./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB --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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:11:48,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:11:48,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:11:48,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:11:48,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:11:48,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:11:48,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:11:48,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:11:48,280 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:11:48,280 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:11:48,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:11:48,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:11:48,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:11:48,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:11:48,281 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:11:48,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:11:48,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:11:48,282 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:11:48,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:11:48,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:11:48,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:11:48,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:11:48,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:11:48,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:11:48,285 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:11:48,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:11:48,285 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:11:48,285 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:11:48,286 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:11:48,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:11:48,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:11:48,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:11:48,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:11:48,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:11:48,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:11:48,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:11:48,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:11:48,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:11:48,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:11:48,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:11:48,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:11:48,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:11:48,289 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB 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 -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2024-11-28 05:11:48,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:11:48,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:11:48,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:11:48,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:11:48,623 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:11:48,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/loops/n.c24.i [2024-11-28 05:11:51,760 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/data/e4be171c2/443db517d72946748eb5d259a6bc1579/FLAG724839a63 [2024-11-28 05:11:52,125 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:11:52,125 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/sv-benchmarks/c/loops/n.c24.i [2024-11-28 05:11:52,136 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/data/e4be171c2/443db517d72946748eb5d259a6bc1579/FLAG724839a63 [2024-11-28 05:11:52,151 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/data/e4be171c2/443db517d72946748eb5d259a6bc1579 [2024-11-28 05:11:52,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:11:52,155 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:11:52,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:11:52,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:11:52,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:11:52,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9aac8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52, skipping insertion in model container [2024-11-28 05:11:52,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,184 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:11:52,353 WARN L250 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_c6d069fa-64ea-41cd-a077-e2edab069291/sv-benchmarks/c/loops/n.c24.i[805,818] [2024-11-28 05:11:52,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:11:52,460 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:11:52,474 WARN L250 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_c6d069fa-64ea-41cd-a077-e2edab069291/sv-benchmarks/c/loops/n.c24.i[805,818] [2024-11-28 05:11:52,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:11:52,537 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:11:52,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52 WrapperNode [2024-11-28 05:11:52,538 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:11:52,539 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:11:52,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:11:52,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:11:52,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,557 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,587 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 157 [2024-11-28 05:11:52,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:11:52,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:11:52,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:11:52,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:11:52,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,621 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 9, 2]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 5, 1]. [2024-11-28 05:11:52,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,629 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:11:52,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:11:52,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:11:52,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:11:52,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (1/1) ... [2024-11-28 05:11:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:11:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:52,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:11:52,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:11:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2024-11-28 05:11:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2024-11-28 05:11:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:11:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:11:52,806 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:11:52,808 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:11:53,118 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-28 05:11:53,118 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:11:53,128 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:11:53,128 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:11:53,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:53 BoogieIcfgContainer [2024-11-28 05:11:53,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:11:53,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:11:53,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:11:53,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:11:53,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:11:52" (1/3) ... [2024-11-28 05:11:53,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78087db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:11:53, skipping insertion in model container [2024-11-28 05:11:53,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:52" (2/3) ... [2024-11-28 05:11:53,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78087db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:11:53, skipping insertion in model container [2024-11-28 05:11:53,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:53" (3/3) ... [2024-11-28 05:11:53,141 INFO L128 eAbstractionObserver]: Analyzing ICFG n.c24.i [2024-11-28 05:11:53,158 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:11:53,160 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG n.c24.i that has 1 procedures, 37 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-28 05:11:53,233 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:11:53,254 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@608be6f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:11:53,254 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:11:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:11:53,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:53,268 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:53,268 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:53,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 272286125, now seen corresponding path program 1 times [2024-11-28 05:11:53,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214859064] [2024-11-28 05:11:53,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:53,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:53,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:53,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214859064] [2024-11-28 05:11:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214859064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:11:53,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:11:53,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:11:53,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788907135] [2024-11-28 05:11:53,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:53,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:11:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:53,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:11:53,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:11:53,608 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:53,693 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2024-11-28 05:11:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:11:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 05:11:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:53,705 INFO L225 Difference]: With dead ends: 97 [2024-11-28 05:11:53,706 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 05:11:53,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:11:53,715 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:53,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 79 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:11:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 05:11:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2024-11-28 05:11:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-28 05:11:53,758 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 8 [2024-11-28 05:11:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:53,759 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-28 05:11:53,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-28 05:11:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 05:11:53,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:53,760 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:53,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:11:53,760 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:53,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1076455970, now seen corresponding path program 1 times [2024-11-28 05:11:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:53,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881193757] [2024-11-28 05:11:53,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:53,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:11:53,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:53,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881193757] [2024-11-28 05:11:53,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881193757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552616972] [2024-11-28 05:11:53,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:53,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:53,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:53,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:11:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:54,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:11:54,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:11:54,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:11:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552616972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:54,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:54,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 05:11:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762472879] [2024-11-28 05:11:54,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:54,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:11:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:54,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:11:54,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:11:54,158 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:54,307 INFO L93 Difference]: Finished difference Result 143 states and 195 transitions. [2024-11-28 05:11:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:11:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 05:11:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:54,309 INFO L225 Difference]: With dead ends: 143 [2024-11-28 05:11:54,309 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 05:11:54,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:11:54,310 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 194 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:54,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 151 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:11:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 05:11:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-28 05:11:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3392857142857142) internal successors, (150), 112 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2024-11-28 05:11:54,331 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 16 [2024-11-28 05:11:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:54,332 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2024-11-28 05:11:54,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2024-11-28 05:11:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 05:11:54,335 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:54,335 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:54,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:11:54,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-28 05:11:54,536 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:54,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1571198532, now seen corresponding path program 2 times [2024-11-28 05:11:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:54,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092989541] [2024-11-28 05:11:54,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:54,627 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:54,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 05:11:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092989541] [2024-11-28 05:11:54,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092989541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:11:54,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:11:54,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:11:54,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844692484] [2024-11-28 05:11:54,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:54,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:11:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:54,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:11:54,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:11:54,935 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:54,982 INFO L93 Difference]: Finished difference Result 210 states and 283 transitions. [2024-11-28 05:11:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:11:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-28 05:11:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:54,984 INFO L225 Difference]: With dead ends: 210 [2024-11-28 05:11:54,984 INFO L226 Difference]: Without dead ends: 206 [2024-11-28 05:11:54,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:11:54,985 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:54,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 122 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:11:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-28 05:11:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 114. [2024-11-28 05:11:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.345132743362832) internal successors, (152), 113 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 152 transitions. [2024-11-28 05:11:55,015 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 152 transitions. Word has length 40 [2024-11-28 05:11:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:55,015 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 152 transitions. [2024-11-28 05:11:55,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 152 transitions. [2024-11-28 05:11:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 05:11:55,017 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:55,017 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:55,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:11:55,017 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:55,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 821812742, now seen corresponding path program 1 times [2024-11-28 05:11:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19830543] [2024-11-28 05:11:55,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:55,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 05:11:55,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19830543] [2024-11-28 05:11:55,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19830543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875941719] [2024-11-28 05:11:55,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:55,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:55,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:11:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:55,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:11:55,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 05:11:55,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 05:11:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875941719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:55,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:55,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-28 05:11:55,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284446100] [2024-11-28 05:11:55,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:55,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:11:55,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:55,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:11:55,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:11:55,665 INFO L87 Difference]: Start difference. First operand 114 states and 152 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:55,938 INFO L93 Difference]: Finished difference Result 393 states and 540 transitions. [2024-11-28 05:11:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:11:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-28 05:11:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:55,940 INFO L225 Difference]: With dead ends: 393 [2024-11-28 05:11:55,944 INFO L226 Difference]: Without dead ends: 290 [2024-11-28 05:11:55,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:11:55,946 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 706 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:55,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 286 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:11:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-28 05:11:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 270. [2024-11-28 05:11:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.345724907063197) internal successors, (362), 269 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 362 transitions. [2024-11-28 05:11:55,997 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 362 transitions. Word has length 46 [2024-11-28 05:11:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:55,997 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 362 transitions. [2024-11-28 05:11:55,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 362 transitions. [2024-11-28 05:11:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 05:11:56,004 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:56,004 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:56,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:11:56,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:56,205 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:56,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1292057034, now seen corresponding path program 2 times [2024-11-28 05:11:56,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:56,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916095783] [2024-11-28 05:11:56,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:56,315 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:56,315 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-11-28 05:11:56,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:56,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916095783] [2024-11-28 05:11:56,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916095783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143381827] [2024-11-28 05:11:56,836 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:56,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:56,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:56,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:11:57,022 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:57,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:57,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:11:57,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-11-28 05:11:57,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-11-28 05:11:57,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143381827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:57,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:57,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-28 05:11:57,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804690529] [2024-11-28 05:11:57,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:57,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 05:11:57,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:57,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 05:11:57,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:11:57,511 INFO L87 Difference]: Start difference. First operand 270 states and 362 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:58,151 INFO L93 Difference]: Finished difference Result 867 states and 1194 transitions. [2024-11-28 05:11:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:11:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-28 05:11:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:58,155 INFO L225 Difference]: With dead ends: 867 [2024-11-28 05:11:58,155 INFO L226 Difference]: Without dead ends: 620 [2024-11-28 05:11:58,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:11:58,157 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 2114 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:58,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2114 Valid, 614 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:11:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2024-11-28 05:11:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 582. [2024-11-28 05:11:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.3459552495697074) internal successors, (782), 581 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 782 transitions. [2024-11-28 05:11:58,198 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 782 transitions. Word has length 94 [2024-11-28 05:11:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:58,198 INFO L471 AbstractCegarLoop]: Abstraction has 582 states and 782 transitions. [2024-11-28 05:11:58,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 782 transitions. [2024-11-28 05:11:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-28 05:11:58,202 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:58,203 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:58,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:11:58,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:58,403 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:58,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1144616110, now seen corresponding path program 3 times [2024-11-28 05:11:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946057161] [2024-11-28 05:11:58,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:11:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:58,459 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:11:58,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2024-11-28 05:11:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946057161] [2024-11-28 05:11:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946057161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075366442] [2024-11-28 05:11:58,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:11:58,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:58,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:58,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:11:58,771 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:11:58,771 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:58,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:11:58,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2024-11-28 05:11:58,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2024-11-28 05:11:59,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075366442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:59,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2024-11-28 05:11:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217138020] [2024-11-28 05:11:59,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:59,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:11:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:59,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:11:59,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:11:59,159 INFO L87 Difference]: Start difference. First operand 582 states and 782 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:59,402 INFO L93 Difference]: Finished difference Result 2181 states and 2997 transitions. [2024-11-28 05:11:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:11:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2024-11-28 05:11:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:59,421 INFO L225 Difference]: With dead ends: 2181 [2024-11-28 05:11:59,421 INFO L226 Difference]: Without dead ends: 2176 [2024-11-28 05:11:59,422 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:11:59,423 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 231 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:59,424 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 397 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:11:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2024-11-28 05:11:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 639. [2024-11-28 05:11:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 1.3573667711598747) internal successors, (866), 638 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 866 transitions. [2024-11-28 05:11:59,539 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 866 transitions. Word has length 190 [2024-11-28 05:11:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:59,540 INFO L471 AbstractCegarLoop]: Abstraction has 639 states and 866 transitions. [2024-11-28 05:11:59,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 866 transitions. [2024-11-28 05:11:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-28 05:11:59,547 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:59,548 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:59,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:11:59,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:59,748 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:59,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash -156987752, now seen corresponding path program 4 times [2024-11-28 05:11:59,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:59,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324964405] [2024-11-28 05:11:59,749 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:11:59,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:59,847 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:11:59,848 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1492 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2024-11-28 05:12:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324964405] [2024-11-28 05:12:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324964405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116782742] [2024-11-28 05:12:01,421 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:01,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:01,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:01,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:12:01,676 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:12:01,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:01,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 05:12:01,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1492 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2024-11-28 05:12:01,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1492 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2024-11-28 05:12:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116782742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:03,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-11-28 05:12:03,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616786803] [2024-11-28 05:12:03,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:03,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 05:12:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:03,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 05:12:03,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:12:03,333 INFO L87 Difference]: Start difference. First operand 639 states and 866 transitions. Second operand has 48 states, 48 states have (on average 6.0) internal successors, (288), 48 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:05,326 INFO L93 Difference]: Finished difference Result 3297 states and 4686 transitions. [2024-11-28 05:12:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 05:12:05,327 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.0) internal successors, (288), 48 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2024-11-28 05:12:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:05,338 INFO L225 Difference]: With dead ends: 3297 [2024-11-28 05:12:05,339 INFO L226 Difference]: Without dead ends: 2705 [2024-11-28 05:12:05,341 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:12:05,342 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 4642 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4642 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:05,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4642 Valid, 1262 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:12:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2024-11-28 05:12:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1263. [2024-11-28 05:12:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 1.3518225039619651) internal successors, (1706), 1262 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1706 transitions. [2024-11-28 05:12:05,477 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1706 transitions. Word has length 208 [2024-11-28 05:12:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:05,478 INFO L471 AbstractCegarLoop]: Abstraction has 1263 states and 1706 transitions. [2024-11-28 05:12:05,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.0) internal successors, (288), 48 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1706 transitions. [2024-11-28 05:12:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2024-11-28 05:12:05,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:05,491 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:05,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:05,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:05,692 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:05,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1125316008, now seen corresponding path program 5 times [2024-11-28 05:12:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953868784] [2024-11-28 05:12:05,694 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:06,587 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-28 05:12:06,587 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8592 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 6476 trivial. 0 not checked. [2024-11-28 05:12:10,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953868784] [2024-11-28 05:12:10,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953868784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032218444] [2024-11-28 05:12:10,904 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:10,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:10,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:10,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:13:24,861 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-28 05:13:24,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:24,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 05:13:24,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8592 backedges. 0 proven. 6436 refuted. 0 times theorem prover too weak. 2156 trivial. 0 not checked. [2024-11-28 05:13:25,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8592 backedges. 0 proven. 6436 refuted. 0 times theorem prover too weak. 2156 trivial. 0 not checked. [2024-11-28 05:13:28,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032218444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:28,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:28,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-11-28 05:13:28,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528785363] [2024-11-28 05:13:28,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:28,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-28 05:13:28,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:28,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-28 05:13:28,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 05:13:28,734 INFO L87 Difference]: Start difference. First operand 1263 states and 1706 transitions. Second operand has 96 states, 96 states have (on average 7.125) internal successors, (684), 96 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:36,405 INFO L93 Difference]: Finished difference Result 6561 states and 9318 transitions. [2024-11-28 05:13:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-28 05:13:36,405 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 7.125) internal successors, (684), 96 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 400 [2024-11-28 05:13:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:36,425 INFO L225 Difference]: With dead ends: 6561 [2024-11-28 05:13:36,426 INFO L226 Difference]: Without dead ends: 5393 [2024-11-28 05:13:36,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 05:13:36,430 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 9008 mSDsluCounter, 2539 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9008 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:36,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9008 Valid, 2574 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:13:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2024-11-28 05:13:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 2511. [2024-11-28 05:13:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2510 states have (on average 1.349003984063745) internal successors, (3386), 2510 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3386 transitions. [2024-11-28 05:13:36,603 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3386 transitions. Word has length 400 [2024-11-28 05:13:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:36,603 INFO L471 AbstractCegarLoop]: Abstraction has 2511 states and 3386 transitions. [2024-11-28 05:13:36,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 7.125) internal successors, (684), 96 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3386 transitions. [2024-11-28 05:13:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2024-11-28 05:13:36,627 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:36,627 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:36,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:36,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:36,828 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:36,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -907975736, now seen corresponding path program 6 times [2024-11-28 05:13:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090966565] [2024-11-28 05:13:36,829 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:13:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:36,998 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 05:13:36,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35568 backedges. 652 proven. 40 refuted. 0 times theorem prover too weak. 34876 trivial. 0 not checked. [2024-11-28 05:13:37,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:37,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090966565] [2024-11-28 05:13:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090966565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976871529] [2024-11-28 05:13:37,288 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:13:37,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:37,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:37,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:13:37,778 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 05:13:37,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:37,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:13:37,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 35568 backedges. 652 proven. 40 refuted. 0 times theorem prover too weak. 34876 trivial. 0 not checked. [2024-11-28 05:13:38,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35568 backedges. 652 proven. 40 refuted. 0 times theorem prover too weak. 34876 trivial. 0 not checked. [2024-11-28 05:13:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976871529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:38,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:38,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2024-11-28 05:13:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231104689] [2024-11-28 05:13:38,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:38,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:13:38,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:38,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:13:38,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:13:38,443 INFO L87 Difference]: Start difference. First operand 2511 states and 3386 transitions. Second operand has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:39,724 INFO L93 Difference]: Finished difference Result 21420 states and 29976 transitions. [2024-11-28 05:13:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:13:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 784 [2024-11-28 05:13:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:39,785 INFO L225 Difference]: With dead ends: 21420 [2024-11-28 05:13:39,785 INFO L226 Difference]: Without dead ends: 21415 [2024-11-28 05:13:39,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1581 GetRequests, 1556 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:13:39,791 INFO L435 NwaCegarLoop]: 163 mSDtfsCounter, 646 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:39,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1535 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:13:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21415 states. [2024-11-28 05:13:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21415 to 2625. [2024-11-28 05:13:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2624 states have (on average 1.3544207317073171) internal successors, (3554), 2624 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3554 transitions. [2024-11-28 05:13:40,319 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3554 transitions. Word has length 784 [2024-11-28 05:13:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:40,321 INFO L471 AbstractCegarLoop]: Abstraction has 2625 states and 3554 transitions. [2024-11-28 05:13:40,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3554 transitions. [2024-11-28 05:13:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2024-11-28 05:13:40,350 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:40,350 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:40,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:40,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:40,554 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:40,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash -458694188, now seen corresponding path program 7 times [2024-11-28 05:13:40,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:40,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618697067] [2024-11-28 05:13:40,555 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:13:40,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36366 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 27530 trivial. 0 not checked. [2024-11-28 05:13:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618697067] [2024-11-28 05:13:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618697067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085447905] [2024-11-28 05:13:52,282 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:13:52,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:52,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:52,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:52,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:13:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:52,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 2406 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 05:13:52,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36366 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 27530 trivial. 0 not checked. [2024-11-28 05:13:53,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36366 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 27530 trivial. 0 not checked. [2024-11-28 05:14:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085447905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:04,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:04,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-28 05:14:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422922023] [2024-11-28 05:14:04,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:04,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-28 05:14:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:04,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-28 05:14:04,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-28 05:14:04,855 INFO L87 Difference]: Start difference. First operand 2625 states and 3554 transitions. Second operand has 193 states, 193 states have (on average 2.077720207253886) internal successors, (401), 193 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:15:46,194 INFO L93 Difference]: Finished difference Result 24261 states and 35046 transitions. [2024-11-28 05:15:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-28 05:15:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.077720207253886) internal successors, (401), 193 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 820 [2024-11-28 05:15:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:15:46,250 INFO L225 Difference]: With dead ends: 24261 [2024-11-28 05:15:46,250 INFO L226 Difference]: Without dead ends: 21827 [2024-11-28 05:15:46,266 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1735 GetRequests, 1544 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-28 05:15:46,268 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 33314 mSDsluCounter, 5111 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 1140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33314 SdHoareTripleChecker+Valid, 5146 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1140 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:15:46,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33314 Valid, 5146 Invalid, 2666 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1140 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 05:15:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21827 states. [2024-11-28 05:15:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21827 to 5121. [2024-11-28 05:15:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 5120 states have (on average 1.350390625) internal successors, (6914), 5120 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 6914 transitions. [2024-11-28 05:15:47,031 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 6914 transitions. Word has length 820 [2024-11-28 05:15:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:15:47,032 INFO L471 AbstractCegarLoop]: Abstraction has 5121 states and 6914 transitions. [2024-11-28 05:15:47,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.077720207253886) internal successors, (401), 193 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 6914 transitions. [2024-11-28 05:15:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1589 [2024-11-28 05:15:47,062 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:15:47,062 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 190, 190, 190, 190, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:47,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:15:47,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:47,263 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:15:47,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash 763567636, now seen corresponding path program 8 times [2024-11-28 05:15:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:47,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861414953] [2024-11-28 05:15:47,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:48,052 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:48,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 146190 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 110090 trivial. 0 not checked. [2024-11-28 05:16:34,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:34,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861414953] [2024-11-28 05:16:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861414953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:34,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601010649] [2024-11-28 05:16:34,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:16:34,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:34,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:34,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:34,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d069fa-64ea-41cd-a077-e2edab069291/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:16:35,600 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:16:35,600 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:35,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 4518 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-28 05:16:35,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:16:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 146190 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 110090 trivial. 0 not checked. [2024-11-28 05:16:36,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:17:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 146190 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 110090 trivial. 0 not checked. [2024-11-28 05:17:22,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601010649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:17:22,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:17:22,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-11-28 05:17:22,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977624824] [2024-11-28 05:17:22,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:17:22,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-28 05:17:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:17:22,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-28 05:17:22,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-11-28 05:17:22,391 INFO L87 Difference]: Start difference. First operand 5121 states and 6914 transitions. Second operand has 385 states, 385 states have (on average 2.038961038961039) internal successors, (785), 385 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)