./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/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_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/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_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/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 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:09:38,856 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:09:38,923 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:09:38,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:09:38,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:09:38,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:09:38,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:09:38,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:09:38,955 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:09:38,955 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:09:38,956 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:09:38,956 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:09:38,957 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:09:38,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:09:38,958 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:09:38,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:09:38,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:09:38,960 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:09:38,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:09:38,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:09:38,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:09:38,962 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:09:38,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:09:38,963 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:09:38,963 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:09:38,964 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:09:38,964 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:09:38,964 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:09:38,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:09:38,965 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:09:38,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:09:38,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:09:38,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:09:38,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:09:38,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:09:38,968 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:09:38,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:09:38,975 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:09:38,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:09:38,976 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:09:38,976 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:09:38,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:09:38,977 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_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade [2023-11-29 01:09:39,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:09:39,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:09:39,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:09:39,241 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:09:39,242 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:09:39,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-11-29 01:09:42,057 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:09:42,207 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:09:42,207 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-11-29 01:09:42,214 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/data/7dfc237fb/4eb48890768445e69e788c62f9443090/FLAG762bc99a2 [2023-11-29 01:09:42,227 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/data/7dfc237fb/4eb48890768445e69e788c62f9443090 [2023-11-29 01:09:42,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:09:42,231 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:09:42,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:09:42,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:09:42,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:09:42,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fd9681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42, skipping insertion in model container [2023-11-29 01:09:42,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,258 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:09:42,402 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_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2023-11-29 01:09:42,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:09:42,424 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:09:42,436 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_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2023-11-29 01:09:42,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:09:42,453 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:09:42,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42 WrapperNode [2023-11-29 01:09:42,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:09:42,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:09:42,455 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:09:42,455 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:09:42,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,484 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2023-11-29 01:09:42,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:09:42,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:09:42,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:09:42,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:09:42,496 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,507 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 01:09:42,508 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,508 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:09:42,517 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:09:42,517 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:09:42,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:09:42,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (1/1) ... [2023-11-29 01:09:42,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:09:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:09:42,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:09:42,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:09:42,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:09:42,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:09:42,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:09:42,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:09:42,645 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:09:42,648 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:09:42,727 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:09:42,749 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:09:42,749 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:09:42,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:09:42 BoogieIcfgContainer [2023-11-29 01:09:42,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:09:42,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:09:42,753 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:09:42,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:09:42,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:09:42" (1/3) ... [2023-11-29 01:09:42,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587b9160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:09:42, skipping insertion in model container [2023-11-29 01:09:42,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:09:42" (2/3) ... [2023-11-29 01:09:42,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587b9160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:09:42, skipping insertion in model container [2023-11-29 01:09:42,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:09:42" (3/3) ... [2023-11-29 01:09:42,759 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2023-11-29 01:09:42,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:09:42,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:09:42,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:09:42,828 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;@52b8de94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:09:42,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:09:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:09:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 01:09:42,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:09:42,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:09:42,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:09:42,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash 56617893, now seen corresponding path program 1 times [2023-11-29 01:09:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:09:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030060624] [2023-11-29 01:09:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:09:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:09:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:09:43,115 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 01:09:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:09:43,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030060624] [2023-11-29 01:09:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030060624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:09:43,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:09:43,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:09:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883435322] [2023-11-29 01:09:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:09:43,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:09:43,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:09:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:09:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:09:43,155 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 01:09:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:09:43,183 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-29 01:09:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:09:43,187 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 01:09:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:09:43,196 INFO L225 Difference]: With dead ends: 15 [2023-11-29 01:09:43,196 INFO L226 Difference]: Without dead ends: 7 [2023-11-29 01:09:43,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:09:43,204 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:09:43,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:09:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-29 01:09:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-29 01:09:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:09:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-29 01:09:43,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-29 01:09:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:09:43,236 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-29 01:09:43,236 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 01:09:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-29 01:09:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 01:09:43,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:09:43,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 01:09:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:09:43,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:09:43,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:43,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1756820054, now seen corresponding path program 1 times [2023-11-29 01:09:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:09:43,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131605249] [2023-11-29 01:09:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:09:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:09:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:09:43,399 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 01:09:43,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:09:43,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131605249] [2023-11-29 01:09:43,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131605249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:09:43,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384468764] [2023-11-29 01:09:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:09:43,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:09:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:09:43,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:09:43,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:09:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:09:43,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:09:43,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:43,495 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 01:09:43,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:09:43,528 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 01:09:43,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384468764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:09:43,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:09:43,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 01:09:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959041991] [2023-11-29 01:09:43,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:09:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:09:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:09:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:09:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:09:43,533 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:09:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:09:43,576 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2023-11-29 01:09:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:09:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 01:09:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:09:43,577 INFO L225 Difference]: With dead ends: 14 [2023-11-29 01:09:43,577 INFO L226 Difference]: Without dead ends: 10 [2023-11-29 01:09:43,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:09:43,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 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 01:09:43,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:09:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-29 01:09:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-29 01:09:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:09:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-29 01:09:43,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2023-11-29 01:09:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:09:43,587 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-29 01:09:43,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:09:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-29 01:09:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 01:09:43,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:09:43,588 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-29 01:09:43,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:09:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:09:43,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:09:43,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 608473061, now seen corresponding path program 2 times [2023-11-29 01:09:43,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:09:43,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276967837] [2023-11-29 01:09:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:09:43,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:09:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:09:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:09:43,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:09:43,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276967837] [2023-11-29 01:09:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276967837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:09:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634411088] [2023-11-29 01:09:43,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:09:43,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:09:43,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:09:43,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:09:43,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:09:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:09:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:09:44,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:09:44,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:09:44,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:09:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:09:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634411088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:09:44,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:09:44,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 01:09:44,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177720403] [2023-11-29 01:09:44,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:09:44,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:09:44,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:09:44,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:09:44,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:09:44,172 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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 01:09:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:09:44,582 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2023-11-29 01:09:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:09:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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 9 [2023-11-29 01:09:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:09:44,583 INFO L225 Difference]: With dead ends: 20 [2023-11-29 01:09:44,583 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 01:09:44,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:09:44,586 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:09:44,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:09:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 01:09:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 01:09:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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 01:09:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-29 01:09:44,594 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2023-11-29 01:09:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:09:44,595 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-29 01:09:44,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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 01:09:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-29 01:09:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:09:44,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:09:44,596 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-29 01:09:44,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:09:44,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 01:09:44,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:09:44,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:09:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -973747643, now seen corresponding path program 3 times [2023-11-29 01:09:44,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:09:44,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620551375] [2023-11-29 01:09:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:09:44,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:09:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:09:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:09:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:09:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620551375] [2023-11-29 01:09:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620551375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:09:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735978820] [2023-11-29 01:09:45,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:09:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:09:45,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:09:45,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:09:45,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:09:45,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:09:45,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:09:45,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:09:45,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:09:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:09:45,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:09:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:09:45,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735978820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:09:45,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:09:45,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 26 [2023-11-29 01:09:45,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647860199] [2023-11-29 01:09:45,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:09:45,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:09:45,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:09:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:09:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:09:45,771 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:07,246 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-11-29 01:10:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:10:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 01:10:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:07,248 INFO L225 Difference]: With dead ends: 34 [2023-11-29 01:10:07,248 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 01:10:07,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:10:07,250 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:07,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 13 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:10:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 01:10:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 01:10:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-11-29 01:10:07,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15 [2023-11-29 01:10:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:07,261 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-11-29 01:10:07,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-11-29 01:10:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:10:07,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:07,263 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-11-29 01:10:07,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:10:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:07,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:07,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1601595141, now seen corresponding path program 4 times [2023-11-29 01:10:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:07,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626163825] [2023-11-29 01:10:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:07,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626163825] [2023-11-29 01:10:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626163825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112856930] [2023-11-29 01:10:07,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:10:07,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:07,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:08,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:10:08,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:10:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:08,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 01:10:08,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:08,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:09,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112856930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:09,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:09,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-29 01:10:09,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259249642] [2023-11-29 01:10:09,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 01:10:09,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 01:10:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:10:09,148 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:13,402 WARN L854 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967252) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967254) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-29 01:11:48,667 WARN L293 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 90 DAG size of output: 90 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:13:19,413 WARN L293 SmtUtils]: Spent 59.63s on a formula simplification. DAG size of input: 86 DAG size of output: 86 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:13:23,738 WARN L854 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-29 01:13:27,747 WARN L854 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-29 01:14:12,281 WARN L293 SmtUtils]: Spent 32.09s on a formula simplification. DAG size of input: 74 DAG size of output: 74 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:14:50,511 WARN L293 SmtUtils]: Spent 25.15s on a formula simplification. DAG size of input: 70 DAG size of output: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:15:11,419 WARN L293 SmtUtils]: Spent 15.92s on a formula simplification. DAG size of input: 66 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:15:31,080 WARN L293 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:15:42,927 WARN L293 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 58 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:15:55,044 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:16:19,630 WARN L854 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967252) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967254) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-29 01:16:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:16:19,635 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2023-11-29 01:16:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 01:16:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 01:16:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:16:19,636 INFO L225 Difference]: With dead ends: 56 [2023-11-29 01:16:19,636 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 01:16:19,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 368.5s TimeCoverageRelationStatistics Valid=1556, Invalid=3012, Unknown=4, NotChecked=540, Total=5112 [2023-11-29 01:16:19,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:16:19,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 588 Invalid, 0 Unknown, 133 Unchecked, 3.2s Time] [2023-11-29 01:16:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 01:16:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-29 01:16:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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 01:16:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2023-11-29 01:16:19,666 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 27 [2023-11-29 01:16:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:16:19,667 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2023-11-29 01:16:19,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:16:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2023-11-29 01:16:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:16:19,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:16:19,669 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-11-29 01:16:19,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:16:19,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:16:19,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:16:19,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:19,870 INFO L85 PathProgramCache]: Analyzing trace with hash 534265989, now seen corresponding path program 5 times [2023-11-29 01:16:19,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:19,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409357801] [2023-11-29 01:16:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:19,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:16:21,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:21,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409357801] [2023-11-29 01:16:21,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409357801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:16:21,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199830976] [2023-11-29 01:16:21,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:16:21,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:16:21,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:16:21,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:16:21,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c2fd437-bad6-41b7-b178-47ffcabf1d2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process