./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx --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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:18:49,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:18:49,496 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:18:49,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:18:49,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:18:49,533 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:18:49,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:18:49,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:18:49,535 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:18:49,536 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:18:49,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:18:49,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:18:49,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:18:49,539 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:18:49,539 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:18:49,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:18:49,540 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:18:49,541 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:18:49,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:18:49,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:18:49,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:18:49,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:18:49,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:18:49,544 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:18:49,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:18:49,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:18:49,546 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:18:49,546 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:18:49,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:18:49,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:18:49,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:18:49,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:49,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:18:49,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:18:49,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:18:49,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:18:49,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:18:49,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:18:49,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:18:49,551 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:18:49,551 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:18:49,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:18:49,552 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_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2023-11-21 22:18:49,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:18:49,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:18:49,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:18:49,827 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:18:49,827 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:18:49,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/recursive/Ackermann03.c [2023-11-21 22:18:52,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:18:53,240 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:18:53,242 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/sv-benchmarks/c/recursive/Ackermann03.c [2023-11-21 22:18:53,251 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/data/7e9554a47/1946f986730d42abaf667c5ab7e83423/FLAG2110717e8 [2023-11-21 22:18:53,270 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/data/7e9554a47/1946f986730d42abaf667c5ab7e83423 [2023-11-21 22:18:53,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:18:53,281 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:18:53,283 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:53,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:18:53,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:18:53,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47eaf245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53, skipping insertion in model container [2023-11-21 22:18:53,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,318 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:18:53,531 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_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2023-11-21 22:18:53,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:53,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:18:53,577 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_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2023-11-21 22:18:53,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:53,599 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:18:53,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53 WrapperNode [2023-11-21 22:18:53,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:53,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:53,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:18:53,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:18:53,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,626 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,643 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2023-11-21 22:18:53,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:53,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:18:53,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:18:53,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:18:53,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,660 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,669 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:18:53,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,679 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:18:53,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:18:53,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:18:53,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:18:53,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (1/1) ... [2023-11-21 22:18:53,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:53,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:53,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:18:53,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:18:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:18:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:18:53,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:18:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-11-21 22:18:53,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-11-21 22:18:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:18:53,832 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:18:53,834 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:18:53,974 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:18:53,996 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:18:54,001 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:18:54,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:54 BoogieIcfgContainer [2023-11-21 22:18:54,004 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:18:54,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:18:54,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:18:54,013 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:18:54,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:18:53" (1/3) ... [2023-11-21 22:18:54,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1550abbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:54, skipping insertion in model container [2023-11-21 22:18:54,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:53" (2/3) ... [2023-11-21 22:18:54,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1550abbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:54, skipping insertion in model container [2023-11-21 22:18:54,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:54" (3/3) ... [2023-11-21 22:18:54,017 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2023-11-21 22:18:54,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:18:54,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:18:54,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:18:54,098 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;@2e314539, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:18:54,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:18:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:18:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:18:54,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:54,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:54,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:54,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:54,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1538870455, now seen corresponding path program 1 times [2023-11-21 22:18:54,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:54,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824749923] [2023-11-21 22:18:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:54,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:54,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:54,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824749923] [2023-11-21 22:18:54,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824749923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:54,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:54,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899998355] [2023-11-21 22:18:54,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:54,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:54,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:54,665 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-11-21 22:18:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:54,792 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2023-11-21 22:18:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2023-11-21 22:18:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:54,804 INFO L225 Difference]: With dead ends: 46 [2023-11-21 22:18:54,805 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 22:18:54,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:18:54,813 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:54,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 22:18:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-21 22:18:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 22:18:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-21 22:18:54,861 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2023-11-21 22:18:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:54,862 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-21 22:18:54,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-11-21 22:18:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-21 22:18:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 22:18:54,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:54,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:54,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:18:54,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:54,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash -108557995, now seen corresponding path program 1 times [2023-11-21 22:18:54,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:54,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361121759] [2023-11-21 22:18:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:54,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:54,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:55,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:18:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361121759] [2023-11-21 22:18:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361121759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713020103] [2023-11-21 22:18:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:55,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:55,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:55,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:55,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:18:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:55,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:18:55,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:18:55,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:18:55,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713020103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:55,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:55,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-21 22:18:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312871939] [2023-11-21 22:18:55,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:18:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:55,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:18:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:18:55,457 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 22:18:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:55,663 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2023-11-21 22:18:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:18:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2023-11-21 22:18:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:55,668 INFO L225 Difference]: With dead ends: 73 [2023-11-21 22:18:55,668 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 22:18:55,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:18:55,671 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:55,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 22:18:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-21 22:18:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2023-11-21 22:18:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 75 transitions. [2023-11-21 22:18:55,693 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 75 transitions. Word has length 18 [2023-11-21 22:18:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:55,693 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 75 transitions. [2023-11-21 22:18:55,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 22:18:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 75 transitions. [2023-11-21 22:18:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:18:55,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:55,702 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:55,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:55,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:55,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1262121361, now seen corresponding path program 1 times [2023-11-21 22:18:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:55,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455165783] [2023-11-21 22:18:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:55,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:18:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:18:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-21 22:18:56,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455165783] [2023-11-21 22:18:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455165783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:56,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429395034] [2023-11-21 22:18:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:56,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:56,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:56,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:56,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:18:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:56,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:18:56,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-21 22:18:56,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-21 22:18:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429395034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:57,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:57,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-11-21 22:18:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72455227] [2023-11-21 22:18:57,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:57,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:18:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:18:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:18:57,396 INFO L87 Difference]: Start difference. First operand 49 states and 75 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 22:18:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:57,563 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2023-11-21 22:18:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:18:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-11-21 22:18:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:57,567 INFO L225 Difference]: With dead ends: 119 [2023-11-21 22:18:57,567 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 22:18:57,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:18:57,572 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:57,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 67 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 22:18:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-21 22:18:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2023-11-21 22:18:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2023-11-21 22:18:57,589 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 44 [2023-11-21 22:18:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:57,589 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2023-11-21 22:18:57,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 22:18:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2023-11-21 22:18:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 22:18:57,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:57,596 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:57,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:57,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:57,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:57,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:57,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1462639456, now seen corresponding path program 2 times [2023-11-21 22:18:57,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:57,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701042116] [2023-11-21 22:18:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:57,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:18:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:18:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:18:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-21 22:18:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:18:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:18:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 127 proven. 266 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-21 22:18:58,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:58,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701042116] [2023-11-21 22:18:58,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701042116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:58,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456561920] [2023-11-21 22:18:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:58,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:58,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:58,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:18:58,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:18:58,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:58,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 22:18:58,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-21 22:18:59,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-11-21 22:19:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456561920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:01,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2023-11-21 22:19:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117545996] [2023-11-21 22:19:01,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:01,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 22:19:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 22:19:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:19:01,343 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) [2023-11-21 22:19:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:02,352 INFO L93 Difference]: Finished difference Result 125 states and 252 transitions. [2023-11-21 22:19:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-21 22:19:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) Word has length 118 [2023-11-21 22:19:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:02,357 INFO L225 Difference]: With dead ends: 125 [2023-11-21 22:19:02,358 INFO L226 Difference]: Without dead ends: 77 [2023-11-21 22:19:02,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=587, Invalid=2835, Unknown=0, NotChecked=0, Total=3422 [2023-11-21 22:19:02,362 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:02,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 141 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:19:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-21 22:19:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-11-21 22:19:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2023-11-21 22:19:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2023-11-21 22:19:02,381 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 118 [2023-11-21 22:19:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:02,382 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2023-11-21 22:19:02,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) [2023-11-21 22:19:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2023-11-21 22:19:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-21 22:19:02,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:02,389 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:02,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:02,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:02,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:02,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:02,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1363865912, now seen corresponding path program 3 times [2023-11-21 22:19:02,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:02,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351639171] [2023-11-21 22:19:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:02,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:19:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-21 22:19:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 125 proven. 275 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-21 22:19:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351639171] [2023-11-21 22:19:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351639171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776759812] [2023-11-21 22:19:03,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:19:03,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:03,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:03,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:19:03,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-21 22:19:03,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:03,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:19:03,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 484 proven. 71 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-21 22:19:03,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 131 proven. 269 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-21 22:19:05,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776759812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:05,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:05,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 27 [2023-11-21 22:19:05,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804671236] [2023-11-21 22:19:05,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:05,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:19:05,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:19:05,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:19:05,830 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 22 states have internal predecessors, (69), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-21 22:19:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:06,501 INFO L93 Difference]: Finished difference Result 170 states and 308 transitions. [2023-11-21 22:19:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-21 22:19:06,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 22 states have internal predecessors, (69), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) Word has length 130 [2023-11-21 22:19:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:06,506 INFO L225 Difference]: With dead ends: 170 [2023-11-21 22:19:06,507 INFO L226 Difference]: Without dead ends: 93 [2023-11-21 22:19:06,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 281 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=565, Invalid=1985, Unknown=0, NotChecked=0, Total=2550 [2023-11-21 22:19:06,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:06,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 171 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:19:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-21 22:19:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2023-11-21 22:19:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2023-11-21 22:19:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 126 transitions. [2023-11-21 22:19:06,529 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 126 transitions. Word has length 130 [2023-11-21 22:19:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:06,530 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 126 transitions. [2023-11-21 22:19:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 22 states have internal predecessors, (69), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-21 22:19:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 126 transitions. [2023-11-21 22:19:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-21 22:19:06,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:06,533 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:06,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:06,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:06,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:06,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:06,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1090473022, now seen corresponding path program 4 times [2023-11-21 22:19:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:06,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061699645] [2023-11-21 22:19:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:06,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:19:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-21 22:19:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 152 proven. 295 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-21 22:19:07,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061699645] [2023-11-21 22:19:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061699645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781053483] [2023-11-21 22:19:07,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:19:07,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:07,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:07,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:07,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:19:07,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:19:07,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:07,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:19:07,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-21 22:19:07,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-21 22:19:10,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781053483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:10,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:10,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-11-21 22:19:10,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869416169] [2023-11-21 22:19:10,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:10,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 22:19:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 22:19:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:19:10,080 INFO L87 Difference]: Start difference. First operand 84 states and 126 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-21 22:19:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:10,726 INFO L93 Difference]: Finished difference Result 193 states and 340 transitions. [2023-11-21 22:19:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-21 22:19:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 130 [2023-11-21 22:19:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:10,730 INFO L225 Difference]: With dead ends: 193 [2023-11-21 22:19:10,730 INFO L226 Difference]: Without dead ends: 108 [2023-11-21 22:19:10,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 280 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2023-11-21 22:19:10,734 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:10,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 174 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:19:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-21 22:19:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2023-11-21 22:19:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2023-11-21 22:19:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 151 transitions. [2023-11-21 22:19:10,754 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 151 transitions. Word has length 130 [2023-11-21 22:19:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:10,755 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 151 transitions. [2023-11-21 22:19:10,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-21 22:19:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 151 transitions. [2023-11-21 22:19:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-21 22:19:10,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:10,758 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:10,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:10,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:19:10,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:10,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -511219076, now seen corresponding path program 5 times [2023-11-21 22:19:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:10,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889810812] [2023-11-21 22:19:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:10,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:11,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:19:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-21 22:19:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-11-21 22:19:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889810812] [2023-11-21 22:19:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889810812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146614282] [2023-11-21 22:19:12,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:19:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:12,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:12,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:19:12,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-21 22:19:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:12,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:19:12,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2023-11-21 22:19:12,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-11-21 22:19:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146614282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:18,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:18,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2023-11-21 22:19:18,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333024999] [2023-11-21 22:19:18,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:18,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-21 22:19:18,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-21 22:19:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-11-21 22:19:18,462 INFO L87 Difference]: Start difference. First operand 99 states and 151 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-11-21 22:19:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:19,384 INFO L93 Difference]: Finished difference Result 223 states and 398 transitions. [2023-11-21 22:19:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-21 22:19:19,390 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 156 [2023-11-21 22:19:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:19,395 INFO L225 Difference]: With dead ends: 223 [2023-11-21 22:19:19,396 INFO L226 Difference]: Without dead ends: 132 [2023-11-21 22:19:19,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 331 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=945, Invalid=4025, Unknown=0, NotChecked=0, Total=4970 [2023-11-21 22:19:19,400 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:19,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 227 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:19:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-21 22:19:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2023-11-21 22:19:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 76 states have internal predecessors, (83), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2023-11-21 22:19:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 184 transitions. [2023-11-21 22:19:19,425 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 184 transitions. Word has length 156 [2023-11-21 22:19:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:19,425 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 184 transitions. [2023-11-21 22:19:19,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-11-21 22:19:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 184 transitions. [2023-11-21 22:19:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-21 22:19:19,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:19,429 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:19,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:19,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:19:19,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:19,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2140695240, now seen corresponding path program 6 times [2023-11-21 22:19:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:19,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038065598] [2023-11-21 22:19:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:19,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:19:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-21 22:19:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-21 22:19:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-21 22:19:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-21 22:19:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038065598] [2023-11-21 22:19:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038065598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163177918] [2023-11-21 22:19:21,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:19:21,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:21,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:21,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:21,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:19:22,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-11-21 22:19:22,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:22,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-21 22:19:22,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2023-11-21 22:19:22,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2023-11-21 22:19:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163177918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:23,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:23,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 36 [2023-11-21 22:19:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266610331] [2023-11-21 22:19:23,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:23,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-21 22:19:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-21 22:19:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2023-11-21 22:19:23,710 INFO L87 Difference]: Start difference. First operand 114 states and 184 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 29 states have internal predecessors, (55), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-21 22:19:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:27,278 INFO L93 Difference]: Finished difference Result 314 states and 625 transitions. [2023-11-21 22:19:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-21 22:19:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 29 states have internal predecessors, (55), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 182 [2023-11-21 22:19:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:27,297 INFO L225 Difference]: With dead ends: 314 [2023-11-21 22:19:27,297 INFO L226 Difference]: Without dead ends: 284 [2023-11-21 22:19:27,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1015, Invalid=7357, Unknown=0, NotChecked=0, Total=8372 [2023-11-21 22:19:27,305 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 146 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:27,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 482 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2745 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-21 22:19:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-21 22:19:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 186. [2023-11-21 22:19:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 122 states have internal predecessors, (131), 31 states have call successors, (31), 11 states have call predecessors, (31), 33 states have return successors, (230), 52 states have call predecessors, (230), 31 states have call successors, (230) [2023-11-21 22:19:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 392 transitions. [2023-11-21 22:19:27,396 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 392 transitions. Word has length 182 [2023-11-21 22:19:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:27,398 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 392 transitions. [2023-11-21 22:19:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 29 states have internal predecessors, (55), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-21 22:19:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 392 transitions. [2023-11-21 22:19:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-21 22:19:27,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:27,422 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:27,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:27,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:27,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:27,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1922447937, now seen corresponding path program 7 times [2023-11-21 22:19:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863044509] [2023-11-21 22:19:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:19:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-21 22:19:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-21 22:19:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-11-21 22:19:29,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:29,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863044509] [2023-11-21 22:19:29,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863044509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:29,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767002546] [2023-11-21 22:19:29,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:19:29,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:29,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:29,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:19:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-21 22:19:29,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2023-11-21 22:19:29,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-11-21 22:19:35,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767002546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:35,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:35,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2023-11-21 22:19:35,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731871830] [2023-11-21 22:19:35,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-21 22:19:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-21 22:19:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 22:19:35,011 INFO L87 Difference]: Start difference. First operand 186 states and 392 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 31 states have internal predecessors, (84), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-11-21 22:19:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:36,005 INFO L93 Difference]: Finished difference Result 381 states and 896 transitions. [2023-11-21 22:19:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-21 22:19:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 31 states have internal predecessors, (84), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 169 [2023-11-21 22:19:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:36,010 INFO L225 Difference]: With dead ends: 381 [2023-11-21 22:19:36,011 INFO L226 Difference]: Without dead ends: 203 [2023-11-21 22:19:36,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 360 SyntacticMatches, 19 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1065, Invalid=4191, Unknown=0, NotChecked=0, Total=5256 [2023-11-21 22:19:36,018 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:36,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 223 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:19:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-21 22:19:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 167. [2023-11-21 22:19:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 110 states have internal predecessors, (118), 27 states have call successors, (27), 10 states have call predecessors, (27), 30 states have return successors, (162), 46 states have call predecessors, (162), 27 states have call successors, (162) [2023-11-21 22:19:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 307 transitions. [2023-11-21 22:19:36,054 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 307 transitions. Word has length 169 [2023-11-21 22:19:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:36,055 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 307 transitions. [2023-11-21 22:19:36,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 31 states have internal predecessors, (84), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-11-21 22:19:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 307 transitions. [2023-11-21 22:19:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-21 22:19:36,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:36,059 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:36,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:36,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:36,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:36,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1482736643, now seen corresponding path program 8 times [2023-11-21 22:19:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:36,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106970791] [2023-11-21 22:19:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:19:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-21 22:19:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-21 22:19:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-21 22:19:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-21 22:19:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 664 proven. 533 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-11-21 22:19:38,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:38,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106970791] [2023-11-21 22:19:38,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106970791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:38,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963583489] [2023-11-21 22:19:38,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:19:38,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:38,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:38,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:38,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0c53f9-802e-4ef5-a8aa-5ea60a19b01b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process