./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/recHanoi03-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi03-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI --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 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:50:55,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:50:55,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:50:55,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:50:55,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:50:55,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:50:55,427 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:50:55,427 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:50:55,428 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:50:55,433 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:50:55,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:50:55,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:50:55,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:50:55,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:50:55,438 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:50:55,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:50:55,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:50:55,440 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:50:55,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:50:55,441 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:50:55,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:50:55,442 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:50:55,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:50:55,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:50:55,445 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:50:55,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:50:55,445 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:50:55,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:50:55,447 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:50:55,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:50:55,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:50:55,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:50:55,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:50:55,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:50:55,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:50:55,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:50:55,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:50:55,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:50:55,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:50:55,451 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:50:55,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:50:55,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:50:55,452 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_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2023-11-24 21:50:55,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:50:55,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:50:55,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:50:55,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:50:55,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:50:55,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/recursive/recHanoi03-2.c [2023-11-24 21:50:58,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:50:59,111 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:50:59,112 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/sv-benchmarks/c/recursive/recHanoi03-2.c [2023-11-24 21:50:59,120 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/data/cf9dc4aa5/73828d26303e49f7be1992f3a77f61f4/FLAGa49701b89 [2023-11-24 21:50:59,135 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/data/cf9dc4aa5/73828d26303e49f7be1992f3a77f61f4 [2023-11-24 21:50:59,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:50:59,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:50:59,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:50:59,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:50:59,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:50:59,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3606ea95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59, skipping insertion in model container [2023-11-24 21:50:59,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,172 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:50:59,330 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_fc0e2d08-5f1a-4751-9802-2d112cec2f42/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2023-11-24 21:50:59,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:50:59,349 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:50:59,365 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_fc0e2d08-5f1a-4751-9802-2d112cec2f42/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2023-11-24 21:50:59,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:50:59,387 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:50:59,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59 WrapperNode [2023-11-24 21:50:59,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:50:59,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:50:59,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:50:59,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:50:59,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,412 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,434 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-11-24 21:50:59,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:50:59,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:50:59,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:50:59,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:50:59,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,450 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,462 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]. [2023-11-24 21:50:59,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,466 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:50:59,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:50:59,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:50:59,489 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:50:59,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (1/1) ... [2023-11-24 21:50:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:50:59,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:59,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:50:59,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:50:59,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:50:59,581 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2023-11-24 21:50:59,582 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2023-11-24 21:50:59,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:50:59,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:50:59,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:50:59,662 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:50:59,665 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:50:59,825 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:50:59,861 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:50:59,864 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:50:59,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:50:59 BoogieIcfgContainer [2023-11-24 21:50:59,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:50:59,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:50:59,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:50:59,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:50:59,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:50:59" (1/3) ... [2023-11-24 21:50:59,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f66d0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:50:59, skipping insertion in model container [2023-11-24 21:50:59,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:59" (2/3) ... [2023-11-24 21:50:59,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f66d0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:50:59, skipping insertion in model container [2023-11-24 21:50:59,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:50:59" (3/3) ... [2023-11-24 21:50:59,878 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2023-11-24 21:50:59,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:50:59,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:50:59,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:50:59,972 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;@b699877, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:50:59,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:50:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:50:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:50:59,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:50:59,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:59,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:50:59,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:59,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1546859687, now seen corresponding path program 1 times [2023-11-24 21:51:00,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:00,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318803966] [2023-11-24 21:51:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:00,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:00,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318803966] [2023-11-24 21:51:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318803966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:00,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:00,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:51:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283778915] [2023-11-24 21:51:00,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:00,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:51:00,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:51:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:51:00,574 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:51:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:00,717 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-24 21:51:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:51:00,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-24 21:51:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:00,728 INFO L225 Difference]: With dead ends: 24 [2023-11-24 21:51:00,728 INFO L226 Difference]: Without dead ends: 15 [2023-11-24 21:51:00,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:00,735 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:00,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-24 21:51:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-24 21:51:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:51:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-24 21:51:00,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-11-24 21:51:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:00,775 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-24 21:51:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:51:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-24 21:51:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:51:00,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:00,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:00,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:51:00,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:51:00,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash -797183849, now seen corresponding path program 1 times [2023-11-24 21:51:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:00,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330622960] [2023-11-24 21:51:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:00,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:00,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:01,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:51:01,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:01,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330622960] [2023-11-24 21:51:01,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330622960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:01,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057665246] [2023-11-24 21:51:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:01,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:01,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:01,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:51:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:01,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:51:01,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:51:01,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:51:01,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057665246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:01,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:51:01,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2023-11-24 21:51:01,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722441132] [2023-11-24 21:51:01,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:01,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:51:01,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:51:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:51:01,939 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:51:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:02,193 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-24 21:51:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:51:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 16 [2023-11-24 21:51:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:02,196 INFO L225 Difference]: With dead ends: 27 [2023-11-24 21:51:02,196 INFO L226 Difference]: Without dead ends: 21 [2023-11-24 21:51:02,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:51:02,233 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:02,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 53 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-24 21:51:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-24 21:51:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:51:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-24 21:51:02,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-11-24 21:51:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:02,241 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-24 21:51:02,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:51:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-24 21:51:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:51:02,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:02,243 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:02,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:02,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:51:02,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1671831511, now seen corresponding path program 2 times [2023-11-24 21:51:02,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:02,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650178868] [2023-11-24 21:51:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:02,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:02,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 21:51:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:03,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650178868] [2023-11-24 21:51:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650178868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597522703] [2023-11-24 21:51:03,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:51:03,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:03,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:03,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:51:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:51:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:51:03,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:51:03,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:51:03,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:51:04,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597522703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:04,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:51:04,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 31 [2023-11-24 21:51:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118310311] [2023-11-24 21:51:04,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:51:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:51:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:51:04,753 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 21 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:51:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:05,096 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-11-24 21:51:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 21:51:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 21 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) Word has length 28 [2023-11-24 21:51:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:05,098 INFO L225 Difference]: With dead ends: 36 [2023-11-24 21:51:05,099 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 21:51:05,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2023-11-24 21:51:05,102 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:05,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 94 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 21:51:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-24 21:51:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:51:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-11-24 21:51:05,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2023-11-24 21:51:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:05,111 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-11-24 21:51:05,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 21 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:51:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-11-24 21:51:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-24 21:51:05,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:05,113 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:05,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:05,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:05,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:51:05,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1245455975, now seen corresponding path program 3 times [2023-11-24 21:51:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:05,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361029082] [2023-11-24 21:51:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:05,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:05,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:05,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:05,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:06,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-24 21:51:06,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:06,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361029082] [2023-11-24 21:51:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361029082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:06,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621670220] [2023-11-24 21:51:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:51:06,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:06,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:06,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:06,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:51:06,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-24 21:51:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:51:06,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 21:51:06,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:51:07,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 21:51:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621670220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:12,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:51:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 46 [2023-11-24 21:51:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366165881] [2023-11-24 21:51:12,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-24 21:51:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-24 21:51:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2023-11-24 21:51:12,503 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 30 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-24 21:51:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:13,380 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-24 21:51:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 21:51:13,381 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 30 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) Word has length 46 [2023-11-24 21:51:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:13,382 INFO L225 Difference]: With dead ends: 54 [2023-11-24 21:51:13,383 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 21:51:13,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=646, Invalid=4046, Unknown=0, NotChecked=0, Total=4692 [2023-11-24 21:51:13,387 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:13,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 205 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:51:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 21:51:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-24 21:51:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 21:51:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-11-24 21:51:13,398 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2023-11-24 21:51:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:13,399 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-11-24 21:51:13,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 30 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-24 21:51:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-11-24 21:51:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-24 21:51:13,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:13,403 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:13,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:13,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-24 21:51:13,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:51:13,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash -828786649, now seen corresponding path program 4 times [2023-11-24 21:51:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33228808] [2023-11-24 21:51:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:13,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:15,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:15,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:15,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:15,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:15,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:16,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:16,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:16,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:51:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-24 21:51:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33228808] [2023-11-24 21:51:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33228808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698800987] [2023-11-24 21:51:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:51:16,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:16,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:16,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0e2d08-5f1a-4751-9802-2d112cec2f42/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:51:16,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:51:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:51:16,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-24 21:51:16,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-24 21:51:18,247 INFO L327 TraceCheckSpWp]: Computing backward predicates...