./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/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_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/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_94de31e5-89c9-4c24-ad7e-e6618f4d5779/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 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:48:49,530 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:48:49,605 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:48:49,610 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:48:49,610 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:48:49,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:48:49,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:48:49,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:48:49,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:48:49,641 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:48:49,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:48:49,642 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:48:49,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:48:49,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:48:49,644 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:48:49,645 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:48:49,645 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:48:49,646 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:48:49,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:48:49,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:48:49,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:48:49,648 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:48:49,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:48:49,649 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:48:49,649 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:48:49,649 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:48:49,650 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:48:49,650 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:48:49,651 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:48:49,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:48:49,651 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:48:49,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:48:49,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:48:49,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:48:49,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:48:49,653 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:48:49,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:48:49,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:48:49,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:48:49,654 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:48:49,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:48:49,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:48:49,654 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_94de31e5-89c9-4c24-ad7e-e6618f4d5779/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 [2023-11-29 06:48:49,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:48:49,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:48:49,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:48:49,956 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:48:49,957 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:48:49,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/float-benchs/divmul_diverge.c [2023-11-29 06:48:52,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:48:53,066 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:48:53,066 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/sv-benchmarks/c/float-benchs/divmul_diverge.c [2023-11-29 06:48:53,075 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/data/04a808a06/90a9fae26d9d42499517a793d21d7177/FLAG1f8f68c2d [2023-11-29 06:48:53,093 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/data/04a808a06/90a9fae26d9d42499517a793d21d7177 [2023-11-29 06:48:53,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:48:53,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:48:53,099 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:48:53,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:48:53,106 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:48:53,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173e2b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53, skipping insertion in model container [2023-11-29 06:48:53,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,135 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:48:53,338 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_94de31e5-89c9-4c24-ad7e-e6618f4d5779/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2023-11-29 06:48:53,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:48:53,361 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:48:53,372 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_94de31e5-89c9-4c24-ad7e-e6618f4d5779/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2023-11-29 06:48:53,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:48:53,389 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:48:53,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53 WrapperNode [2023-11-29 06:48:53,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:48:53,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:48:53,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:48:53,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:48:53,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,420 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 44 [2023-11-29 06:48:53,421 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:48:53,422 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:48:53,422 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:48:53,422 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:48:53,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,433 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,444 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 06:48:53,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:48:53,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:48:53,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:48:53,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:48:53,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (1/1) ... [2023-11-29 06:48:53,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:48:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:53,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:48:53,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:48:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:48:53,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:48:53,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:48:53,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:48:53,595 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:48:53,597 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:48:53,703 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:48:53,729 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:48:53,730 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:48:53,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:53 BoogieIcfgContainer [2023-11-29 06:48:53,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:48:53,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:48:53,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:48:53,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:48:53,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:48:53" (1/3) ... [2023-11-29 06:48:53,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6b1889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:53, skipping insertion in model container [2023-11-29 06:48:53,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:53" (2/3) ... [2023-11-29 06:48:53,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6b1889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:53, skipping insertion in model container [2023-11-29 06:48:53,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:53" (3/3) ... [2023-11-29 06:48:53,740 INFO L112 eAbstractionObserver]: Analyzing ICFG divmul_diverge.c [2023-11-29 06:48:53,759 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:48:53,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:48:53,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:48:53,815 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;@7e005380, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:48:53,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:48:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 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 06:48:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 06:48:53,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:53,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:48:53,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:53,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:53,833 INFO L85 PathProgramCache]: Analyzing trace with hash 74151882, now seen corresponding path program 1 times [2023-11-29 06:48:53,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25577994] [2023-11-29 06:48:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:54,016 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 06:48:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25577994] [2023-11-29 06:48:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25577994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:54,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343655714] [2023-11-29 06:48:54,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:54,065 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 06:48:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:54,102 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-11-29 06:48:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-29 06:48:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:54,114 INFO L225 Difference]: With dead ends: 28 [2023-11-29 06:48:54,115 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 06:48:54,118 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 06:48:54,122 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:54,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:48:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 06:48:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2023-11-29 06:48:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-29 06:48:54,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2023-11-29 06:48:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:54,163 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-29 06:48:54,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 06:48:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-29 06:48:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:48:54,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:54,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:54,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:48:54,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:54,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1346780655, now seen corresponding path program 1 times [2023-11-29 06:48:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128802046] [2023-11-29 06:48:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:54,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:54,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:54,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128802046] [2023-11-29 06:48:54,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128802046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491774469] [2023-11-29 06:48:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:54,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:54,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:54,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:48:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:54,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:48:54,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:54,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:54,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491774469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:54,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:54,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 06:48:54,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793534308] [2023-11-29 06:48:54,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:54,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:48:54,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:54,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:48:54,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:48:54,417 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 06:48:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:54,449 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-29 06:48:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:48:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 06:48:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:54,451 INFO L225 Difference]: With dead ends: 30 [2023-11-29 06:48:54,451 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 06:48:54,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:48:54,453 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:54,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:48:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 06:48:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 06:48:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 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 06:48:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-29 06:48:54,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2023-11-29 06:48:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:54,460 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-29 06:48:54,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 06:48:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-29 06:48:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 06:48:54,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:54,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-11-29 06:48:54,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:48:54,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:54,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:54,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1799615222, now seen corresponding path program 2 times [2023-11-29 06:48:54,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:54,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79725871] [2023-11-29 06:48:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:54,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:54,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79725871] [2023-11-29 06:48:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79725871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57676055] [2023-11-29 06:48:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:48:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:54,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:54,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:48:54,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:48:54,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:54,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:48:54,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:54,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57676055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:54,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:48:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854866246] [2023-11-29 06:48:54,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:54,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:48:54,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:48:54,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:48:54,997 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:55,056 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2023-11-29 06:48:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:48:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 06:48:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:55,058 INFO L225 Difference]: With dead ends: 60 [2023-11-29 06:48:55,058 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 06:48:55,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 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 06:48:55,060 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:55,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:48:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 06:48:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 06:48:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:48:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-29 06:48:55,071 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 17 [2023-11-29 06:48:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:55,072 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-29 06:48:55,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-29 06:48:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 06:48:55,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:55,075 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2023-11-29 06:48:55,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:48:55,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:55,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:55,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:55,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1147606806, now seen corresponding path program 3 times [2023-11-29 06:48:55,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:55,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20782271] [2023-11-29 06:48:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:55,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20782271] [2023-11-29 06:48:55,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20782271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721845491] [2023-11-29 06:48:55,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:48:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:55,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:55,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:48:55,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 06:48:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:55,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:48:55,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:55,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:56,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721845491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:56,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:56,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-29 06:48:56,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652228162] [2023-11-29 06:48:56,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:56,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:48:56,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:48:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:48:56,030 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 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 06:48:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:56,163 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2023-11-29 06:48:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:48:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 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 06:48:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:56,166 INFO L225 Difference]: With dead ends: 120 [2023-11-29 06:48:56,167 INFO L226 Difference]: Without dead ends: 116 [2023-11-29 06:48:56,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 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 06:48:56,169 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 163 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:56,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 114 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:48:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-29 06:48:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-29 06:48:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2) internal successors, (138), 115 states have internal predecessors, (138), 0 states have call successors, (0), 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 06:48:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2023-11-29 06:48:56,184 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 35 [2023-11-29 06:48:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:56,185 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2023-11-29 06:48:56,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 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 06:48:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2023-11-29 06:48:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 06:48:56,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:56,189 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1] [2023-11-29 06:48:56,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:48:56,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 06:48:56,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:56,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:56,391 INFO L85 PathProgramCache]: Analyzing trace with hash -942737238, now seen corresponding path program 4 times [2023-11-29 06:48:56,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:56,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213628846] [2023-11-29 06:48:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:56,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213628846] [2023-11-29 06:48:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213628846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937897939] [2023-11-29 06:48:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:48:57,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:57,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:57,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:48:57,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:48:57,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:57,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:48:57,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:57,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:58,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937897939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:58,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:58,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-29 06:48:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089800053] [2023-11-29 06:48:58,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:58,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 06:48:58,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 06:48:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:48:58,165 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 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 06:48:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:58,453 INFO L93 Difference]: Finished difference Result 240 states and 309 transitions. [2023-11-29 06:48:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 06:48:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 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 06:48:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:58,457 INFO L225 Difference]: With dead ends: 240 [2023-11-29 06:48:58,457 INFO L226 Difference]: Without dead ends: 236 [2023-11-29 06:48:58,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:48:58,460 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 622 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:58,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 200 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:48:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-29 06:48:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-29 06:48:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.2) internal successors, (282), 235 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 282 transitions. [2023-11-29 06:48:58,482 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 282 transitions. Word has length 71 [2023-11-29 06:48:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:58,483 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 282 transitions. [2023-11-29 06:48:58,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 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 06:48:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 282 transitions. [2023-11-29 06:48:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 06:48:58,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:58,487 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1] [2023-11-29 06:48:58,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:48:58,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:58,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:58,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:58,693 INFO L85 PathProgramCache]: Analyzing trace with hash -973834198, now seen corresponding path program 5 times [2023-11-29 06:48:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673816285] [2023-11-29 06:48:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:00,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673816285] [2023-11-29 06:49:00,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673816285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726231797] [2023-11-29 06:49:00,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:49:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:00,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:00,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:49:00,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-11-29 06:49:00,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:00,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 06:49:00,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:00,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:03,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726231797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:03,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-11-29 06:49:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308992233] [2023-11-29 06:49:03,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 06:49:03,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 06:49:03,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 06:49:03,180 INFO L87 Difference]: Start difference. First operand 236 states and 282 transitions. Second operand has 97 states, 97 states have (on average 2.9587628865979383) internal successors, (287), 96 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:04,516 INFO L93 Difference]: Finished difference Result 480 states and 621 transitions. [2023-11-29 06:49:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 06:49:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.9587628865979383) internal successors, (287), 96 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-11-29 06:49:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:04,520 INFO L225 Difference]: With dead ends: 480 [2023-11-29 06:49:04,520 INFO L226 Difference]: Without dead ends: 476 [2023-11-29 06:49:04,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 06:49:04,524 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1159 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:04,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 396 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:49:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-29 06:49:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2023-11-29 06:49:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.2) internal successors, (570), 475 states have internal predecessors, (570), 0 states have call successors, (0), 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 06:49:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 570 transitions. [2023-11-29 06:49:04,546 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 570 transitions. Word has length 143 [2023-11-29 06:49:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:04,547 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 570 transitions. [2023-11-29 06:49:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.9587628865979383) internal successors, (287), 96 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 570 transitions. [2023-11-29 06:49:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-29 06:49:04,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:04,555 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1] [2023-11-29 06:49:04,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:49:04,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:04,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:04,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2070214442, now seen corresponding path program 6 times [2023-11-29 06:49:04,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:04,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596236508] [2023-11-29 06:49:04,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:04,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:10,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:10,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596236508] [2023-11-29 06:49:10,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596236508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:10,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724262701] [2023-11-29 06:49:10,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:49:10,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:10,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:10,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:49:10,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2023-11-29 06:49:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:10,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 06:49:10,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:11,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:19,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724262701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:19,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2023-11-29 06:49:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790708759] [2023-11-29 06:49:19,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:19,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-29 06:49:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-29 06:49:19,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 06:49:19,846 INFO L87 Difference]: Start difference. First operand 476 states and 570 transitions. Second operand has 193 states, 193 states have (on average 2.9792746113989637) internal successors, (575), 192 states have internal predecessors, (575), 0 states have call successors, (0), 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 06:49:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:32,519 INFO L93 Difference]: Finished difference Result 960 states and 1245 transitions. [2023-11-29 06:49:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-11-29 06:49:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.9792746113989637) internal successors, (575), 192 states have internal predecessors, (575), 0 states have call successors, (0), 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 287 [2023-11-29 06:49:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:32,526 INFO L225 Difference]: With dead ends: 960 [2023-11-29 06:49:32,526 INFO L226 Difference]: Without dead ends: 956 [2023-11-29 06:49:32,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 06:49:32,530 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2914 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2914 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:32,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2914 Valid, 780 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:49:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-11-29 06:49:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2023-11-29 06:49:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.2) internal successors, (1146), 955 states have internal predecessors, (1146), 0 states have call successors, (0), 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 06:49:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1146 transitions. [2023-11-29 06:49:32,557 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1146 transitions. Word has length 287 [2023-11-29 06:49:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:32,558 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1146 transitions. [2023-11-29 06:49:32,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.9792746113989637) internal successors, (575), 192 states have internal predecessors, (575), 0 states have call successors, (0), 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 06:49:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1146 transitions. [2023-11-29 06:49:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2023-11-29 06:49:32,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:32,576 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 1, 1, 1, 1, 1] [2023-11-29 06:49:32,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:49:32,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:32,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash 484177194, now seen corresponding path program 7 times [2023-11-29 06:49:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580518112] [2023-11-29 06:49:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54055 backedges. 0 proven. 54055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580518112] [2023-11-29 06:49:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580518112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730546184] [2023-11-29 06:49:53,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:49:53,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:53,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:53,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:53,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:49:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:54,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 192 conjunts are in the unsatisfiable core [2023-11-29 06:49:54,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 54055 backedges. 0 proven. 54055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:54,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 54055 backedges. 0 proven. 54055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:50:29,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730546184] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:29,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:50:29,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2023-11-29 06:50:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942844301] [2023-11-29 06:50:29,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:29,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-11-29 06:50:29,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-11-29 06:50:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-11-29 06:50:29,283 INFO L87 Difference]: Start difference. First operand 956 states and 1146 transitions. Second operand has 385 states, 385 states have (on average 2.9896103896103896) internal successors, (1151), 384 states have internal predecessors, (1151), 0 states have call successors, (0), 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 06:53:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:53:42,210 INFO L93 Difference]: Finished difference Result 1920 states and 2493 transitions. [2023-11-29 06:53:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-11-29 06:53:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.9896103896103896) internal successors, (1151), 384 states have internal predecessors, (1151), 0 states have call successors, (0), 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 575 [2023-11-29 06:53:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:53:42,221 INFO L225 Difference]: With dead ends: 1920 [2023-11-29 06:53:42,221 INFO L226 Difference]: Without dead ends: 1916 [2023-11-29 06:53:42,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1340 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-11-29 06:53:42,232 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5644 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5644 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:53:42,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5644 Valid, 1556 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:53:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2023-11-29 06:53:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1916. [2023-11-29 06:53:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 1.2) internal successors, (2298), 1915 states have internal predecessors, (2298), 0 states have call successors, (0), 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 06:53:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2298 transitions. [2023-11-29 06:53:42,281 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2298 transitions. Word has length 575 [2023-11-29 06:53:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:53:42,282 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 2298 transitions. [2023-11-29 06:53:42,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.9896103896103896) internal successors, (1151), 384 states have internal predecessors, (1151), 0 states have call successors, (0), 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 06:53:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2298 transitions. [2023-11-29 06:53:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2023-11-29 06:53:42,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:53:42,292 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 1, 1, 1, 1, 1] [2023-11-29 06:53:42,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:53:42,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:42,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:53:42,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash -903745238, now seen corresponding path program 8 times [2023-11-29 06:53:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:53:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909104174] [2023-11-29 06:53:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:53:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 218695 backedges. 0 proven. 218695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909104174] [2023-11-29 06:55:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909104174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911798662] [2023-11-29 06:55:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:32,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:32,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94de31e5-89c9-4c24-ad7e-e6618f4d5779/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:55:32,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:55:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:32,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 384 conjunts are in the unsatisfiable core [2023-11-29 06:55:32,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 218695 backedges. 0 proven. 218695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:33,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:57:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 218695 backedges. 0 proven. 218695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:53,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911798662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:57:53,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:57:53,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2023-11-29 06:57:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937270635] [2023-11-29 06:57:53,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:57:53,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2023-11-29 06:57:53,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2023-11-29 06:57:54,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2023-11-29 06:57:54,067 INFO L87 Difference]: Start difference. First operand 1916 states and 2298 transitions. Second operand has 769 states, 769 states have (on average 2.9947984395318596) internal successors, (2303), 768 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)