./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --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_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/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_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/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_69a041b7-b028-4f29-a24c-42fc18f3de2b/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 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:12:16,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:12:16,284 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:12:16,298 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:12:16,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:12:16,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:12:16,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:12:16,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:12:16,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:12:16,334 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:12:16,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:12:16,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:12:16,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:12:16,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:12:16,335 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:12:16,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:12:16,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:12:16,337 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:12:16,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:12:16,337 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:12:16,337 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:12:16,337 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:12:16,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:12:16,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:12:16,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:12:16,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:12:16,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:12:16,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:12:16,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:12:16,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:12:16,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:12:16,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:12:16,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:12:16,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:12:16,340 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_69a041b7-b028-4f29-a24c-42fc18f3de2b/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 -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 [2024-11-28 05:12:16,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:12:16,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:12:16,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:12:16,707 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:12:16,707 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:12:16,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-11-28 05:12:19,701 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/data/58202bc70/87f27099d92949b690f634d8ac957464/FLAGd28cb0004 [2024-11-28 05:12:19,989 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:12:19,990 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-11-28 05:12:20,011 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/data/58202bc70/87f27099d92949b690f634d8ac957464/FLAGd28cb0004 [2024-11-28 05:12:20,054 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/data/58202bc70/87f27099d92949b690f634d8ac957464 [2024-11-28 05:12:20,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:12:20,063 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:12:20,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:12:20,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:12:20,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:12:20,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508bc1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20, skipping insertion in model container [2024-11-28 05:12:20,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,098 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:12:20,277 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_69a041b7-b028-4f29-a24c-42fc18f3de2b/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-11-28 05:12:20,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:12:20,317 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:12:20,328 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_69a041b7-b028-4f29-a24c-42fc18f3de2b/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-11-28 05:12:20,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:12:20,366 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:12:20,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20 WrapperNode [2024-11-28 05:12:20,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:12:20,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:12:20,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:12:20,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:12:20,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,389 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,411 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-11-28 05:12:20,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:12:20,412 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:12:20,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:12:20,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:12:20,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,426 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,447 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 4, 3, 5, 27]. 66 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 1, 2, 2]. [2024-11-28 05:12:20,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,455 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,463 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:12:20,464 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:12:20,464 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:12:20,464 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:12:20,466 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (1/1) ... [2024-11-28 05:12:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:12:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:20,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:12:20,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:12:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:12:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:12:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:12:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 05:12:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 05:12:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-28 05:12:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 05:12:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:12:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:12:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-28 05:12:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-11-28 05:12:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-11-28 05:12:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:12:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:12:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:12:20,648 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:12:20,651 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:12:20,884 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-28 05:12:20,886 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:12:20,897 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:12:20,897 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-28 05:12:20,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:12:20 BoogieIcfgContainer [2024-11-28 05:12:20,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:12:20,900 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:12:20,900 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:12:20,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:12:20,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:12:20" (1/3) ... [2024-11-28 05:12:20,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d48ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:12:20, skipping insertion in model container [2024-11-28 05:12:20,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:20" (2/3) ... [2024-11-28 05:12:20,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d48ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:12:20, skipping insertion in model container [2024-11-28 05:12:20,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:12:20" (3/3) ... [2024-11-28 05:12:20,910 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2024-11-28 05:12:20,930 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:12:20,933 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_ps4-ll.c that has 3 procedures, 25 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 05:12:21,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:12:21,022 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;@7c0faa7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:12:21,023 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:12:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:12:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 05:12:21,036 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:21,037 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:21,037 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:21,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1281718281, now seen corresponding path program 1 times [2024-11-28 05:12:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:21,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067207291] [2024-11-28 05:12:21,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:12:21,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233000513] [2024-11-28 05:12:21,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:21,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:21,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:21,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:21,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:12:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:21,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 05:12:21,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:21,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:21,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:21,874 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 05:12:21,874 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:21,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:21,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067207291] [2024-11-28 05:12:21,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233000513] [2024-11-28 05:12:21,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233000513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:21,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:21,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:12:21,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873126506] [2024-11-28 05:12:21,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:21,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:21,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:21,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:12:21,919 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:22,241 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2024-11-28 05:12:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-28 05:12:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:22,249 INFO L225 Difference]: With dead ends: 61 [2024-11-28 05:12:22,249 INFO L226 Difference]: Without dead ends: 35 [2024-11-28 05:12:22,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:12:22,256 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:22,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:12:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-28 05:12:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-28 05:12:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:12:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-28 05:12:22,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 9 [2024-11-28 05:12:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:22,303 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-28 05:12:22,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-28 05:12:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:12:22,306 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:22,307 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:22,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:22,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 05:12:22,512 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:22,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1297908024, now seen corresponding path program 1 times [2024-11-28 05:12:22,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:22,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591915671] [2024-11-28 05:12:22,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:22,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:12:22,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123600933] [2024-11-28 05:12:22,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:22,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:22,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:22,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:12:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:22,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-28 05:12:22,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:22,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:22,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:23,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:23,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:23,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:23,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:23,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591915671] [2024-11-28 05:12:23,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:23,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123600933] [2024-11-28 05:12:23,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123600933] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:23,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:23,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-28 05:12:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137228246] [2024-11-28 05:12:23,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:23,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:12:23,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:23,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:12:23,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:12:23,595 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:24,336 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-28 05:12:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:12:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-28 05:12:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:24,340 INFO L225 Difference]: With dead ends: 62 [2024-11-28 05:12:24,340 INFO L226 Difference]: Without dead ends: 60 [2024-11-28 05:12:24,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:12:24,345 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:24,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 133 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:12:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-28 05:12:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2024-11-28 05:12:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-28 05:12:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-28 05:12:24,383 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 19 [2024-11-28 05:12:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:24,383 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-28 05:12:24,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-28 05:12:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:12:24,384 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:24,384 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:24,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:24,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:24,585 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:24,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1446753683, now seen corresponding path program 1 times [2024-11-28 05:12:24,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:24,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083086473] [2024-11-28 05:12:24,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:24,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:12:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236788126] [2024-11-28 05:12:24,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:24,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:24,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:24,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:24,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:12:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:24,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:12:24,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:24,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:24,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:12:24,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 05:12:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:24,862 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083086473] [2024-11-28 05:12:24,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236788126] [2024-11-28 05:12:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236788126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:24,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:24,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:12:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532717435] [2024-11-28 05:12:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:24,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:12:24,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:24,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:12:24,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:12:24,864 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:25,040 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-28 05:12:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:12:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-28 05:12:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:25,043 INFO L225 Difference]: With dead ends: 59 [2024-11-28 05:12:25,043 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 05:12:25,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:12:25,044 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:25,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 53 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:12:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 05:12:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-28 05:12:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 05:12:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-11-28 05:12:25,076 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2024-11-28 05:12:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:25,077 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-11-28 05:12:25,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-11-28 05:12:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 05:12:25,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:25,079 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:25,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:25,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:25,284 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:25,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:25,284 INFO L85 PathProgramCache]: Analyzing trace with hash -61357277, now seen corresponding path program 1 times [2024-11-28 05:12:25,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:25,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482561615] [2024-11-28 05:12:25,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:25,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:12:25,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478923702] [2024-11-28 05:12:25,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:25,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:25,362 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:25,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:12:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:25,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:12:25,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:25,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:25,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:25,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:26,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:26,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482561615] [2024-11-28 05:12:26,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:26,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478923702] [2024-11-28 05:12:26,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478923702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:26,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:12:26,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-28 05:12:26,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263093198] [2024-11-28 05:12:26,157 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:26,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:26,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:26,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:26,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:12:26,158 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:12:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:26,433 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2024-11-28 05:12:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:26,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-28 05:12:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:26,435 INFO L225 Difference]: With dead ends: 64 [2024-11-28 05:12:26,435 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 05:12:26,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:12:26,436 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:26,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:12:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 05:12:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-28 05:12:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-28 05:12:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-11-28 05:12:26,450 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2024-11-28 05:12:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:26,450 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-11-28 05:12:26,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:12:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-11-28 05:12:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:12:26,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:26,451 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:26,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:26,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:26,652 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:26,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:26,653 INFO L85 PathProgramCache]: Analyzing trace with hash -767367121, now seen corresponding path program 1 times [2024-11-28 05:12:26,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:26,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634583464] [2024-11-28 05:12:26,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:12:26,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352167660] [2024-11-28 05:12:26,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:26,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:26,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:12:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:26,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-28 05:12:26,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:26,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:12:26,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:26,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:27,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:12:27,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 05:12:35,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:12:36,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:37,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-11-28 05:12:37,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634583464] [2024-11-28 05:12:37,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352167660] [2024-11-28 05:12:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352167660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:37,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:12:37,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-28 05:12:37,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995256526] [2024-11-28 05:12:37,994 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:37,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:12:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:37,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:12:37,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=366, Unknown=2, NotChecked=0, Total=420 [2024-11-28 05:12:37,996 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:39,633 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-11-28 05:12:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:12:39,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-11-28 05:12:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:39,635 INFO L225 Difference]: With dead ends: 57 [2024-11-28 05:12:39,635 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 05:12:39,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=107, Invalid=761, Unknown=2, NotChecked=0, Total=870 [2024-11-28 05:12:39,637 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:39,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 77 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:12:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 05:12:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-28 05:12:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-28 05:12:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-11-28 05:12:39,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 31 [2024-11-28 05:12:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:39,658 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-11-28 05:12:39,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-11-28 05:12:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 05:12:39,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:39,659 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:39,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:39,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:39,860 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:39,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1258131647, now seen corresponding path program 1 times [2024-11-28 05:12:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:39,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103801679] [2024-11-28 05:12:39,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:12:39,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727031688] [2024-11-28 05:12:39,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:39,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:39,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:39,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:12:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:40,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 05:12:40,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:40,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:40,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:40,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:40,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:12:40,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:41,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-11-28 05:12:41,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2024-11-28 05:12:41,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:41,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103801679] [2024-11-28 05:12:41,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:41,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727031688] [2024-11-28 05:12:41,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727031688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:41,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:12:41,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-28 05:12:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129514587] [2024-11-28 05:12:41,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:41,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:12:41,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:41,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:12:41,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:12:41,735 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:12:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:42,194 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-11-28 05:12:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:12:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2024-11-28 05:12:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:42,195 INFO L225 Difference]: With dead ends: 62 [2024-11-28 05:12:42,196 INFO L226 Difference]: Without dead ends: 44 [2024-11-28 05:12:42,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:12:42,197 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:42,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 72 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:12:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-28 05:12:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-28 05:12:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 05:12:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-28 05:12:42,209 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 37 [2024-11-28 05:12:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:42,209 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-28 05:12:42,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:12:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-28 05:12:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 05:12:42,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:42,210 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:42,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:12:42,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:12:42,411 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:42,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:42,411 INFO L85 PathProgramCache]: Analyzing trace with hash -780307893, now seen corresponding path program 2 times [2024-11-28 05:12:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:42,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734310829] [2024-11-28 05:12:42,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:42,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:42,466 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:12:42,466 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:12:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459793455] [2024-11-28 05:12:42,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:42,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:42,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:42,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:42,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:12:42,666 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:12:42,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:42,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-28 05:12:42,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:42,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:42,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:12:42,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:42,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:43,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:12:43,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 05:12:44,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:47,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-28 05:12:47,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-28 05:12:47,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734310829] [2024-11-28 05:12:47,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:47,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459793455] [2024-11-28 05:12:47,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459793455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:47,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:12:47,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 05:12:47,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826481288] [2024-11-28 05:12:47,721 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:47,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:12:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:47,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:12:47,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:12:47,724 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:12:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:48,737 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2024-11-28 05:12:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:12:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-11-28 05:12:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:48,739 INFO L225 Difference]: With dead ends: 55 [2024-11-28 05:12:48,739 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 05:12:48,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:12:48,741 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:48,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:12:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 05:12:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-28 05:12:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 05:12:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-28 05:12:48,755 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 43 [2024-11-28 05:12:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:48,755 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-28 05:12:48,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:12:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-28 05:12:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 05:12:48,757 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:48,757 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:48,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:48,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:48,962 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:48,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1676561433, now seen corresponding path program 3 times [2024-11-28 05:12:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:48,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195296806] [2024-11-28 05:12:48,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:48,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:49,084 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:12:49,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:12:49,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139154659] [2024-11-28 05:12:49,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:49,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:49,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:49,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:49,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:12:49,651 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:12:49,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:49,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-11-28 05:12:49,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:49,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:12:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:49,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:49,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:12:50,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:12:50,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:12:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:12:50,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:55,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-28 05:12:55,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-28 05:12:56,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195296806] [2024-11-28 05:12:56,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:12:56,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139154659] [2024-11-28 05:12:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139154659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:56,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:12:56,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-28 05:12:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377081563] [2024-11-28 05:12:56,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:56,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:12:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:56,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:12:56,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:12:56,614 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-28 05:12:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:57,812 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-11-28 05:12:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:12:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-28 05:12:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:57,814 INFO L225 Difference]: With dead ends: 63 [2024-11-28 05:12:57,814 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 05:12:57,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:12:57,815 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:57,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 108 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:12:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 05:12:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-11-28 05:12:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-28 05:12:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-28 05:12:57,831 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 55 [2024-11-28 05:12:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:57,831 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-28 05:12:57,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-28 05:12:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-28 05:12:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 05:12:57,833 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:57,833 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:57,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:58,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:58,034 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:12:58,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1320029443, now seen corresponding path program 4 times [2024-11-28 05:12:58,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353671020] [2024-11-28 05:12:58,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:58,121 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:12:58,121 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:12:58,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976381716] [2024-11-28 05:12:58,125 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:58,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:58,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:58,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:13:00,747 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:13:00,747 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:00,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 225 conjuncts are in the unsatisfiable core [2024-11-28 05:13:00,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:00,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:00,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:13:00,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:01,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:13:02,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-28 05:13:02,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:06,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-28 05:13:06,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-28 05:13:08,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353671020] [2024-11-28 05:13:08,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:13:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976381716] [2024-11-28 05:13:08,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976381716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:08,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:13:08,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 05:13:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664642488] [2024-11-28 05:13:08,212 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:08,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:13:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:08,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:13:08,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:13:08,214 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 05:13:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:09,202 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2024-11-28 05:13:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:13:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 67 [2024-11-28 05:13:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:09,204 INFO L225 Difference]: With dead ends: 65 [2024-11-28 05:13:09,204 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 05:13:09,205 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:13:09,205 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:09,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:13:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 05:13:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-11-28 05:13:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-28 05:13:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-28 05:13:09,223 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 67 [2024-11-28 05:13:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:09,224 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-28 05:13:09,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 05:13:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-28 05:13:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 05:13:09,225 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:09,226 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:09,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:09,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 05:13:09,426 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:09,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1540822491, now seen corresponding path program 2 times [2024-11-28 05:13:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:09,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960349324] [2024-11-28 05:13:09,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:13:09,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:09,490 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:13:09,490 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:13:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118163800] [2024-11-28 05:13:09,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:13:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:09,495 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:09,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:13:09,838 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:13:09,838 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:09,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-28 05:13:09,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:09,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:09,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:13:09,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:10,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:10,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:10,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 05:13:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:13:10,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960349324] [2024-11-28 05:13:10,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:13:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118163800] [2024-11-28 05:13:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118163800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:10,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:13:10,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 05:13:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954275584] [2024-11-28 05:13:10,945 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:10,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:13:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:10,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:13:10,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:13:10,946 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 19 states, 14 states have (on average 2.0) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-28 05:13:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:11,600 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2024-11-28 05:13:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:13:11,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.0) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 49 [2024-11-28 05:13:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:11,601 INFO L225 Difference]: With dead ends: 70 [2024-11-28 05:13:11,602 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 05:13:11,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:13:11,603 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:11,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 96 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 285 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:13:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 05:13:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-28 05:13:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-28 05:13:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-11-28 05:13:11,617 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 49 [2024-11-28 05:13:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:11,618 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-11-28 05:13:11,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.0) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-28 05:13:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-11-28 05:13:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 05:13:11,623 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:11,623 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:11,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:11,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:11,824 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:11,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -393683553, now seen corresponding path program 5 times [2024-11-28 05:13:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:11,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34954532] [2024-11-28 05:13:11,824 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:13:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:11,962 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 05:13:11,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:13:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756388239] [2024-11-28 05:13:11,967 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:13:11,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:11,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:11,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:13:12,875 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 05:13:12,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:12,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 231 conjuncts are in the unsatisfiable core [2024-11-28 05:13:12,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:12,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:12,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:13:12,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:13,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:13:14,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-28 05:13:14,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:19,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-28 05:13:19,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-28 05:13:21,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:21,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34954532] [2024-11-28 05:13:21,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:13:21,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756388239] [2024-11-28 05:13:21,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756388239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:21,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:13:21,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-28 05:13:21,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095265767] [2024-11-28 05:13:21,098 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:21,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:13:21,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:21,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:13:21,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:13:21,099 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 05:13:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:22,344 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-11-28 05:13:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:13:22,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 79 [2024-11-28 05:13:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:22,346 INFO L225 Difference]: With dead ends: 67 [2024-11-28 05:13:22,346 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 05:13:22,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:13:22,347 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:22,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 164 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:13:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 05:13:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-11-28 05:13:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (21), 12 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 05:13:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-28 05:13:22,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 79 [2024-11-28 05:13:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:22,362 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-28 05:13:22,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 05:13:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-28 05:13:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 05:13:22,363 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:22,363 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:22,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:22,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:22,564 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:22,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1732070793, now seen corresponding path program 3 times [2024-11-28 05:13:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:22,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597853149] [2024-11-28 05:13:22,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:22,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:22,668 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 05:13:22,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:13:22,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516668635] [2024-11-28 05:13:22,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:22,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:22,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:22,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:13:23,100 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:13:23,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:23,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 225 conjuncts are in the unsatisfiable core [2024-11-28 05:13:23,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:23,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:23,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:13:23,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:23,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:24,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:13:24,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:24,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 05:13:25,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:32,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2024-11-28 05:13:32,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2024-11-28 05:13:32,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2024-11-28 05:13:44,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:44,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597853149] [2024-11-28 05:13:44,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:13:44,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516668635] [2024-11-28 05:13:44,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516668635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:44,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:13:44,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 05:13:44,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819051496] [2024-11-28 05:13:44,825 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:44,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:13:44,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:44,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:13:44,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:13:44,826 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 05:13:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:46,952 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-28 05:13:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:13:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 61 [2024-11-28 05:13:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:46,954 INFO L225 Difference]: With dead ends: 72 [2024-11-28 05:13:46,954 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 05:13:46,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:13:46,955 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:46,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 112 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 462 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:13:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 05:13:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-28 05:13:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-28 05:13:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-11-28 05:13:46,969 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 61 [2024-11-28 05:13:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:46,969 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-11-28 05:13:46,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 05:13:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-11-28 05:13:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-28 05:13:46,971 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:46,971 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:46,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:47,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 05:13:47,171 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:47,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash -647985733, now seen corresponding path program 6 times [2024-11-28 05:13:47,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:47,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180093029] [2024-11-28 05:13:47,172 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:13:47,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:47,259 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 05:13:47,260 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:13:47,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380089395] [2024-11-28 05:13:47,268 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:13:47,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:47,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:47,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:13:51,214 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 05:13:51,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:51,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 299 conjuncts are in the unsatisfiable core [2024-11-28 05:13:51,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:51,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:51,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:13:51,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:13:52,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:13:53,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:13:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 22 proven. 101 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-11-28 05:13:53,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:00,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-28 05:14:00,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-28 05:14:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180093029] [2024-11-28 05:14:03,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:14:03,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380089395] [2024-11-28 05:14:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380089395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:03,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:14:03,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 05:14:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503827080] [2024-11-28 05:14:03,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:03,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:14:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:03,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:14:03,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:14:03,610 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 24 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 05:14:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:14:04,949 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-11-28 05:14:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:14:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) Word has length 91 [2024-11-28 05:14:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:14:04,951 INFO L225 Difference]: With dead ends: 69 [2024-11-28 05:14:04,951 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 05:14:04,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:14:04,952 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:14:04,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 182 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:14:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 05:14:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-11-28 05:14:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 12 states have return successors, (22), 13 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 05:14:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-11-28 05:14:04,964 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 91 [2024-11-28 05:14:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:14:04,964 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-11-28 05:14:04,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 05:14:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-11-28 05:14:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 05:14:04,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:14:04,965 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:04,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:14:05,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:05,166 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:14:05,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1171863917, now seen corresponding path program 4 times [2024-11-28 05:14:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317643240] [2024-11-28 05:14:05,166 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:14:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:05,234 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:14:05,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:14:05,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089755130] [2024-11-28 05:14:05,239 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:14:05,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:05,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:05,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:14:06,144 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:14:06,144 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:06,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-28 05:14:06,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:06,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 05:14:06,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-28 05:14:06,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 05:14:07,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2024-11-28 05:14:07,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 47 [2024-11-28 05:14:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-28 05:14:07,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:09,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:09,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 498 treesize of output 497 [2024-11-28 05:14:09,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:09,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 195 [2024-11-28 05:14:27,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:27,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 498 treesize of output 497 [2024-11-28 05:14:36,006 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse2 (select .cse4 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse1 (* .cse2 .cse2 .cse2 .cse2)) (.cse0 (* .cse2 .cse2))) (or (not (= 0 (mod (+ .cse0 .cse1 (* .cse2 .cse2 .cse2 2)) 4))) (and (= (+ (* .cse2 60) .cse1 36 (* (* .cse2 .cse2 .cse2) 10) (* .cse0 37)) (let ((.cse3 (select (select (store |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse4 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse2 2))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* .cse3 .cse3) (* 2 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3)))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)))))) is different from false [2024-11-28 05:14:44,040 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:14:52,079 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse3 (select .cse5 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse1 (* .cse3 .cse3 .cse3 .cse3)) (.cse2 (* .cse3 .cse3))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (= (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4) (let ((.cse0 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse0 .cse0 .cse0)) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0)))) (not (= (+ .cse1 36 (* .cse2 37) (* (* .cse3 .cse3 .cse3) 10) (* 60 .cse3)) (let ((.cse4 (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse5 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 2 .cse3))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse4 .cse4) (* .cse4 .cse4 .cse4 .cse4) (* 2 (* .cse4 .cse4 .cse4)))))))) (or (= (mod (+ .cse1 .cse2 (* 2 .cse3 .cse3 .cse3)) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_51| Int)) (= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_33|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_51|) 4) (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse6 .cse6 .cse6)) (* .cse6 .cse6 .cse6 .cse6) (* .cse6 .cse6)))))))))) is different from true [2024-11-28 05:15:00,151 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:16:09,197 WARN L286 SmtUtils]: Spent 1.08m on a formula simplification that was a NOOP. DAG size: 25 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 05:16:09,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:16:09,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1212 treesize of output 1225 [2024-11-28 05:16:21,421 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:16:29,432 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:16:45,449 WARN L286 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:16:57,474 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 23 DAG size of output: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:17:13,488 WARN L286 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:17:29,506 WARN L286 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:17:37,514 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:17:53,531 WARN L286 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:18:01,538 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:18:21,750 WARN L286 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:18:29,764 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:18:46,524 WARN L286 SmtUtils]: Spent 16.76s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:19:02,547 WARN L286 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:19:18,564 WARN L286 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:19:26,573 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:19:34,603 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:19:50,619 WARN L286 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:20:06,635 WARN L286 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:20:30,908 WARN L286 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:20:39,104 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse25 (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse24 (select .cse25 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse21 (* .cse24 .cse24)) (.cse23 (* .cse24 .cse24 .cse24 .cse24))) (or (let ((.cse26 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse9 (select .cse26 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse22 (* .cse24 .cse24 .cse24)) (.cse7 (* .cse9 .cse9 .cse9 .cse9)) (.cse8 (* .cse9 .cse9))) (let ((.cse2 (+ .cse7 36 (* .cse8 37) (* (* .cse9 .cse9 .cse9) 10) (* 60 .cse9))) (.cse4 (store |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse26 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 2 .cse9)))) (.cse16 (store |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse25 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse24 1)))) (.cse5 (+ (* .cse24 12) .cse23 (* 6 .cse22) 4 (* .cse21 13)))) (let ((.cse0 (+ .cse21 (* 2 .cse22) .cse23)) (.cse13 (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (not (= .cse2 (let ((.cse19 (select (select .cse4 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse19 .cse19) (* .cse19 .cse19 .cse19 .cse19) (* 2 (* .cse19 .cse19 .cse19)))))) (= (let ((.cse20 (select (select .cse16 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse20 .cse20 .cse20 .cse20) (* (* .cse20 .cse20 .cse20) 2) (* .cse20 .cse20))) .cse5))))) (let ((.cse10 (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (not (= .cse2 (let ((.cse18 (select (select .cse4 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse18 .cse18) (* .cse18 .cse18 .cse18 .cse18) (* 2 (* .cse18 .cse18 .cse18))))))) .cse13)) (.cse11 (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse14 (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (= .cse0 (let ((.cse15 (select (select .cse16 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse15 .cse15 .cse15 .cse15) (* (* .cse15 .cse15 .cse15) 2) (* .cse15 .cse15)))) (not (= .cse2 (let ((.cse17 (select (select .cse4 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse17 .cse17) (* .cse17 .cse17 .cse17 .cse17) (* 2 (* .cse17 .cse17 .cse17))))))))) (.cse12 (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (let ((.cse1 (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse6 .cse6 .cse6)) (* .cse6 .cse6 .cse6 .cse6) (* .cse6 .cse6))))) (or (= .cse0 .cse1) (not (= .cse2 (let ((.cse3 (select (select .cse4 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse3 .cse3) (* .cse3 .cse3 .cse3 .cse3) (* 2 (* .cse3 .cse3 .cse3)))))) (= .cse1 .cse5)))) (= (mod (+ .cse7 .cse8 (* 2 .cse9 .cse9 .cse9)) 4) 0) (or .cse10 .cse11) (or .cse10 .cse12) (or (not .cse12) .cse13 (not .cse11)) (or .cse14 .cse11) (or .cse14 .cse12)))))))) (not (= 0 (mod (+ .cse21 .cse23 (* .cse24 .cse24 .cse24 2)) 4))))))) is different from false [2024-11-28 05:20:39,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317643240] [2024-11-28 05:20:39,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089755130] [2024-11-28 05:20:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089755130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:39,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:39,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-28 05:20:39,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610454797] [2024-11-28 05:20:39,125 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:39,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:20:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:39,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:20:39,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=401, Unknown=3, NotChecked=126, Total=600 [2024-11-28 05:20:39,126 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 05:20:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:40,246 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-11-28 05:20:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:20:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2024-11-28 05:20:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:40,247 INFO L225 Difference]: With dead ends: 66 [2024-11-28 05:20:40,247 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 05:20:40,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=164, Invalid=901, Unknown=3, NotChecked=192, Total=1260 [2024-11-28 05:20:40,248 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:40,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 87 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:20:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 05:20:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-28 05:20:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (14), 11 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 05:20:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-28 05:20:40,266 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 73 [2024-11-28 05:20:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:40,266 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-28 05:20:40,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 05:20:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-28 05:20:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 05:20:40,268 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:40,268 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:40,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:20:40,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:40,469 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:40,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash 259745111, now seen corresponding path program 7 times [2024-11-28 05:20:40,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:40,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283273777] [2024-11-28 05:20:40,469 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:20:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:40,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347610578] [2024-11-28 05:20:40,562 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:20:40,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:40,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:40,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:40,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:20:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:41,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 291 conjuncts are in the unsatisfiable core [2024-11-28 05:20:41,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:41,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:20:41,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:20:41,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:20:42,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:20:43,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:20:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2024-11-28 05:20:43,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:51,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-28 05:20:51,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-28 05:20:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283273777] [2024-11-28 05:20:55,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347610578] [2024-11-28 05:20:55,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347610578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:55,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:55,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 05:20:55,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980796127] [2024-11-28 05:20:55,405 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:55,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:20:55,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:55,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:20:55,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:20:55,407 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 24 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-28 05:20:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:56,676 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-11-28 05:20:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:20:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) Word has length 103 [2024-11-28 05:20:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:56,677 INFO L225 Difference]: With dead ends: 58 [2024-11-28 05:20:56,677 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 05:20:56,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:20:56,678 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:56,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 202 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:20:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 05:20:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-28 05:20:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 11 states have return successors, (15), 12 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-28 05:20:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-11-28 05:20:56,691 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 103 [2024-11-28 05:20:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:56,692 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-11-28 05:20:56,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-28 05:20:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-11-28 05:20:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-28 05:20:56,693 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:56,693 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:56,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:20:56,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 05:20:56,894 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:56,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2052596621, now seen corresponding path program 8 times [2024-11-28 05:20:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:56,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821775927] [2024-11-28 05:20:56,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:56,994 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:56,994 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:20:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420696474] [2024-11-28 05:20:57,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:57,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:57,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:57,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:20:57,962 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:57,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:57,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 317 conjuncts are in the unsatisfiable core [2024-11-28 05:20:57,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:57,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:20:57,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:20:57,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:20:59,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:21:00,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:21:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 25 proven. 111 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2024-11-28 05:21:00,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:08,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-28 05:21:08,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-28 05:21:12,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:12,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821775927] [2024-11-28 05:21:12,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:21:12,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420696474] [2024-11-28 05:21:12,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420696474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:12,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:21:12,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-28 05:21:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945387562] [2024-11-28 05:21:12,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:12,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:21:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:12,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:21:12,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:21:12,346 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 05:21:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:13,739 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-11-28 05:21:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:21:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) Word has length 115 [2024-11-28 05:21:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:13,740 INFO L225 Difference]: With dead ends: 60 [2024-11-28 05:21:13,741 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 05:21:13,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:21:13,744 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:13,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 201 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:21:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 05:21:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-28 05:21:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 12 states have return successors, (16), 13 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 05:21:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-11-28 05:21:13,770 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 115 [2024-11-28 05:21:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:13,771 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-11-28 05:21:13,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 05:21:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-11-28 05:21:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 05:21:13,773 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:13,773 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:13,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:13,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:21:13,974 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:13,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:13,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1362905871, now seen corresponding path program 9 times [2024-11-28 05:21:13,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:13,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193969910] [2024-11-28 05:21:13,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:14,158 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 05:21:14,158 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:21:14,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749572701] [2024-11-28 05:21:14,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:14,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:14,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:14,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:14,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:21:19,150 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 05:21:19,150 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:19,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 365 conjuncts are in the unsatisfiable core [2024-11-28 05:21:19,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:19,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:21:19,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:21:19,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:21:20,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:21:21,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:21:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 51 proven. 138 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2024-11-28 05:21:21,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:32,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-28 05:21:32,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-28 05:21:37,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193969910] [2024-11-28 05:21:37,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:21:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749572701] [2024-11-28 05:21:37,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749572701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:37,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:21:37,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-28 05:21:37,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391552087] [2024-11-28 05:21:37,151 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:37,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:21:37,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:37,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:21:37,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:21:37,152 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 12 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-28 05:21:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:38,849 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-11-28 05:21:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:21:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 12 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) Word has length 127 [2024-11-28 05:21:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:38,851 INFO L225 Difference]: With dead ends: 62 [2024-11-28 05:21:38,851 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 05:21:38,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:21:38,852 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:38,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 05:21:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 05:21:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-28 05:21:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (17), 14 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-28 05:21:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-11-28 05:21:38,871 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 127 [2024-11-28 05:21:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:38,872 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-11-28 05:21:38,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 12 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-28 05:21:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-11-28 05:21:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-28 05:21:38,873 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:38,873 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:38,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:21:39,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:21:39,074 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:39,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash 806818091, now seen corresponding path program 10 times [2024-11-28 05:21:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:39,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601720303] [2024-11-28 05:21:39,074 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:39,271 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:21:39,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:21:39,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58830821] [2024-11-28 05:21:39,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:39,282 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:39,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:26:40,228 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:40,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:40,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 407 conjuncts are in the unsatisfiable core [2024-11-28 05:26:40,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:40,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:26:40,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:26:40,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:26:41,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:26:42,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:26:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 42 proven. 178 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-11-28 05:26:42,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:52,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-28 05:26:52,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-28 05:26:57,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:57,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601720303] [2024-11-28 05:26:57,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:26:57,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58830821] [2024-11-28 05:26:57,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58830821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:57,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:26:57,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-11-28 05:26:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878711981] [2024-11-28 05:26:57,150 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:57,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:26:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:26:57,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:26:57,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:26:57,152 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (14), 13 states have call predecessors, (14), 5 states have call successors, (14) [2024-11-28 05:26:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:26:58,683 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-11-28 05:26:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:26:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (14), 13 states have call predecessors, (14), 5 states have call successors, (14) Word has length 139 [2024-11-28 05:26:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:26:58,684 INFO L225 Difference]: With dead ends: 64 [2024-11-28 05:26:58,684 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 05:26:58,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:26:58,686 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:26:58,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 276 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 05:26:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 05:26:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-28 05:26:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 14 states have return successors, (18), 15 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-28 05:26:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-28 05:26:58,698 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 139 [2024-11-28 05:26:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:26:58,698 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-28 05:26:58,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (14), 13 states have call predecessors, (14), 5 states have call successors, (14) [2024-11-28 05:26:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-28 05:26:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-28 05:26:58,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:26:58,700 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:58,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:26:58,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:26:58,900 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:26:58,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1767993657, now seen corresponding path program 11 times [2024-11-28 05:26:58,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:58,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619530783] [2024-11-28 05:26:58,901 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:59,098 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 05:26:59,099 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:26:59,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877119610] [2024-11-28 05:26:59,106 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:59,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:59,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:59,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:59,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a041b7-b028-4f29-a24c-42fc18f3de2b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:27:23,032 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 05:27:23,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:23,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 431 conjuncts are in the unsatisfiable core [2024-11-28 05:27:23,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:23,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:27:23,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:27:23,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 05:27:24,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 05:27:26,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 05:27:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 39 proven. 214 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-28 05:27:26,570 INFO L312 TraceCheckSpWp]: Computing backward predicates...