array_4.i [2024-10-31 22:03:02,911 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/data/469b30fc0/9b2701be8e694783bde657a96f59de8f/FLAG6b391d64e [2024-10-31 22:03:02,935 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/data/469b30fc0/9b2701be8e694783bde657a96f59de8f [2024-10-31 22:03:02,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:03:02,940 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:03:02,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:02,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:03:02,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:03:02,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:02" (1/1) ... [2024-10-31 22:03:02,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43fa471f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:02, skipping insertion in model container [2024-10-31 22:03:02,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:02" (1/1) ... [2024-10-31 22:03:02,981 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:03:03,209 WARN L251 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_4c309dd9-faee-4239-bde2-a99da3868f57/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2024-10-31 22:03:03,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:03,242 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:03:03,257 WARN L251 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_4c309dd9-faee-4239-bde2-a99da3868f57/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2024-10-31 22:03:03,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:03,285 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:03:03,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03 WrapperNode [2024-10-31 22:03:03,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:03,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:03,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:03:03,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:03:03,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,306 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,328 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-10-31 22:03:03,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:03,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:03:03,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:03:03,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:03:03,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,344 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,360 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:03:03,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,382 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:03:03,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:03:03,387 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:03:03,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:03:03,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (1/1) ... [2024-10-31 22:03:03,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:03,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:03:03,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:03:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:03:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:03:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:03:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:03:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:03:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:03:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:03:03,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:03:03,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:03:03,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:03:03,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:03:03,559 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:03:03,562 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:03:03,696 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-31 22:03:03,696 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:03:03,709 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:03:03,709 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:03:03,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:03 BoogieIcfgContainer [2024-10-31 22:03:03,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:03:03,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:03:03,713 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:03:03,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:03:03,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:03:02" (1/3) ... [2024-10-31 22:03:03,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e06fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:03, skipping insertion in model container [2024-10-31 22:03:03,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:03" (2/3) ... [2024-10-31 22:03:03,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e06fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:03, skipping insertion in model container [2024-10-31 22:03:03,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:03" (3/3) ... [2024-10-31 22:03:03,720 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2024-10-31 22:03:03,742 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:03:03,743 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:03:03,810 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:03:03,818 INFO L333 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, 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;@6d4f1b75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:03:03,819 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:03:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:03:03,832 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:03,833 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:03,835 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:03,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 212257263, now seen corresponding path program 1 times [2024-10-31 22:03:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:03,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819718050] [2024-10-31 22:03:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:04,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819718050] [2024-10-31 22:03:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819718050] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:04,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:04,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:03:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452435999] [2024-10-31 22:03:04,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:04,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:03:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:04,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:03:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:03:04,163 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:04,214 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2024-10-31 22:03:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:03:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:03:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:04,241 INFO L225 Difference]: With dead ends: 34 [2024-10-31 22:03:04,242 INFO L226 Difference]: Without dead ends: 18 [2024-10-31 22:03:04,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:03:04,255 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:04,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:03:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-31 22:03:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2024-10-31 22:03:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-10-31 22:03:04,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2024-10-31 22:03:04,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:04,301 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-10-31 22:03:04,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-10-31 22:03:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:03:04,303 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:04,303 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:04,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:03:04,304 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:04,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1562582865, now seen corresponding path program 1 times [2024-10-31 22:03:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787378454] [2024-10-31 22:03:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:04,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787378454] [2024-10-31 22:03:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787378454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749152068] [2024-10-31 22:03:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:04,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:04,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:03:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:04,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:03:04,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:04,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:04,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749152068] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:04,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:04,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:03:04,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937770742] [2024-10-31 22:03:04,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:04,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:03:04,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:03:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:04,704 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2024-10-31 22:03:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:04,809 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-10-31 22:03:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:03:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 11 [2024-10-31 22:03:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:04,813 INFO L225 Difference]: With dead ends: 43 [2024-10-31 22:03:04,813 INFO L226 Difference]: Without dead ends: 35 [2024-10-31 22:03:04,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:04,817 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:04,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:03:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-31 22:03:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2024-10-31 22:03:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-10-31 22:03:04,826 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2024-10-31 22:03:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:04,827 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-10-31 22:03:04,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2024-10-31 22:03:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-10-31 22:03:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:03:04,828 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:04,828 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:04,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:03:05,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-31 22:03:05,034 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:05,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash -10610165, now seen corresponding path program 2 times [2024-10-31 22:03:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:05,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804901489] [2024-10-31 22:03:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:05,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:03:05,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:05,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804901489] [2024-10-31 22:03:05,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804901489] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:05,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:05,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:03:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708934519] [2024-10-31 22:03:05,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:05,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:03:05,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:03:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:03:05,324 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:05,364 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-10-31 22:03:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:03:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-31 22:03:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:05,367 INFO L225 Difference]: With dead ends: 26 [2024-10-31 22:03:05,367 INFO L226 Difference]: Without dead ends: 22 [2024-10-31 22:03:05,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:03:05,369 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:05,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:03:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-31 22:03:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-10-31 22:03:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-10-31 22:03:05,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2024-10-31 22:03:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:05,380 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-10-31 22:03:05,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-10-31 22:03:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-31 22:03:05,381 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:05,381 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:05,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:03:05,383 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:05,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -907607845, now seen corresponding path program 1 times [2024-10-31 22:03:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321215737] [2024-10-31 22:03:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:03:05,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:05,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321215737] [2024-10-31 22:03:05,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321215737] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:05,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484154140] [2024-10-31 22:03:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:05,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:05,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:05,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:03:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:05,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:03:05,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:03:05,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:03:05,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484154140] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:05,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2024-10-31 22:03:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039147499] [2024-10-31 22:03:05,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:05,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:03:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:03:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:03:05,890 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:06,052 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2024-10-31 22:03:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:03:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-31 22:03:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:06,054 INFO L225 Difference]: With dead ends: 81 [2024-10-31 22:03:06,054 INFO L226 Difference]: Without dead ends: 61 [2024-10-31 22:03:06,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:03:06,056 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:06,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 46 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:03:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-31 22:03:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-10-31 22:03:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-10-31 22:03:06,072 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 20 [2024-10-31 22:03:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:06,073 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-10-31 22:03:06,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-10-31 22:03:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-31 22:03:06,074 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:06,074 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:06,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:03:06,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:06,276 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:06,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash 933738495, now seen corresponding path program 2 times [2024-10-31 22:03:06,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:06,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145125454] [2024-10-31 22:03:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-31 22:03:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:06,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145125454] [2024-10-31 22:03:06,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145125454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:06,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810685754] [2024-10-31 22:03:06,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:03:06,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:06,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:06,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:06,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:03:06,845 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:03:06,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:03:06,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:03:06,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-31 22:03:06,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-31 22:03:07,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810685754] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:07,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:07,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-31 22:03:07,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968563401] [2024-10-31 22:03:07,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:07,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:03:07,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:03:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:03:07,267 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:07,527 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2024-10-31 22:03:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 22:03:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 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 59 [2024-10-31 22:03:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:07,529 INFO L225 Difference]: With dead ends: 170 [2024-10-31 22:03:07,529 INFO L226 Difference]: Without dead ends: 133 [2024-10-31 22:03:07,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:03:07,530 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 175 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:07,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 55 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:03:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-31 22:03:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 84. [2024-10-31 22:03:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2024-10-31 22:03:07,543 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 59 [2024-10-31 22:03:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:07,544 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2024-10-31 22:03:07,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2024-10-31 22:03:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-31 22:03:07,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:07,546 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:07,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:03:07,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:07,750 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:07,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1105658393, now seen corresponding path program 3 times [2024-10-31 22:03:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427489375] [2024-10-31 22:03:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-31 22:03:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427489375] [2024-10-31 22:03:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427489375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119302044] [2024-10-31 22:03:08,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:03:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:08,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:03:09,012 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-31 22:03:09,013 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:03:09,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:03:09,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-10-31 22:03:09,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-10-31 22:03:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119302044] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:09,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 38 [2024-10-31 22:03:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353544701] [2024-10-31 22:03:09,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:09,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-31 22:03:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-31 22:03:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 22:03:09,710 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:10,163 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2024-10-31 22:03:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-31 22:03:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 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 83 [2024-10-31 22:03:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:10,166 INFO L225 Difference]: With dead ends: 239 [2024-10-31 22:03:10,169 INFO L226 Difference]: Without dead ends: 177 [2024-10-31 22:03:10,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 22:03:10,172 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 142 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:10,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 77 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:03:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-31 22:03:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2024-10-31 22:03:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2024-10-31 22:03:10,206 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 83 [2024-10-31 22:03:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:10,207 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2024-10-31 22:03:10,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2024-10-31 22:03:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-10-31 22:03:10,215 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:10,216 INFO L215 NwaCegarLoop]: trace histogram [35, 34, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:10,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:03:10,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:03:10,418 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:10,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:10,419 INFO L85 PathProgramCache]: Analyzing trace with hash -341612077, now seen corresponding path program 4 times [2024-10-31 22:03:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:10,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678116504] [2024-10-31 22:03:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:10,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2024-10-31 22:03:12,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:12,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678116504] [2024-10-31 22:03:12,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678116504] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251715914] [2024-10-31 22:03:12,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:03:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:12,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:12,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:12,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:03:12,426 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:03:12,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:03:12,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-31 22:03:12,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2024-10-31 22:03:12,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2024-10-31 22:03:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251715914] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:14,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:14,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-10-31 22:03:14,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541165897] [2024-10-31 22:03:14,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:14,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-31 22:03:14,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-31 22:03:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-10-31 22:03:14,780 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:15,869 INFO L93 Difference]: Finished difference Result 482 states and 549 transitions. [2024-10-31 22:03:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-31 22:03:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 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 175 [2024-10-31 22:03:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:15,872 INFO L225 Difference]: With dead ends: 482 [2024-10-31 22:03:15,872 INFO L226 Difference]: Without dead ends: 373 [2024-10-31 22:03:15,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-10-31 22:03:15,875 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 583 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:15,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 126 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:03:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-10-31 22:03:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 244. [2024-10-31 22:03:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2024-10-31 22:03:15,902 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 175 [2024-10-31 22:03:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:15,902 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2024-10-31 22:03:15,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2024-10-31 22:03:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-10-31 22:03:15,907 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:15,907 INFO L215 NwaCegarLoop]: trace histogram [66, 66, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:15,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:03:16,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:16,111 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:16,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1238761585, now seen corresponding path program 5 times [2024-10-31 22:03:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:16,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076549621] [2024-10-31 22:03:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:16,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2024-10-31 22:03:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076549621] [2024-10-31 22:03:21,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076549621] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763347883] [2024-10-31 22:03:21,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:03:21,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:21,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:21,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c309dd9-faee-4239-bde2-a99da3868f57/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process